Dawnmist Studio Electronics for Radio Control Modellers
Dawnmist Studio Electronics for Radio Control Modellers
Coming soon: We are constantly developing new products -- why not bookmark this page and re-visit it
regularly to see what's new! Please don't forget that proxy servers and net caches can sometimes leave old
pages lying around... to be sure you get the very latest, click REFRESH a couple of times!
To help you make an informed choice about our products, our web page now includes full copies of our
products' User Manuals for you to browse or download... so you can find out all about our products before
you buy!
Dawnmist R/C Products are available directly from us, or from selected model shops and dealers.
STOP PRESS:
Massive price reduction on UltiMix 5000! Click here for details
Recent Page Updates:
Dealer Enquiries are
Welcome from model trade retailers --- please contact us for details.
All Dawnmist Electronic Products are designed and made in Great Britain...
and are used by modellers Worldwide!
Best of British Quality -- Dawnmist Studio is an
approved supplier of electronics to Britain's Army and Air Force.
Page Contents
Now more affordable than ever at just £29.95!
As part of our continuing program to bring you the very best in R/C technology, we have revised the type of plug used to connect our products to your Receiver. We are now fitting extra-robust, thickly gold-plated plugs which are specially designed to tolerate the vibration and contaminants likely to be present in a high-speed motorized model. The new plugs are extremely resistant to metal-fatigue and have a three-way contact system -- in other words each pin has not one, but three, independently-sprung contacts, giving a "triple backup" for each connection.
Customer feedback with earlier products showed that a minority of users found the physically-small Rx plugs (that we previously fitted) awkward to plug and unplug. Our new plug design addresses this problem too -- the new plugs are a full 14 mm long and therefore much easier to insert and remove. The extra length incorporates additional "strain relief" to maximize the strength of the plug-to-wire joint.
This improvement applies to all products using Rx plugs (HyperBECs, Ultimix, Throttle Minders, ReverSafe, FlySpy and all ESC/RevESCs) and the new plugs are fitted to all products shipped from Dawnmist after 10 July 2005.
There is no extra charge for this improvement.
ESC-20/30/50 and RevESC-20/30 Series
ESC-20/ESC-30
ESC-50Dawnmist DC Electronic Speed Controllers
This brochure describes Dawnmist Studio's range of Electronic Speed Controllers (ESCs) for DC motors, a range covering 20 to 50 Amps at up to 30 Volts, giving a maximum power of a stunning 1500 Watts, with built-in failsafe and start-up interlock. The ESCs use technology developed for multi-Gigahertz computers to achieve unprecedented efficiency levels of over 99.5%, allowing the units to be small and run cool. All this is available at a very competitive price.
The ESC range is microprocessor-based with quartz crystal timing for superb speed accuracy, and will work with any standard R/C receiver (in place of a servo). The models available encompass three non-reversing models for aircraft use --- ESC-20/30/50, handling up to 20/30/50 Amps respectively --- and two reversible models for car/boat use --- RevESC 20 and 30 (20A and 30A respectively). Additionally, there is a reversible model for low-voltage use (down to 4.8 volts), the RevESC-20-LV. Unlike many competing products, the ESCs are continuously rated for operation at full current, and will tolerate short-term surges (up to 5 seconds) at twice the rated current.
The RevESC units configure the throttle stick in a 'centre zero' mode, as is usual for reversing ESCs. The foward range covers the full zero to 100% range, while the reverse range is restricted to half speed (0--50%) for better control in reverse. For special applications where equal forward and reverse ranges are required, we offer the 'EQ-R' option to special order at no extra cost.
The Dawnmist ESCs also feature a multi-purpose diagnostic LED to assist with trouble-shooting. This indicates safety lockout mode, loss of signal, glitches and motor on/off status at a glance. The ESCs are normally supplied programmed with a linear throttle curve (which can, of course, be modified using either a computer R/C or a Dawnmist Ultimix), but custom throttle curves can also be programmed --- please contact us if you require such a curve.
The on-board microprocessor provides fail-safe operation, by continuously monitoring the signal from the receiver. In the event of signal loss or corruption, the motor is brought quickly but not violently to a halt for safety, unlike many other makes of ESCs which will operate unpredictably under these conditions. Additionally, a false-start interlock is provided: upon power-up, the motor is not enabled until the transmitter stick is placed in the STOP position. This feature can avoid potentially dangerous accidents when the system is powered-up with the throttle stick in the wrong position.
The Dawnmist ESC range are compact, cool-running and highly reliable solutions to the need for speed control of DC motors up to 1.5kW in rating. For applications where R/C equipment is to be powered from the motor battery, the ESC range are designed to work alongside Dawnmist's HyperBEC range of Battery Eliminator Circuits (BECs).
The ESCs are packaged in a shrink-fit plastic sleeve to give a lightweight but fully
insulated unit, as depicted above. The ESC-50 alone has a small external heatsink made of
brass, which can be seen in the picture. Generously-rated cables are supplied with the
ESCs and can be cut to any desired length up to 25cm.
All our speed controllers are also available configured for non-radio-control applications: the
"VR" option (which costs no extra) specifies that, in place of the usual data lead and receiver (Rx)
plug, a potentiometer (knob) is used to set the motor speed. The knob can also be replaced by your
own equipment: a zero-to-five volt range sets the motor speed. This makes our ESC/RevESC family
suitable for many more applications.
All ESC/RevESC products are now fitted with our new ultra-reliable receiver plugs...
Click here for more about these.
Find Out More -- Click here to view the full ESC/RevESC User Manual...
| £19.95 (includes shipping to UK destinations only) | |
| USD 39.00 (includes airmail shipping Worldwide) | |
| EURO 34.00 (includes airmail shipping to EU destinations only) |
| £21.95 (includes shipping to UK destinations only) | |
| USD 43.00 (includes airmail shipping Worldwide) | |
| EURO 38.00 (includes airmail shipping to EU destinations only) |
| £24.95 (includes shipping to UK destinations only) | |
| USD 49.00 (includes airmail shipping Worldwide) | |
| EURO 43.00 (includes airmail shipping to EU destinations only) |
| £29.95 (includes shipping to UK destinations only) | |
| USD 59.00 (includes airmail shipping Worldwide) | |
| EURO 52.00 (includes airmail shipping to EU destinations only) |
| £29.95 (includes shipping to UK destinations only) | |
| USD 59.00 (includes airmail shipping Worldwide) | |
| EURO 52.00 (includes airmail shipping to EU destinations only) |
| £31.95 (includes shipping to UK destinations only) | |
| USD 63.00 (includes airmail shipping Worldwide) | |
| EURO 55.00 (includes airmail shipping to EU destinations only) | |
Technical Specifications
| Product Title: | Dawnmist ESC and RevESC family |
| Size/Rating (ESC20): | 20A cont, 40A surge, non-reversing, 40 x 28 x 9 mm, 9 gram (ex. cables) |
| Size/Rating (ESC30): | 30A cont, 60A surge, non-reversing, 40 x 28 x 9 mm, 9 gram (ex. cables) |
| Size/Rating (ESC50): | 50A cont, 100A surge, non-reversing, 78 x 28 x 9 mm, 17 gram (ex. cables) |
| Size/Rating (RevESC20): | 20A cont, 40A surge, reversing, 78 x 28 x 19 mm, 36 gram (ex. cables) |
| Size/Rating (RevESC20LV): | 20A cont, 40A surge, reversing, 78 x 28 x 19 mm, 36 gram (ex. cables) |
| Size/Rating (RevESC30): | 30A cont, 60A surge, reversing, 78 x 28 x 19 mm, 36 gram (ex. cables) |
| Supply Voltage (ESC): | 7.2V min, 30V max. |
| Supply Voltage (RevESC): | 8.4V min, 30V max. |
| Supply Voltage (RevESC20LV): | 4.8V min, 14V max. |
| Input: | 1 channel from Rx |
| LED: | Daylight-visible Red, multi-function |
| Failsafe: | Automatic, built in |
| Processor: | 20MHz RISC |
| Approvals: | Meets relevant CE specifications |
If you need advice on the correct choice of ESC for your application, simply
contact our technical helpline:
tech@dawnmist.demon.co.uk.
Back to Contents
If you use a BEC, read this!
Many R/C modellers today use Battery Eliminator Circuits (BECs) to power their receiver and servos from the same battery as is used to drive the model. For electric-powered models, this makes a great deal of sense --- it removes the need for a separate receiver battery and the attendant need to keep it charged. The theory is that even when the main battery becomes too weak to power the model, the BEC will still supply enough power to operate the R/C equipment properly.
But practice does not always live up to theory, and BEC problems are commonplace. The British Model Flying Association warns that "you should not use BEC in an installation where servo battery drain may be high or prolonged, for instance with four or more servos..." . Many experienced modellers will tell horror stories of crashes caused by BEC failures, and a study by Dawnmist has demonstrated that there are still many BECs on the market that are not capable of driving the R/C load claimed. One well-known model sold to helicopter modellers cannot even drive four micro-servos reliably. Some BECs even generate radio glitches, while others cut the power to the R/C while there is still enough power in the main battery to fly --- needless to say, this is disastrous!
As a result of these worries, many experienced modellers do not trust BECs, and prefer to use a separate R/C battery. This adds a great deal of weight, and makes it difficult to ensure that the R/C battery is adequately charged throughout a long flying session.
Help is at hand: Dawnmist HyperBEC 555
The Dawnmist HyperBEC 555 was designed to remedy all these problems once and for all. It uses the latest integrated PNP pass-element technology to provide a generous current (up to 5 Amps continuous, 7 Amps on surges) without compromising the output voltage. Its 'drop-out voltage' is in a class of its own, meaning that the power fed to the R/C will still meet the minimum 4.5 Volts required, even when the main battery is as low as 5.0 Volts and with a full 5 Amp current drain. No other BEC on the market comes close to this specification.
The Dawnmist HyperBEC 555 is also robust. Unlike most BECs, it will survive accidental reverse connection to the battery ( and will protect the R/C from damage!), and withstands output short-circuits. A generously-sized heatsink keeps the BEC cool even under the most demanding conditions. Low-noise linear circuitry avoids any possibility of generating radio glitches, and protects the delicate R/C from conducted noise generated by the motor and speed-controller.
The standard HyperBEC 555, suitable for inputs up to 16 volts, measures just 34 x 28 x 16 mm and weighs around 15 grams --- a remarkable size for such a powerful device. The HyperBEC 555HV is an up-rated version for use up to 27 volts, equipped with a larger heatsink and higher-rated input capacitor but otherwise identical to the standard model. HyperBEC is easy to install, too: two wires for the battery, and two wires to the receiver. A common need is to replace the in-built BEC of a speed-controller with a higher-performance BEC, and with the HyperBEC this is easy. Comprehensive but simple instructions show how to interconnect the R/C, HyperBEC and speed-controller.
All HyperBECs are now fitted with our new ultra-reliable receiver plugs...
Click here for more about these.
Find Out More -- Click here to view the full HyperBEC 555 User Manual...
Find Out More -- Click here to view the full HyperBEC 555HV User Manual...
| £19.95 (includes shipping to UK destinations only) | |
| USD 39.00 (includes airmail shipping Worldwide) | |
| EURO 34.00 (includes airmail shipping to EU destinations only) | |
| £21.95 (includes shipping to UK destinations only) | |
| USD 42.00 (includes airmail shipping Worldwide) | |
| EURO 37.00 (includes airmail shipping to EU destinations only) | |
Technical Specifications: HyperBEC 555
| Product Title: | Dawnmist HyperBEC 555 |
| Dimensions: | 34 x 28 x 16 mm |
| Weight: | 15 gm approx. |
| Battery: | 6--12 cells (series) NiCd/NiMH |
| or 2--4 cells (series) LiIon/LiPo | |
| Any number of parallel cells. | |
| Nominal Output Voltage: | 5.5 Volts |
| Output Current: | 5 Amp continuous, 7 Amp peak |
| Low-battery Performance: | 4.5 V out for 5.0 V in at 5 Amp. |
| Overcurrent Protection: | Current-limited output (appx 7.5A) |
| Input Protection: | Reverse and overvoltage protected |
| Thermal Protection: | Automatic switch-off on overheat |
| Approvals: | Meets relevant CE specifications |
Technical Specifications: HyperBEC 555HV
| Product Title: | Dawnmist HyperBEC 555HV |
| Dimensions: | 34 x 53 x 16 mm |
| Weight: | 26 gm approx. |
| Battery: | 6--20 cells (series) NiCd/NiMH |
| or 2--7 cells (series) LiIon/LiPo | |
| Any number of parallel cells. | |
| Nominal Output Voltage: | 5.5 Volts |
| Output Current: | 5 Amp continuous, 7 Amp peak |
| Low-battery Performance: | 4.5 V out for 5.0 V in at 5 Amp. |
| Overcurrent Protection: | Current-limited output (appx 7.5A) |
| Input Protection: | Reverse and overvoltage protected |
| Thermal Protection: | Automatic switch-off on overheat |
| Approvals: | Meets relevant CE specifications |
Dawnmist Lithimon 234, 5678 & 9012
The Lithium Battery Problem Solver
There are two principal sources of trouble: firstly, there's what is known as the Peak Pulse Effect. This is a result of the way that electronic speed controllers (ESCs) work. Instead of presenting a constant load to the battery, an ESC switches very rapidly between full-on and full-off, varying the motor speed by changing the ratio of on-time and off-time. This presents a pulsating load to the battery, and Lithium batteries object to this much more than other types. The result, if the problem is left uncorrected, is that the battery appears to go flat prematurely, but if rested for a minute or two will start providing power once again, just as if the battery were overloaded. The reason is that the battery is sensitive to the peak , not average, load. For example, Lithium Ion batteries are typically rated for 3.5-4.0 C , implying that a 1.4 Ah battery could drive a load of 5 Amps --- but the Peak Pulse Effect means that an ESC drawing 5 Amps (average) will actually be drawing peaks of typically 10 Amps, and these peaks overload the battery.
The second limitation of Lithium batteries is that they are
easily damaged by over-discharging, and must never be discharged below a specified value
(usually 3 Volts per cell, off load). Excessive discharge will permanently ruin the battery.
The compact, lightweight Lithimon unit is simply connected in parallel with the
speed controller, and has two functions. Firstly it uses a pair of energy-storage
capacitors to 'smooth out' the peaks of the ESC's energy demand --- thus presenting an
average, rather than peaked, load to the battery (these are purpose-designed capacitors,
since regular 'over-the-counter' types cannot meet the demands of Lithium batteries).
Lithimon supplies an extra burst of current to the ESC during the peaks to assist the
battery, while recharging in between the peaks. This happens automatically, thousands of
times per second. As well as curing the Peak Pulse Effect and allowing the battery to
work right up to its full rated current without going flat prematurely, Lithimon also
greatly extends the service life of the battery by avoiding overload conditions during
every peak, and furthermore, reduces the heat generated in the battery (wasted power).
Without the Lithimon's energy-smoothing function, the only way to deal with the Peak Pulse
Effect would be to use a much bigger battery, negating the principal advantage of Lithium
technology --- its light weight. The Lithimon's special energy-storage capacitors yield a pulse
impedance below 0.04 Ohms, which means that the Lithimon can provide the battery with assistance at an
impressive 25 Amps per volt dropped,
making the Lithimon family easily powerful enough for large models while
still small and light enough for use on indoor helicopters.
Three ultra-bright
LEDs, visible at a distance even in daylight, show the battery status, and an 85 decibel
audible 'Land Now!' alarm activates when the battery reaches its limit.
The Lithimon 234 covers batteries of 2, 3 or 4 series cells (7.2, 10.8 or 14.4 Volts nominal), while
the Lithimon 5678 covers 5, 6, 7 or 8 series cells (18, 21.6, 25.2 or 28.8 Volts nominal) and the
Lithimon 9012 covers 9, 10, 11 or 12 series cells (32.4, 36, 39.6 or 43.2 Volts nominal).
All versions offer three selectable discharge responses for moderate, heavy or very heavy current drain
applications. An on-board microprocessor uses a sophisticated measurement technique
(10-bit ADC with 64x oversampling and a specially-developed DSP algorithm) to obtain an accurate, stable battery level
measurement --- despite the peaks and surges from the ESC and motors, which would defeat a
simple voltage monitor.
| £17.95 (includes shipping to UK destinations only) | |
| USD 35.00 (includes airmail shipping Worldwide) | |
| EURO 31.00 (includes airmail shipping to EU destinations only) |
| £19.95 (includes shipping to UK destinations only) | |
| USD 39.95 (includes airmail shipping Worldwide) | |
| EURO 34.50 (includes airmail shipping to EU destinations only) |
| £21.95 (includes shipping to UK destinations only) | |
| USD 43.50 (includes airmail shipping Worldwide) | |
| EURO 37.50 (includes airmail shipping to EU destinations only) | |
| Product Title: | Dawnmist Lithimon 234/5678/9012 |
| Dimensions (234): | 35 x 20 x 22 mm |
| Dimensions (5678 & 9012): | 35 x 22 x 22 mm |
| Weight: | 12-13 gm approx. (exc. connecting leads) |
| Battery (234): | 2, 3 or 4 series cells LiIon/LiPo (7.2-14.4V) |
| Battery (5678): | 5, 6, 7 or 8 series cells LiIon/LiPo (18-28.8V) |
| Battery (9012): | 9, 10, 11 or 12 series cells LiIon/LiPo (32.4-43.2V) |
| All three units can handle any number of parallel cells. | |
| Peak Output Current: | 25 Amps per volt dropped (typical) |
| Pulse Impedance: | Less than 0.04 Ohm |
| Indicated States: | Good, Low, Alarm, Wrong Battery |
| Audible Warning: | 85 decibels (10 cm) at 2.3 kHz |
| Quantization: | 10 bits |
| Oversampling: | 64x |
| Signal Processing: | Dawnmist Proprietary Algorithm |
| Voltage Reference: | Temperature compensated bandgap circuit |
| Approvals: | Meets relevant CE specifications |
STOP PRESS... LITHIMON-HV is coming!
We are developing an extra-high-voltage version of Lithimon, able
to handle from 13 to 24 series cells for those really big models. If you have a present or future interest
in such a product, please email us and ask for full details!
sales@dawnmist.demon.co.uk.
Back to Contents
A real FlySpy screen picture
Video Camera System for Model Aircraft
Dawnmist FlySpy
Many aeromodellers have been struck by the appeal of fitting a video camera to their plane or helicopter, but until now this has been the province of a few specialists with big budgets and a team of electronics engineers. A few determined and knowledgeable amateurs have built home-made systems, but none has been really satisfactory. This is all set to change! Dawnmist Studio is proud to announce the FlySpy system, the first affordable, practical and high-quality wireless video camera system for model aircraft. FlySpy does not require a licence to operate, and is legal worldwide. It transmits at the maximum legally permitted power level to optimize its range.
FlySpy sends full-colour, full-quality moving video images from a miniature camera aboard the aircraft, down to a receiver on the ground. From there, the images can be displayed on a normal TV, recorded on a VCR or camcorder, or even fed into a computer with video input. The system is fully modular so you can configure it to your precise requirements, and includes transmitter, receiver and camera. The standard camera is ideal for most applications, but special cameras are available to order for specialist applications such as night-sight --- please contact us directly if you have special requirements and we'll be happy to give a no-obligation quote for a solution.
The FlySpy transmitter is very small and light, easily mounted in almost any airframe, and is powered by the R/C receiver battery or BEC (Battery Eliminator Circuit). The total power demand is much less than an additional servo. A miniature microwave antenna (6 cm long) relays the signal to the ground. The transmitter also has an upgrade facility to allow telemetry data (such as aircraft attitude and speed), or even sound, to be returned to the ground along with the video signal. Future products from Dawnmist Studio will offer a range of telemetry facilities, and these will simply plug in to the FlySpy Tx.
The camera too is powered by the R/C Rx's power source (via the FlySpy Tx) and can be mounted anywhere convenient to give it the desired field of view. It can even be steered by one or more servos to give a movable point of view. The standard colour camera weighs only 14 grams including cable and is not much bigger than one inch square. Despite its small size, it produces high-quality images under almost any lighting conditions, with automatic shutter, gain and colour-balance control. Focus is user-adjustable, and as supplied the camera will focus on anything between one metre and infinity.
On the ground, a pocket-size receiver picks up the signals from the aircraft and outputs a standard video signal to a TV, recorder or computer. Another output supplies (optional) telemetry data to a decoder or computer. The receiver comes with a miniature antenna (as for the transmitter), giving a typical transmission range of a few hundred metres when airborne. This antenna can be unplugged and replaced with a larger type if greater transmission range is required. The unit has a built-in NiMH rechargeable battery giving over 5 hours operation on one charge. A charge unit is also built-in, and simply requires a 12 Volt supply to charge the battery. An optional 12V mains adaptor is available for users who do not already have a suitable power source.
FlySpy can operate on four different channels to avoid contentions with other users nearby. Changing channels is simple and does not require crystals --- a jumper-link aboard the aircraft sets the Tx channel, while a rotary switch on the Rx selects the receive channel. FM modulation is used to give the best possible signal quality and freedom from interference, and the FlySpy Tx has been carefully designed to ensure that it does not interfere in any way with the operation of the remote control system. FlySpy is compatible with all R/C wavebands in use today.
The FlySpy system is attractively priced, a complete system costing no more than a high-specification R/C system. Recommended retail prices are as follows; Pound prices include shipping to UK, USD prices include shipping to USA, EURO prices include shpping to EU countries.
| £71.95 (includes shipping to UK destinations only) | |
| USD 129.00 (includes airmail shipping Worldwide) | |
| EURO 118.00 (includes airmail shipping to EU destinations only) |
| £117.95 (includes shipping to UK destinations only) | |
| USD 213.00 (includes airmail shipping Worldwide) | |
| EURO 194.00 (includes airmail shipping to EU destinations only) |
| £109.95 (includes shipping to UK destinations only) | |
| USD 199.00 (includes airmail shipping Worldwide) | |
| EURO 182.00 (includes airmail shipping to EU destinations only) |
| £11.99 (includes shipping to UK destinations only) | |
| USD 23.00 (includes airmail shipping Worldwide) | |
| EURO 20.00 (includes airmail shipping to EU destinations only) | |
| Transmitter | (Includes Antenna)
| Dimensions:
| 76x33x12 mm
| Weight:
| 31 gm (incl. cable)
| Power:
| 4.5--6V, 115mA typ.
| Output:
| 10dBm
| Frequency:
| 2.4 GHz, 4 channels
| Antenna:
| Coaxial dipole, 6cm
| Telemetry:
| 3-pin/2-channel,
|
| 20 kHz bandwidth
| Video System:
| CCIR/PAL or NTSC
| | | |
| Receiver | |
| Dimensions: | 145x80x34 mm |
| Battery: | In-built NiMH. |
| Output: | 1V CCIR/PAL |
| Connectors: | SCART or Phono |
| Telemetry: | 5-pin DIN socket, |
| incl. power and video | |
| Frequency: | 2.4 GHz, 4 channels |
| Antenna: | Interchangeable |
| As standard: | Coaxial dipole, 6cm |
| Video System: | CCIR/PAL or NTSC |
| Camera | |
| Dimensions: | 29x29x24 mm |
| Weight: | 14 gm (incl. cable) |
| Power: | 90mA typ. (via Tx) |
| Resolution: | 300 TVL |
| Video System: | PAL/CCIR |
| Sensitivity: | 4 lux |
| Shutter: | Automatic |
| Gain Control: | Automatic |
| White Balance: | Automatic |
| Lens: | 3.6mm F2.0 |
Computer functions on basic R/C!
Due to technical improvements combined with the UltiMix's increasing popularity, we are now able to offer
this outstanding product for a full 25% less than previously advertised. There are now more good
reasons than ever to make UltiMix a standard component in ALL radio-controlled models, even ones that don't need
a mixer...
Many modellers are attracted by the facilities of micro-computer R/C systems
(particularly the mixing and failsafe functions) but put off by the price. UltiMix
upgrades a standard R/C to computer-R/C functionality
and beyond for a fraction of the
cost by putting a micro-miniature, but fully-featured, computer system aboard the model
itself. This novel solution is made possible by the very latest microprocessor
technology, which has allowed us to pack previously-unimaginable levels of computing power
and on-board software into a package weighing just 17 grams, complete with the controls
needed for programming and setup. And despite its power and flexibility, it's very easy to
set up and use. UltiMix is built for reliability, using design techniques drawn
from aerospace research.
UltiMix combines a range of mixing, scaling and failsafe functions, and is entirely
user-configurable. It is ideally suited for helicopters --- a helicopter that would
normally require a 5-channel computer R/C can be flown from a standard 4-channel set using
our Collective and Tail mixing functions (CPM or CCPM programs, supporting 90 or
120 degree swashplates), or it can replace the clumsy and inaccurate mechanical mixers used
on some helicopters. Varying degrees of 'Exponential' may also be selected for easier
cyclic control. An additional feature is provided by the ability to connect the gyro
between the Rx and UltiMix, in effect making the tail-pitch mixing take place
after
the gyro correction, and thus preventing the gyro from trying to fight against that
change. This option, which is not possible on computer R/C systems which perform the tail
mixing at the transmitter, can make a tremendous improvement to the helicopter's
performance, especially with heading-lock gyros --- this is of great benefit whether
you're a beginner or a 3D champion!
UltiMix is equally at home in an aeroplane, where it can support control configurations
including V-Tail and Elevons (combined elevator/ailerons, used on delta-wing models
especially), or may just be used as a failsafe and/or exponential control in a standard
airframe. Ultimix also supports differential steering, as used on tracked vehicles (tanks) and some water craft.
Additionally, UltiMix can be programmed to reverse, 'scale' and/or offset (trim) different
channels, functions often lacking at the transmitter but extremely useful for ease of
mechanical setup. Even if your model doesn't need the mixing functions, the powerful exponential
control, failsafe and easy adjustment facilities make the UltiMix 5000 a very worthwhile performance-enhancing
addition to any R/C model.
UltiMix has four servo inputs from the receiver and/or gyro, and drives up to five servos (the
5th output allows Throttle/Collective tracking in helicopters). For R/C systems with more
than 4 channels, the additional channels simply drive servos directly, independent of the
UltiMix. All channels passing through the UltiMix, even if the unit is not programmed to
change them in any way, are subject to failsafe operation. The UltiMix constantly examines
the input signals from the receiver to verify that radio reception is OK, and detects
glitches, interference and loss of signal. When such an event occurs, the unit will hold
the controls in the last valid position for a selectable length of time, and then adopt
user-programmed 'failsafe' positions. Typically, the time interval might be set for a
second or so, to prevent momentary glitches from changing the flight path, while ensuring
that the aircraft is quickly put into a safe configuration if signal is lost. All failsafe
actions are totally user-programmable, so that the most appropriate failsafe behaviour for
your model may be chosen.
The failsafe action alone can easily pay for itself by avoiding damaging crashes, and
could even save a life. A failsafe unit is required by law on larger models, and is a
very worthwhile addition to any model. The UltiMix is a worthwhile investment for its
failsafe function alone, let alone the mixing and exponential functions. Correctly used,
exponential control can make a model very much more controllable, both adding to your
enjoyment of the hobby and reducing the risk of crashes.
The UltiMix can store five user-defined programs, so the unit can be moved from model to
model along with the Tx and Rx, if desired. This means that once all the details for a
given model are stored in the unit's memory, they can be recalled at the touch of a button
--- just like a computer R/C. Four miniature buttons are used for programming the unit,
which also has five multicoloured LEDs to indicate status. The unit does not require an
external power source, deriving the very small amount of power it requires to operate from
the receiver battery. Use of special non-volatile memory means that stored programs
remain intact indefinitely, without a battery --- so there's no risk of the unit
'forgetting' your programming.
Our products are backed up with a comprehensive e-mail technical support service, and we
have a policy of continuous product improvement, responsive to customers' requests and
suggestions. UltiMix is designed so that its internal software can be upgraded by us for a
nominal handling charge, so you can take advantage of future additions to the
functionality of the unit. Details of latest version numbers, new features and how to
upgrade are posted here.
When you compare the cost of the UltiMix with that of upgrading to a full
computer-controlled R/C system, you will see that it represents excellent value for money.
It is much less expensive to purchase a basic R/C and an UltiMix than to purchase
a microcomputer R/C; not only that, but the UltiMix offers much superior functionality to
many microcomputer R/C's.
All Ultimixes are now fitted with our new ultra-reliable receiver plugs...
Click here for more about these.
If you need advice on the suitability of UltiMix 5000 for your application, simply
contact our technical helpline:
Find Out More -- Click here to view the full Ultimix User Manual...
New LOW prices --- more affordable than ever before...
UltiMix 5000 gives you all this for a price tag of just...
Technical Specifications
£29.95 (includes shipping to UK destinations only)
USD 56.00 (includes airmail shipping Worldwide)
EURO 49.00 (includes airmail shipping to EU destinations only)
Dimensions:
58 x 24 x 12 mm
Weight:
17 gm (incl. cables/connectors)
Power:
4.5--6V at less than 25mA (one LED on)
Inputs:
4 channels from Rx and/or gyro
Outputs:
1--5 servos
Program Memories: 5 non-volatile, 1 temporary
Memory Type: Non-volatile FLASH memory
Memory Life: 40 years typical
Buttons: Cancel, Left, Right, Enter
LEDs: Daylight-visible Red, Yellow, Green, Amber and Blue
Failsafe:
Fully configurable, 5 channel
Processor:
20MHz RISC
Approvals: Meets relevant CE specifications
tech@dawnmist.demon.co.uk.
UltiMix Upgrades Available -- Click Here!
Back to Contents
The Throttle Minder from Dawnmist Studio is an economical, simple-to-use failsafe system for radio controlled models such as boats and cars. It is based upon the very sophisticated technology of Dawnmist Studio's successful UltiMix 5000, but trimmed down to just a single-channel failsafe and optional voltage monitor, and available for a fraction of the price of the UltiMix. Throttle Minder's advanced microprocessor technology provides the modeller with industry-leading protection and peace of mind at a very attractive price.
While UltiMix caters particularly to the high-end of model aircraft applications, many modellers have felt a need for a much simpler device that is sufficient to bring a non-flying model (e.g. car or boat) to a safe halt in the event of R/C malfunction, signal loss or battery weakness. Throttle Minder addresses this niche perfectly.
Throttle Minder is available in two models: the basic model, Throttle Minder 100 , provides the ability to detect a loss or corruption of the radio control signal and gives an immediate response by moving the throttle servo (or electronic speed controller) to a pre-designated 'safe' position in order to bring the model to a safe stop, thus avoiding possible damage or injury. The more advanced Throttle Minder 200 , although no larger than the -100, provides all of the features of the -100 plus a battery voltage monitor and 'brown-out detector'. This provides a second safety feature: should the receiver's power supply drop low enough (due to a flat battery or faulty Battery Eliminator Circuit) to jeopardise proper operation of the receiver, the unit will also switch the throttle to the 'safe' position.
Throttle Minder is user-configurable: when first installed in a model, it's a simple matter to program in your chosen 'safe' servo position, and (for the -200 model) equally simple to adjust the voltage at which the battery alarm trips (if the factory-set level is not suitable). Once 'taught', the unit retains this information, even in the absence of power, using a special memory. You can re-program the unit as many times as you like, so you can even move it from model to model.
Throttle Minder is very simple to install. It consists of a tiny, lightweight unit which connects in between the Receiver (Rx) and throttle servo (or speed controller) --- just one input and one output lead. The unit has a daylight-visible LED to show when a failsafe condition occurs, and a miniature push-button which is used for 'teaching' the unit. Setting-up takes only moments when installing the Throttle Minder; after that, your configuration is remembered indefinitely.
Needless to say, it requires a fair amount of computing power to continuously monitor a radio control signal for signs of glitches, interference or faults. Despite its tiny size and low price, the Dawnmist Throttle Minder contains a 20 MHz RISC microcomputer and sophisticated software. Advanced DSP software techniques enable it to reliably detect interference that could escape the attention of a less sophisticated failsafe unit and lead to a crash.
All Dawnmist R/C products are backed up with an Internet-based technical support service and a full warranty, and come with comprehensive instructions. The low price of the Throttle Minder makes it a very wise investment --- it can pay for itself many times over the very first time it averts a crash.
All Throttle-Minders are now fitted with our new ultra-reliable receiver plugs...
Click here for more about these.
Find Out More -- Click here to view the full Throttle Minder 100 User Manual...
Find Out More -- Click here to view the full Throttle Minder 200 User Manual...
| £14.95 (includes shipping to UK destinations only) | |
| USD 29.00 (includes airmail shipping Worldwide) | |
| EURO 24.00 (includes airmail shipping to EU destinations only) |
| £16.95 (includes shipping to UK destinations only) | |
| USD 34.00 (includes airmail shipping Worldwide) | |
| EURO 27.00 (includes airmail shipping to EU destinations only) | |
| Product Title: | Dawnmist Throttle Minder 100/200 |
| Dimensions: | 36 x 20 x 12 mm |
| Weight: | 8 gram (including cables/connectors) |
| Power: | 4.5--6V at less than 25mA (LED on) |
| Input: | 1 channel from Rx |
| Output: | 1 servo or speed controller |
| Memory type: | Non-volatile FLASH memory |
| Memory life: | 40 years typical |
| Button: | Single, multifunctional |
| LED: | Daylight-visible Red |
| Failsafe: | Configurable position, 1 channel |
| Battery Alarm: | Programmable 4.0--5.0V (-200 only) |
| Processor: | 20MHz RISC |
| Approvals: | Meets relevant CE specifications |
If you need advice on the suitability of Throttle Minder for your application, simply
contact our technical helpline:
tech@dawnmist.demon.co.uk.
Back to Contents
How often have you been cursed with a servo that rotates the wrong way? Or needed a pair of servos that turn in opposite directions?
The ReverSafe 100 from Dawnmist Studio is an economical, simple-to-use single servo reverser for radio controlled models such as aircraft, boats and cars, which also features a built-in failsafe device. It is closely related to Dawnmist Studio's successful Throttle Minder 100, but with an added reverser function.
Even if your application does not demand a failsafe, the ReverSafe 100 provides a simple cure for wrong-way-round servos at a very attractive price. For more complicated setups requiring more than a single-channel reverse and failsafe unit, we also manufacture the very sophisticated Ultimix 5000, which offers 4/5 channel operation and adds all the features of the best microcomputer R/C systems to any 'conventional' R/C. UltiMix 5000 provides total user programmability and a wide range of failsafe, reversal, mixing and exponential options, making it ideal for high-end aircraft/helicopter applications. ReverSafe 100 provides an inexpensive solution when only basic reversal/failsafe features are required.
ReverSafe 100 takes one input from a receiver and drives one servo. The signal output to the servo is the exact reverse of the input signal, so as to reverse the direction of rotation of the servo but not its angle of movement. This provides a simple cure for a problem that might otherwise require a complicated reversing mechanical linkage, or a solution when opposed pairs of servos are required. In the latter case, which is often found in aileron systems, the relevant receiver output drives one servo directly and, by means of a 'Y-cable', drives the opposed servo via the ReverSafe.
The principal purpose of the ReverSafe 100 is of course reversing a servo, though a simple failsafe is included at no extra cost. This provides for the detection of loss or corruption of the R/C signal, and when this occurs, moves the servo to a user-defined position.
ReverSafe 100 is user-configurable: when first installed in a model, it's a simple matter to program in your chosen 'safe' servo position. Once 'taught', the unit retains this information, even in the absence of power, using a special memory. You can re-program the unit as many times as you like, so you can even move it from model to model.
ReverSafe 100 is very simple to install. It consists of a tiny, lightweight unit which connects in between the Receiver (Rx) and the relevant servo --- just one input and one output lead. The unit has a daylight-visible LED to show when a failsafe condition occurs, and a miniature push-button which is used for 'teaching' the unit. Setting-up takes only moments when installing the unit; after that, your configuration is remembered indefinitely.
All Dawnmist R/C products are backed up with an Internet-based technical support service and a full warranty, and come with comprehensive instructions. The low price of the ReverSafe 100 makes it an unbeatable solution to the age-old problem of the 'wrong-way-round servo'.
All ReverSafe products are now fitted with our new ultra-reliable receiver plugs...
Click here for more about these.
Find Out More -- Click here to view the full ReverSafe 100 User Manual...
| £14.95 (includes shipping to UK destinations only) | |
| USD 29.00 (includes airmail shipping Worldwide) | |
| EURO 24.00 (includes airmail shipping to EU destinations only) | |
| Product Title: | Dawnmist ReverSafe 100 |
| Dimensions: | 36 x 20 x 12 mm |
| Weight: | 8 gram (including cables/connectors) |
| Power: | 4.5--6V at less than 25mA (LED on) |
| Input: | 1 channel from Rx |
| Output: | 1 servo |
| Reverse Latency: | Guaranteed less than 20 millisecond |
| Memory type: | Non-volatile FLASH memory |
| Memory life: | 40 years typical |
| Button: | Single, for setup |
| LED: | Daylight-visible Red |
| Failsafe: | Configurable position, 1 channel |
| Processor: | 20MHz RISC |
| Approvals: | Meets relevant CE specifications |
If you need advice on the suitability of ReverSafe for your application, simply
contact our technical helpline:
tech@dawnmist.demon.co.uk.
Back to Contents
Please note: Items will only be shipped upon receipt of payment unless prior arrangements for credit have been made.
We always acknowledge electronic orders by email within 24 hours -- if you don't hear from us within 24 hours, please email us!
sales@dawnmist.demon.co.uk.
or write to:
(We are sorry we are unable to accept telephone orders)
Back to Contents
Click here to go to the Dawnmist Studio Shop page