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 – ...

8×8 LED Matrix modules are now widely available, and fortunately they are easy to use with our favorite Arduino microcontroller. 8×8 LED Matrix module have many applications in real life, such as ...

This LED DIMMER is an Arduino Uno based PWM (Pulse Width Modulation) circuit developed to get variable voltage over constant voltage.The method of PWM is explained below. Before we get start building ...

The same goes for all the LEDs. In our circuit we are going to use CA (Common Anode or Common Positive) type. If you want to connect more RGB LEDs, say 5, then you need 5x4= 20 PINS usually, but we ...

Circuit topologies for connecting LEDs. Erik Ogren looks at the choice between serial and parallel architectures for connecting LEDs. When designing a handheld device with a colour display using white ...

In this paper we designed a current-balancing circuit for an LED matrix and applied it to a 100-watt LED security light, consisting of an LLC inverter and balancing transformers. And experimental ...

Current imbalance among parallel light-emitting diode (LED) strings could put excessive current and thermal stress on some of the LEDs in the systems, resulting in reduction in system lifetime. For ...