You can control the brightness of these LEDs using variable resistors VR1, VR2 and VR3 respectively. Parts Needed Arduino UNO board – 1 5mm LEDs Red, Green, Blue – each 1 100K Variable resistor – 3 1K ...

I use pulse width modulation (PWM) techniques to control the brightness of light emitting diodes (LEDs) in many of my microcontroller projects. I can set my LEDs to the exact brightness level I like ...

Using an IRFZ44N, I made a simple LED driver and used an Arduino Uno directly. Remember the Arduino pins go up to 5V and I used the fade example that generates PWM out of the box.

Thank you [Yetihehe] for tipping us off about a link that [Tomas Martinsen] left when commenting about an Arduino library for up to 768 PWM outputs.

Subsequently, by using PWM we can modify the brightness of an LED without having to change a resistor. This can be applied to LEDs or other powered devices to manipulate how much power is supplied.

With the requirement to create an LED brightness control, the first idea that comes to mind is using a standard digital-to-analog converter, or design a controlled resistor network.

Intended for automotive interior/exterior lighting, architectural and ambient lighting, and other LED applications, the constant-current MAX16819/MAX16820 drivers control HBLEDS. Used in ...