Parallel port I/O module

Parallel port I/O module

Get 5 inputs and 8 outputs from a computer printer port using only a few transistors and resistors.

Read more →

AVR production line stop alarm

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.

Read more →