It is a pretty common first project to use an Arduino (or similar) to blink an LED. Which, of course, brings taunts of: you could have used a 555! You can, of course, also use any sort of oscillato… ...

As a perfect example, these LED “blinking eyes” were created by [Will Moser]. Using nothing more exotic than some bare LEDs, an Arduino, and a cardboard box, ...

Open the LED blink example sketch: File > Examples > 1.Basics > Blink. You should see a window like in Figure 2. 3. ... Restart the Arduino* IDE. 6. Connect your desired sensor and run the code.

Connect an external 5VDC (1A) to VCC of 8×8 LED Matrix; Connect external 5VDC supply’s GND, to the GND of 8×8 LED Matrix Module; Note that the 8x8LED Matrix Module should be common-grounded with ...