jonnyjames1985
New Member
hi, im currently doing an electronics project, which i have designed with a bit of help. i am stuck trying to figure out one part of my circuit (see attached image), i have it working, but i dont know if the arrangement i have will function correctly when the circuit is made for real (it works in multisim). i have the first 555 timer (U3) set up to give high output until variable resistor r5 reaches 90%, then output low. this triggers the next 555 timer (U4). this gives me a timed output. as i said before it works on multisim but i cannot see how capacitor C2 can discharge. any advise would be much appreciated.