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.
AVR production line stop alarm
Simple alarm circuit to monitor up to eight inputs, from e.g. production equipment. If any inputs are triggered an alarm is sounded. Uses the AVR AT90S2313 microcontroller.