This is a random oscillogram from D5 of Arduino Uno. During experiments, I powered my Arduino setup with a Li-ion 9V/600mAh USB battery. Quick note: Arduino UNO has three timers – D5-D6 on Timer 0 ...

Every segment came out to a single pin, it could be jumpered to 3 others (L/R, and either up or down, depending, it was only 2 rows of pins). You got always on, on for turbo, or on for slow.

The first step is to physically set up the Raspberry Pi by connecting it to an LED and a push button. This simple setup serves as a foundation for demonstrating the basic functionality of GPIO ...