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I built the Fat Cat Fuzz and decided to use a red/blue bi color led I had. I’ve never used bi color leds before, so I’m having some issues.
I soldered the led to the pcb for the 3pdt fs with a 2k resistor, the led didn’t work. I desoldered the led and when I touch either side of the anode/cathode, the red lights up on one side and when I flip the led, the blue side lights up. I noticed that R10 looks to be possibly a clr on the main pcb for an led. If that is correct, do I omit R10 from the board and use a clr on the foot switch pcb? Also, any suggestions on what value resistor to use to red/blue bi color led? I’ve read suggestions of using 470R.
Thank you for the potential help and have a wonderful day.
A CLR is needed only on the board to which the LED is physically attached. And the CLR value is entirely up to the builder. The lower the CLR value, the brighter the LED will be. I use anywhere between 2K7 to 12K depending on the specific LED. Typically a 3K9 or 4K7 will do fine.
I really appreciate the response Cyber. Looks like I’ll be removing R10 and soldering the clr to the fs pcb with the bi color led on the fs pcb as well. Have a great day!
Fred, it sounded like you did solder the CLR and the LED to the same board. You did not mention whether the LED is a common anode or a common cathode. The GuitarPCB circuit boards (both effect circuit boards as well as the 3PDT wiring boards) are for a common anode LED. A common cathode LED won’t work. It was a little unclear when you said you flipped it around it worked, but it seems to me that you may have a common cathode LED.
Wow, I actually didn’t know the were two different types. I’ll definitely check that out today when I get to the studio. Been using it without an LED, which is no fun.
Well……..thank you Bruce for your information. Turns out every package of bi color leds I have are all common cathode. Problem solved and also created a new problem. Good times!
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