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Power supply and fuse monitoring module New

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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The Rack Box project

When I was young and single I had a lot of spare time. I lived in a tiny apartment and wanted to build electronic modules for home-automation and whatever really. I just wanted to solder and make circuit boards. So I got myself a server rack box, and started making electronics and microcontroller modules to fill it with.

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Fuse box with 6 monitored channels

This fuse box module used to be installed in my rack box project. It had a total of 6 channels, or outputs, each with fuses on both polarities. All fuses were monitored, meaning that if a fuse broke a failure LED would turn on and a fuse failed output activate.

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Status panel for the Rack Box project

To get a sense of that was happening in the rack box project, and to be able to manually control stuff, I built a status panel that I had on my desk in the old apartment. It had LEDs, push-buttons and switches for pretty much everything in the rack box; lights, alarms, fan, mute etc. It was made of a desk box with an aluminium front plate, which made it pretty sturdy.

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Fuse box with 4 monitored channels

This fuse box module used to be installed in my rack box project. It had a total of 4 channels, or outputs, each with fuses on both polarities. All fuses were monitored, meaning that if a fuse broke a failure LED would turn on and a fuse failed output activate. In addition to the internal fuses, this module could also monitor an external fuse.

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