What the heck is going on here!
I buit this circuit on one of my breadboards.
**broken link removed**
The circuit asks for a LM324 op-amp but i didn't have one so i used two LM308 op-amps. The circuit worked just great.
but.... when I built the circuit onto a pcb the circuit doesn't work. I checked all my connections and they were fine. I thought maybe there was a wire that wasn't touching so i decided to unsolder everything from the pcb and retest the circuit on my breadboard. Everthing worked and the leds faded properly. So I was like hmm must of been a lose wire or something. So I attempted to re-solder everything back onto the pcb but it still woudn't work. The two leds would just stay on and would not fade in ond out.
I then used my knife and pressed on certain wires to see if there was a lose wire. when i touched the knife on one of the pins of the op-amp the leds started to fade in and out. The circuit seemed to work. Even when i touched that certain pin with my finger the circuit seems to function.... The circuit like finctions ghostly. hmm
Anyone know what the heck is going on here? This is the last circuit I need for my mod and i just don't see why the circuit won't work.
thanks
I buit this circuit on one of my breadboards.
**broken link removed**
The circuit asks for a LM324 op-amp but i didn't have one so i used two LM308 op-amps. The circuit worked just great.
but.... when I built the circuit onto a pcb the circuit doesn't work. I checked all my connections and they were fine. I thought maybe there was a wire that wasn't touching so i decided to unsolder everything from the pcb and retest the circuit on my breadboard. Everthing worked and the leds faded properly. So I was like hmm must of been a lose wire or something. So I attempted to re-solder everything back onto the pcb but it still woudn't work. The two leds would just stay on and would not fade in ond out.
I then used my knife and pressed on certain wires to see if there was a lose wire. when i touched the knife on one of the pins of the op-amp the leds started to fade in and out. The circuit seemed to work. Even when i touched that certain pin with my finger the circuit seems to function.... The circuit like finctions ghostly. hmm
Anyone know what the heck is going on here? This is the last circuit I need for my mod and i just don't see why the circuit won't work.
thanks