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Production line stop alarm

This module was built for a production line at my previous workplace, its purpose was to serve as a single alarm system controller for an entire production line. It monitored up to eight machines, each with its own alarm timer. If an alarm was triggered; a one second signal was given with the horn. That input would then be muted, and not give any more alarm until the current alarm situation had been cleared for a minimum of seven seconds.

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Power supply and fuse monitoring module

This was the first AVR microcontroller module I ever built, it was made for and installed in the rack box project. As the name suggests it monitored that the essentials were OK, that means power supplies, fuses and communication. It used optocouplers to detect if the 5 or 12 V power supply failed, but depended on other modules for the fuse, emergency supply and communication failure.

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