It can be programmed manually through DIP switches or via a USB connection to another computer, and also includes an adjustable clock which can perform steps anywhere from 1 Hz to 32 kHz.

In addition to the main board, [Scott] built bus monitoring and debugging tools, a front panel, a real time clock, an analog ... and designing a vintage Z-80 computer. There’s a good discussion ...

If you have a bedside lamp already, you can make a DIY sunrise alarm clock by replacing regular light bulbs with smart light bulbs from Lifx. These Wi-Fi-enabled bulbs connect to Alexa ...