I love gadgets. My newly built development workstation has dual CPU’s. What could be better than blinky lights for each CPU? 🙂
The schematic is long gone for this dual LED CPU meter that I built years ago but it is pretty simple. A couple of 74*373’s are driven via the printer port data bits and switched with a 74*155. I built a really simple daemon (for Linux) that puts CPU usage for 2 CPUs on the LED strips.
I would like to make a better version using an Atmel AVR microcontroller someday.