Here is an Arduino based circuit with three independent pulse width modulated (PWM) channels to fulfil your requirements! Just follow the schematic ... LEDs using variable resistors VR1, VR2 and VR3 ...

Now lets see the schematic and how I’ve connected the 8 leds + resistors and 1 button + pull-up resistor ... LOW); that is used to attach an interrupt on pin 2. In our case Arduino UNO has 2 external ...

If you searching for an LED matrix for your ... Want to connect new circuits? Thanks to these files, you will be able to.” – Includes an Arduino library that enables: show text, scroll text ...

[Alex] needed a project for his microcomputer circuits class ... He arranged all 128 LED’s into the grid on a piece of perfboard. All of the anodes were bent over and connected together ...