Complicated Power Supply Help Needed

[itsme1414]

I am looking for a way to use the duty cycle on my function generator to make 2 different on and off times/pulses. Example would be 1 second on .5 seconds off and repeat. Have that running into some amp that can deliver 15 amps to a coil to make different on and off times/pulses to generate an on/off magnetic field in a coil/solenoid. Only way I have been able to do this is by hand so far and it is by no means accurate on the on/off pulse times. I made a nail board like people use when firing fireworks and I attached this to 2 separate coils with the nail board being powered by a 12 volt car battery. Basically shorting the car battery every time I fire using the nail board and just touching the power wire to each positive screw "connected to each coil" in the nail board back and forth but there is no way to get accurate timing. Hope this helps make sense of what I am doing but need something automated to achieve this. Thought about using capacitor discharges to do this but no way to accurately time the on/off and repeat pulses. If I could do this with just one coil that would be fine for now.

What I have found so far:
Could I input the function generator into this amp: https://www.ebay.com/itm/293093578653?ul_noapp=true
Then power the coils from the output? Would that amp see the coil as a dead short and not work? If so what could I put between the amp output and coil to make this work? Would a solid state switch work somehow in this setup?
Thanks for any help. I know what I want to do, I just need some help to build something to power it.

[bob91343]

It's not clear what you want to do but if you generate a rectangular wave with the on/off cycle you want, you can use it to trigger a gate that controls a solenoid.  Or two gates of opposite polarity to cause one or the other solenoid driver to activate.

Simpler would be to drive a PNP and an NPN power transistor, each driving its solenoid.  Your only concern is adequate drive as well as suppression of inductive spike on turn off (diode).

The PNP will activate when its base is pulled down, and the NPN when its base is pulled up.  If you want to drive a solenoid with a higher voltage you will need another transistor in each drive circuit.

If you only want to drive one solenoid you can omit either of the power transistors.

[itsme1414]

Thank you for the reply. I checked on the amp in that link and what I thought were inputs on the front for a function generator look like outputs.