[Trent M. Wyatt]’s CPUVolt library provides a fast way to measure voltage using no external components, and no I/O pin. It only applies to certain microcontrollers, but he provides example Ar… ...

To write data, the WP (write protect) pin must be connected to GND. A typical interconnection between an Arduino microcontroller and a 24C256 serial EEPROM is shown in the table below. ... ARDUINO UNO ...

Only GND and VCC pins are doubled, if you think of it, a “power, ground and UART” connection would take 6 pins in such a configuration ...

All Arduino boards have this pin, and it's connected to the built-in voltage regulator that makes sure your board receives a stable supply. For the Nano, the VIN pin is found on Pin 30 (although ...

Noisecom’s JV9000 series of programmable and adjustable noise generators injects wideband noise and deterministic jitter signals into VCC lines for testing components that need to be qualified for ...