Hey all, a quick question for some one who uses fire buttons. Is the pulse cause by these enough to send a servo to full lock in one direction? I'm looking to use this to replace a knackered recoil circuit on a mfu.

Yep, at least a few minutes ago on my bench it extends it all the way immediately, then returns. That why I'm thinking the Turnegy chip for a slow return.

Great minds think a like! I might replace my Tamiya recoils if this works.

I wouldn't go that far, Tamiya recoil functions pretty well in my opinion. I'm using it on my T-34 conversion with Tammy M4 electronics which doesn't have recoil. It functions but until I set it up on another channel with mixes, it shares the elevation.

It works fine for momentary button firing since the elevation motor really doesn't have time to respond.

Intresting! Will using the elevation not activate the recoil though? I've a couple of tanks lined up with Tamiya mfus but servos are cheaper than recoil units.

With 4 channel there's servo (recoil) movement with elevation. The work around is use an aux channel and mix that in with 125% elevation. What that does is tells the Tamiya unit to fire as if you pulled full stick without doing it and isolates the servo from te normal elevation command.

Sounds confusing, but it really isn't, the only draw back is you can't set the right stick like a HL, but opposite, left stick drive or Tamiya's left throttle/right movement.

If your after right stick movement like HL there's a way round but you need a 5ch tx. Use channel five and replace the switch with a fire button, then use a splitter on channel 5, link one side into the servo and one side into the channel four lead on the Dmd, which is also split so it can be plugged into channel four on the RX. Hopefully gives servo recoil, sound elevation etc all synced.