With Opto-pi, there is not an electrical connection between the Raspberry Pi and connected loads (motors, relay coils, etc.) or input signals. Opto-pi uses light to isolate the 8 digital GPIO pins.

Posted in Raspberry Pi Tagged gpio, power supply, RPi ← Open Source Brushless Motor Controller Homebrew 68k Extravaganza → ...

The Raspberry Pi 3 Model B+ features 1 GB of LPDDR2 RAM, 40-pin GPIO expansion header, full-sized HDMI port, four USB 2.0 ports, a CSI camera port ready and waiting for the Pi camera module and a ...

The caps store just enough power that when the main supply is cut, a GPIO notices, tells the Pi, and it begins a shutdown sequence lasting about 30 seconds.

The Waveshare PoE HAT emerges as a practical solution to these challenges, offering a way to power your Raspberry Pi 5 using just an Ethernet cable.