Not exactly schematics, but [Duckman] has some Arduino pinout diagrams he made using ASCII-art. These could be useful when pasted into source code as comments, documenting the pinouts for your ...

A versatile compact Arduino power supply capable of providing from 4 to 40 volts and can output anything from 1.25 to 36 volts, with a maximum of 5A. ... (short circuit/under voltage, ...

TK discusses a portable power supply module known as a Battery Shield for Raspberry Pi and Arduino. Aspencore network. ... Power Supply Output: Switched 5VDC via USB type A port, 3x 5VDC (up to 4A) ...

Options to power the Arduino Nano include USB, VIN, ... The 5V pin can come particularly handy in cases when you're using a 5V supply — from a Battery Eliminator Circuit (BEC) ...

The APC220 header feeds power to the module on pins 1 and 2 (GND and 5 V) and connects pins 4 and 5 (UART) to Arduino pins 0 and 1. The APC220 module (see next image) has a total of nine pins (only ...

If they're working on compute stuff I'm really surprised that they haven't updated the actual hardware. The actual pi is over two years old at this point, which is basically an eternity. It wasn't ...