/diy/ - Do It Yourself

>>1666550
If you look at this crop you see all you need to estimate the value of the variable resistor (VR, pot) you need to replace the LDR in the swell pedal. The LDR acts as part of a voltage divider along with R101 (270K). A 1MΩ VR for instance would give you a max volume of 1M/(1M+270K) or nearly 80% of what is possible. The main level adjustment R131 allows you to correct that. The minimum is almost zero. Pots larger than 1MΩ may not so easy to come by and are not really needed even if the totally dark LDR may show a few MΩ after a while.