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.

With OC-192 systems hitting the street, members of the design community are now laying the groundwork for the development of OC-768 and other 40-Gbps optical networking systems. Like their 10-Gb ...

Hack a Day’s very own (and very prolific contributor) [Mike Szczys] put up a great tutorial on how to drive shift registers with an SPI interface. [Mike]’s earlier tutorial of the 595 shift register ...