Control three lights or relays, with toggle switches and status LEDs. Uses an AVR ATtiny2313 microcontroller.
Module heartbeat monitor, 6 inputs — AVR
Detects and alerts if any of the monitored modules goes silent; meaning their heartbeat stops. Uses an AVR ATtiny2313 microcontroller.
Monitored fuse box, 4 channels
A monitored fuse box that used to be installed in my rack box project, with 4 channels and 8 fuses.
Mute and light controller for the Rack box — AVR module
Controlling mute and lights in the rack box project. Uses an AVR ATtiny2313 microcontroller.
Stack lights and horn controller — with AVR
A control module for a green, yellow and red stack light, and signalling horn. Uses an AVR ATtiny2313 microcontroller.
Monitored fuse box, 6 channels
A monitored fuse box that used to be installed in my rack box project, with 6 channels and 12 fuses.
Power supply and fuse monitoring module, AVR
Simple monitoring module for the essentials in the rack box project; power supplies, fuses and communication. Uses an AVR AT90S2313 microcontroller.
Simple IO tester with 6 channels
A simple box with LEDs and switches to test digital inputs and outputs.
Wooden 2-post open rack frame
My first “rack” was made of wood. It monitored, meaning displayed and alerted, on some metrics on my Linux server. And controlled a few lights and the alarm system in my room.
I really enjoyed making the computer control the lights.
Parallel port I/O module
Get 5 inputs and 8 outputs from a computer printer port using only a few transistors and resistors.