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.

My $35 server works harder than some PCs.

Adam has a degree in Engineering, having always been fascinated by how tech works. Tech websites have saved him hours of tearing his hair out on countless occasions, and he enjoys the opportunity to ...