2 gates are wired as a flip flop. Push button switch to one input to activate it. Photo sensor fires solenoid and drops gate. Signal from photo sensor goes through one 4093 gate with a 1.5 sec RC constant to the reset input of flip-flop which then turns the power fet off.
Flip-flop inputs are normally high and switch to ground.
Contact me directly if you need further help.
Amanda
Thank you all very much for your encouragement.
Amanda, I shall indeed give your excellent suggestion a days work and let you know the outcome. I am not that bad at following electronic circuits, but sometimes ones mind can get very wrapped up to the point of understanding confusion.
I shall report back later.
David HK[ Parent ]
