He ended up using multiple 74138 decoder/multiplexer IC’s to control the LED’s. Since the columns have inverted outputs, he couldn’t just hook them straight up to the LED’s.

I've been planning out a project and need a little help. I want a device that can control an LED strip and play an audio file on loop when a button is pressed. I know I can use a raspberry pi on ...

Pulse Width Modulation is definitely the preferred method of dimming an LED with a microcontroller, but we were interested in hearing about a different method called Binary Code Modulation. BCM doe… ...

Using an Adafruit FONA 800 shield, Adafruit TFT Shield w/Resistive touch, and an Arduino Uno developer board, along with a few other components, it’s possible to create your very own mobile phone.

In the Arduino board, digital outputs from D2 to D8 are used to drive segments (a to g), and digital outputs D9 to D12 are used for the digits (D0-D3) of the 4×7 LED display. Note that here the ...