Looking for help making a simple on/delay/off circuit.I? Answered
I am looking for help making a ( hopefully simple ) circuit to drive an electronic relief valve.
What I have is a push button on a linkage and an electronically actuated valve.
I'd like a circuit that, when the button is pressed, will supply a 12v output for roughly 500ms immediately after the button is pressed, which will then turn off. The circuit must then remain off while the button remains held, until it is released and hit again.
Linkage open / Valve closed> Linkage closed / Button pressed >Valve open 500ms> Valve closed / linkage remains closed > Repeat
The system is for a turbocharged diesel engine. When the throttle is snapped shut, the boost pressure has nowhere to go. It tries to run back out the compressor housing. This results in a forceful drop in turbine RPM, and in extreme cases even completely stalling the turbine ( and blowing it to pieces ) I intend to vent this pressure back pre-turbo via a 2 inch valve. The short delay upon closing the throttle with this size of valve should be more than adequate. I also intend on wiring a boost pressure switch to disengage this circuit below 15psi. The turbo's anti-surge housing is effective at the lower pressure.
Any help with the circuit would be GREATLY appreciated!