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… ...

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 ...

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If you've ever wanted to build your own Arduino project, but don't know where to start, check out this complete starter kit + course bundle for 83% off.You'll get a ARDX starter kit for Arduino ...