The D.I.Y. FX Pedal Building Thread

[Dedman]

finished wiring this morning, got nothing If I press the switch it will by-pass, and I don't have the led coming on so I'm guessing I have the power socket wired wrong. Will try again tomorrow morning

[DrNomis_44]

finished wiring this morning, got nothing If I press the switch it will by-pass, and I don't have the led coming on so I'm guessing I have the power socket wired wrong. Will try again tomorrow morning

Also, check to see if you've got the Led wired up correctly, you can use a multimeter set to Diode Test to work out which lead is positive (A) and which lead is negative (K), you do this by touching the red probe to one lead and the black probe to the other lead, if the Led lights then the lead with the black probe touching it is the negative (K) lead, and the lead with the red probe touching it is the positive (A) lead.

If the Led doesn't light, swap the probes around, if it still doesn't light, it may be that the Led has burnt out and needs replacing, I have had one Led that I bought brand new not work at all.


If your plugpack that you're using to power the pedal is wired up as a centre negative, then check to make sure that the circuit grounds are connected to the centre terminal on the DC socket, hope that helps.


If you want, I can measure the voltages on the transistors in my Big Muff build so you have something to compare with while troubleshooting your build.