The following content is brought to you by Mashable partners. If you buy a product featured here, we may earn an affiliate commission or other compensation. Arguably one of the most useful second ...

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.

For years, Raspberry Pi — the world’s most innovative tiny computer — has turned the tech world on its head. This plug-and-play computer isn’t much larger than a credit card and fits easily in your ...