So I attempted adding a resistor in series with the timing cap (ground >> timing cap >> resistor >> Disc Pin) and I tried a 100, 470, 1k and 2.2k ohm resistors. I noticed the discharge of the timing cap got faster however still not instantaneous. Any higher value of a resistor did not make any difference. Any thoughts?How are the 9V and the 5V connected to the 555?
Thank you for all your help and the time you’ve put into helping me. I just want to reiterate my circuit fully to you just for a chance that you may have 1 last thought as to why the discharge maybe slow.You either have a weird 555 or some sort of miswire.
Yeah, so they are 2 different things. I am not sure if I can share a full schematic of the device. But let me put it this way.You talk about a "device" and a "timer" as though they are different things. Do you have a full schematic?
I'm unclear about your setup, but it seems to me that the power to the 555 timer gets switched off at the same time as the mystery device. If so, the discharge transistor inside the 555 won't be conducting so the timing cap won't discharge quickly.The power supply provides 9V to the device, from a test point on the device the timer gets 5V and turns on.