I am designing a system where a relay is turned off for some time when a voltage is present at the input pin. When the voltage is present, C1 is discharged and the relay switches off as it's meant to. The only issue I'm struggling with is when the circuit is powered up for the first time, I have to wait about a minute for the capacitor to charge and the relay to switch on. How would I change the circuit so that C1 is charged once when the circuit is powered meaning that I don't have to wait for it to switch on?
