While the Raspberry Pi has very good support for an I2C bus, a lot of very cool chips – including the in system programmer for just about every ATtiny and ATmega microcontroller – use an SPI bus.

[Tech2077] is one of the lucky ones who already got his hands on a Raspberry Pi. He’s been looking into different interface options with the GPIO header and just posted a guide to using an HD44780 ...

Raspberry Pi enthusiasts but are looking for an easier way to add multiple functions to their Raspberry PI models A+, B+ B2 and Zero mini PCs are interested in a new multifunctional Hat Board which is ...