nickelflippr
Member
Well, why wasn't my 555 astable circuit tranferring from breadboard to proto circuit with strip style power rails? That had me baffled for over a day.
This was for a longish delay of over five plus minutes, R1+R2 to be 3M plus, and C1 of 150uf. Clean up tracks, inspect for solder bridges, check. Add bypass caps across V+ and gnd, check. Add bypas cap from control voltage pin to ground, check. Using same power supply, check.
I remember someone mentioning the use of home run wiring on a smps circuit I was working on a while ago. Huh, maybe the ground bus was messing with C1 somehow? Ran a home run wire for the 555 gnd and C1- pins to power input pin, and BINGO! works like a charm now.
Apparently, all the stuff hanging off the multi strip ground (approx. 15" total length) rail was upsetting C1, and the astable circuit function.
This was for a longish delay of over five plus minutes, R1+R2 to be 3M plus, and C1 of 150uf. Clean up tracks, inspect for solder bridges, check. Add bypass caps across V+ and gnd, check. Add bypas cap from control voltage pin to ground, check. Using same power supply, check.
I remember someone mentioning the use of home run wiring on a smps circuit I was working on a while ago. Huh, maybe the ground bus was messing with C1 somehow? Ran a home run wire for the 555 gnd and C1- pins to power input pin, and BINGO! works like a charm now.
Apparently, all the stuff hanging off the multi strip ground (approx. 15" total length) rail was upsetting C1, and the astable circuit function.