The Raspberry Pi GPIO Quick Reference Ruler is now available to back over on the Kickstarter website from just £3 with £1 Postage and packaging. Watch the video below to learn more about it.

The Raspberry Pi takes 5 volts to run, and you can connect it directly to the GPIO (general purpose input/output)—the 26 pins next to the yellow video out socket (shown above).

Using the same experimental setup, the Raspberry Pi 2 is about 2 to three times faster. The fastest is still the C native library, topping out at just under 42 MHz.

One of the biggest draws of the Raspberry Pi family of single board computers or SBCs is their expandability. That comes via the standard 40-pin GPIO header on the full-sized boards.

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.

Unfortunately, that guide didn't exist when I first wanted to do this, so instead I had to piece together what to do (specifically which GPIO pins to connect to which pins on the clip) by combining a ...

Here is everything you need to know about Raspberry Pi, the tiny, ultra-cheap computer that has taken the world by storm.

There’s currently a significant amount of confusion around the full extent of the GPIO hardware issue in the Raspberry Pi RP2350 microcontroller, with [Ian] over at [Dangerous Prototypes] of … ...

Externally, the Raspberry Pi 5 looks like its predecessors. The size of the board is unchanged, as is the 40-pin GPIO strip. The USB ports and the network socket have been swapped compared to ...