I built an accelerometer for a steel target that has a dry set of contacts that close when a bullet strikes the steel target. The closed contacts trigger an electronic flash that can be seen for over 1,000 yards. We try to video the flash and the duration of the flash is so short 50% of the time the electronic "shutter" does not see the flash. The trigger only allows one flash as it resets in one millisecond.
I would like to build a timer that will trigger the flash for two or three seconds then goes to sleep waiting for the next dry contact closure.( no voltage,there cannot be, just continuity)
6 Volts DC is supplied by a tractor battery,so current is not a problem.
The unit will be in the weather and need to be in an enclosure while in use.
The timer will be at least 50 feet away via a 22 gauge cable from the target and needs to be able to trigger the flash as fast as possible. Adjustable time to compensate for the delay of the capacitors in the flash to charge and fire.
So, what I need is: BANG! .......Clang!..flash,flash,flash,.... reset ready for next bullet strike.
Thank you for your help.