Have a working project but at present for testing on the bench am using a 9vdc wal wart 200ma
End use the project will be connected to an automobile which has a voltage supply of 12-14v dc.
testing using the wal wart I show 80ma at 9v
reverse calculations I show draw 1.2 amps in the car if I figured correctly?
still need to insert a fuse so at 1.2 amps thinking maybe a 2 amp fuse?
pictured is a combo unit which I had planned but going to build two seperate units. at present, regarding reverse calculations, the PIR, photo transistor and associated components are not included (I thought I had a png file with just the unit under test)
are my calculations correct and fuse size?
Audioguru contributed the mosfet H bridge design, thanks it works on the bench now to test in an automobile.