Prepare a musician playing a guitar preamp tone control circuit “gain, deep, press, bass, treble, medium” and make controls debra opamf TL072 JFET transistors on the board.
Supply voltage 12 volts dc. 4 amp 12v battery and circuit performance would be better if you can use the parts list diagram drawing PCBs are
Guitar Preamp Effect Test Sonud
Just an additional info for this 9V version without MAX1044, do not hesitate to add a Shaddo filter directly on the DC Jack because this pedal is full gain and according to the original plan, there is no capacitor filter on the branch which supplies the JFET buffered and the TL072.
source: Guitar Preamp Effect Circuit schematic pcb files alternative link:
Guitar Preamp Effect Circuit ZIP File Password: 320volt.com
PIC18F2550 Projects Test and Development Board
PIC18F2550 PIC18 series are popular in handy for a trial modification circuit. LCD and GLCD tests done 6-channel ADCs 10’s USB connection and has an additional power supply input schema, PCB, parts list and shared with the sample application testing software