Here is a simple Arduino Camping Light project. In this design, only one push button switch is used to control the light output (from a bunch of white. ... dim, medium, and high brightness * Test ...

I use pulse width modulation (PWM) techniques to control the brightness of light emitting diodes (LEDs) ... // Test LED wire to D9 void setup() { // Set the pin as a digital output pinMode(outputPin, ...

I wired up a test board with the same LED panel such that the brightness is controlled using the IADJ pin. A simple preset was used to vary the voltage between 0.8 and 1.8 volts at the desired pin.

(Said another way – any brightness will only use one of the cycle lengths). * If gamma is >2, gamma code modulation would use fewer interrupts (e.g., 256, rather than 1024 in the above example).