Monday, 19 January 2026

Boss NF-1 Noise Gate

 Another awesome contribution Chris Stelloh.

 Another 1980's Boss pedal I use a lot, here's the modified layout for the original gray NF-1 Noise Gate, courtesy of Guitar Electronics DIY PCBs in PolanD: SCHEMATIC 

 I reversed the wiring for the decay pot, since it was working backwards from the original. The LM741 IC is being powered by a 1k resistor-limited supply, so I put the LED+ pad on that rail without any additional current limiting resistors, but if you need your status LED to be dimmer, you can add an extra cut at B23 and place a three column CLR from B22 to B24. As far as the trim pots go, I set the "RNG" to max and the "LVL" somewhere in the middle on my build.


 

1 comment:

  1. Hey everyone - as far as the trim pots go - you'll want to use the small cermet trimmers, and make sure that you keep the legs away from the jumper underneath since it goes to ground. Also, you'll want to mind the marker on the 2u2 tantalum capacitor, it marks the anode, not the cathode leg.

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