If you’ve scavenged some random keypads and want to reuse them in a project without the hassle of figuring out the pinouts, then [Cliff Biffle] has an interface module for you.The Keypad Go ...

Watch the video below to learn more about his Arduino-based portable keypad that connects to your Arduino development board and offers the complete alphabet, numbers 0-9 as well as several commands.

Try “Arduino in 555 timer form-factor” and you have an article on using DIP-8 AVRs. Piunora opens up both the 3v3 on 0.1″ pitch and USB world of MCUs or a non-CM pi, and PCIe from the ...