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Just go for the radio controlled relay controlling a larger relay (you could use a 40A car relay for a few quid). Any other interface with radio will be more of a headache and less reliable.
The other way that jumps to mind would be to use a servo hitting a microswitch which powers the control side of a relay. I wouldn't advise this route as it's not a failsafe proof system.
servo and microswitch not recommended. Almost ripped my robot apart :cry:
if you buy a external failsafe or have a spektrum its fine
Good point about the failsafe side of things.....
I'll need to consider that.
on some txs and rxs you can program the failsafe position so you could make it so servo failsafed so that the microswitch isn't pressed.
I would still recommend the RC relay option. Not that much more expensive.
ALWAYS consider the failsafe and takes as many precautions as possible when dealing with spinning weapons.
I may try and hack a servo to create an RC relay.
What is it exactly that turns low power gate of the big relay on and off? Does it just listen for a current?
This is in keeping with the Bitza theme..
http://trebor69.tripod.com/speedcnt.html
you should be able to use the fets and heatsinks from any stripped down drills.
same thing with power transistors.
http://www.rc-airplane-advisor.com/elec ... oller.html
http://www.rc-airplane-advisor.com/elec ... hotos.html
DON'T TRY AND RUN THE CONTROLLER AS A SPEED CONTROL ..IT'LL GET TOASTY!...on and off should be fine...maybe.....
Good find!
Should I just use these to control a bigger relay then?
no you could use the mosfet to directly control a motor
should have said, you will be able to pick up the resistors and FETs off ebay for next to nothing