Chris took up a project on the DIY clock and created this LED-based clock that is controlled by an ATtiny84 chip.
The clock contains 24 LEDs in total, 1 representing each hour and 1 for every 5 minute increment. The 24 LEDs are neatly placed in 2 concentric rings. To display the hour, both LEDs at the same angle are lit up. To show the minutes, only the inner led is lit. The clock in the above picture shows 6:40. In general, Attiny84 clock has only 12 in/out pins, which is not enough to control the LEDs. Hence, Chris decided to use some 74HC595 shift registers to increase the in/out pins on the ATtiny. The entire setup sits on a protoboard with quite a bit of point-to-point wiring. A simple-tinted plastic case covers the clock and gives it a modern look.
Chris has made his clock tutorial available to those readers who are interested in trying one.