Hi everyone, long time viewer, first time poster.
I'm trying to create a circuit that generates an instant rise and exponential drop when I press a button. I need it to act so that pressing the button sends the signal high and then when the signal reaches its peak it begins to decay exponentially.
I've got something working using an RC circuit, but holding the button keeps the signal high until it is released, and ideally I need the signal to begin to decay as soon as it reaches its peak. I'll attach my schematic for reference. The voltmeter and resistor would be replaced by an output jack to go to the circuit I hope to control - the 5v control input of a voltage controlled filter. The button will be replaced with a 5v pulse signal from a microcontroller eventually.
Any help would be greatly appreciated.