CLRs

A Current-Limiting Resistor (CLRCLRs A Current-Limiting Resistor (CLR) is a resistor used to regulate the amount of current that a LED may draw. Too much current can cause the LED to burn-out, while too little can prevent it from lighting up. In effects pedals, a CLR is often found connected to the anode of the "on/off" indicator LED.) is a resistor used to regulate the amount of current that a LEDLEDs Light-Emitting Diodes (LEDs) are small, polarized diodes that act as tiny lightbulbs. In effects circuits, they're most-commonly used to indicate the "on/off" state of a circuit, but can also be used as clipping diodes in distortion-type circuits. may draw. Too much current can cause the LED to burn-out, while too little can prevent it from lighting up.

In effects pedals, a CLR is often found connected to the anode of the “on/off” indicator LED.