The Transistor Clock is made using only discrete components–194 transistors, 566 diodes, 400 resistors, 87 capacitors, and absolutely no integrated circuits. It’s available as an open-source kit from KABtronics. [via Hack a Day]
I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I write for MAKE, serve as Technical Editor for MAKE magazine, and develop original DIY content for Make: Projects.