I am looking for device, home brew or kit, which will operate in the following manner.
When + 12.8 VDC car battery voltage is applied to the input, the SS output will conduct +12.8 VDC car battery voltage for 1 to 10 [adjustable] seconds, with a current rating of 5 amps minimum.
Example of the desired operation, 12.8 VDC applied, 12.8 VDC conducted for 5 seconds and while the 12.8 is still applied the output is canceled. Once the 12.8 VDC input is released, the device is reset.
I don’t think a relayed device will operate fast enough.