rocket timer

first

chip

or

You could do it in hardware without using a micro but I bet you will find you need to change the time intervals at some point. A micro is frequently easier in the long term. See if this chap can modify the code in his rocket timer for you.

I would use a microcontroller (but then I already know how to program them). I would probably make the trigger interval programmable via jumpers that the controller would read at power-up. Also possible to program other things via jumper, e.g. enable/disable trigger-at-blastoff or trigger-at-chute-open. I bet the payload weight of a micro and jumpers would be much less than that of the same function(s) implemented in individual logic chips. And functions implemented in a micro would definitely be easier to modify.

first

momentary

chip

pic or

and

when

it

but

I'm not programmer either but I picked up PIC assembler alright. It's not too hard if you have some examples to start from. See the page I posted before - it has source code.