Computer Nerd Kev


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R/C Servo Signal Trigger Kit FAQ

What's in The Kit?

Everything in the picture of the assembled board but with a bit less assembled-ness. :)

In slightly more specific terms, the kit comes with a high quality solder-masked PCB and all the components you need t build the Signal Trigger. The included Relay is rated for maximum current of 2A. Of course if there's any worth in me saying so, you don't get a transmitter, receiver or Servo.

See the instructions for a full parts list.

What is required?

What's a half decent idea of how to use the above?

Well, electronics-wise it's basically having some idea of how to solder stuff together and, well drill a hole. There aren't any surface mount components or other particularly tricky soldering tasks so the board could be put together by someone with only a bit of experience. But that said, its not an ideal beginner board because some of the components are quite tightly packed.

Will it Work With My R/C Gear?

It should work with any analogue system, however small servos with little resistance on their shaft may turn a bit when the trigger button is pressed. Digital servos may work very well or not at all depending on the model as some turn to maximum when the signal is cut, see the instructions for details. Of course if there's no problem with the Servo turning when you press the trigger button (such as when only a momentary press is required), any servo will be fine.

Digital transmitters such as those using 2.4GHz transmission that don't use mechanical trim (the trim adjustment doesn't physically change position in reflection of its setting) may require additional modification as described in the instructions.

The transmitter modification procedure is described in the Instructions for "Aircraft Style" transmitters. "Pistol Grip" type transmitters should be compatible, however some changes may be required to the modification process to adapt to the different layout.

What are the Power Requirements?

The Signal Trigger works over a range of 5V-12V (technically it should work to 15V, but if running off batteries, a 15V supply would often be much more). Most receivers run off 6V or 7.2V.

Current consumption is about 4mA with the relay off, 70mA with it on. For loads under 200mA the Relay may be omitted and circuit current consumption kept at 4mA or less in either state.

What Do I Need To Modify in My Transmitter?

The transmitter modification is quite simple, just swap some wires going to the control stick assembly to hook in the push button which is mounted in the transmitter case. A hole needs to be drilled in the case to accommodate the button.

Will The Modification to the Transmitter Void My Warranty?

Most likely, but you have to mount the button somewhere. The modification is quite simple, so there's little chance of damaging the transmitter, unless done carelessly.

Can I Buy This Kit Assembled?

Sorry, assembled boards are no longer available.

You'll still need to install the button in your transmitter, but this only requires very basic soldering skills as no modification to the transmitter circuit board is required.


Content Copyright Kevin Koster 2014