Hello,

The current from the Tamiya DMD is more than enough to run the HL recoil. I hooked up the + and - negative poles direct and it ran fine. The tricky part is wiring the switch right so that it cuts out at the right time. A weaker spring would not hurt though, that is for sure. Safety first.

Hooked up directly, and with no micro switch cut out, (that is the hard part that needs to be solved) the motor runs for about 30secs and then stops on its own accord when the DMD shuts the pre timed power supply down.

Another option I thought of was to wire a series of resistors into the circuit so that the power supply lasted just long enough to give you one recoil. This works on the old Elmod setups and works really well too.

The old Elmod version 1 recoil instructions look like this:



I did try this on a Tamiya DMD some time ago however could not get the right balance of resistors etc to achieve just one recoil, it was either too many or not enough. But the potential was there. I expect someone with the right know how could work out exactly what resistance was required and get it to work ok. (this way you could get a DMD with a damaged recoil circuit to work again).

I look forward to seeing how you get on with your experiments.

Cheers

Alan.