There are so many nice hacks in [Joekutz]’s retro LED display project that it’s hard to know where to start. There’s his DIY LED display controlled by an Arduino UNO. To have some… ...

It seemed that most multifunction shields don’t have their pins of the seven-segment LED display module trimmed enough. They will likely come into contact with the top of Arduino’s USB connector.

The 1K resistors are used for base current limiting, and the 390R resistors limits the operating current of the LED display segments. In the Arduino board, digital outputs from D2 to D8 are used to ...

Arduino’s Plug and Make Kit lets your hacking ... and a built-in 12×8 LED matrix display. ... By "attach," I mean running one of those little push-in-with-your-fingers cables from the ...

To display the caller’s information, [Dilshan] is using an Arduino Uno and common 16×2 HD44780 LCD. As a nice touch, the code will even blink the Arduino’s onboard LED when you’ve missed a ...