Also found 4 images with this tag.

Module heartbeat monitor with 6 inputs

When my rack box project started filling up with modules, I needed (or rather wanted) a way of monitoring that they were running and doing what they were suppose to. I tried monitoring the fuses (1) (2), but that just wasn’t practical. I needed a way to know that the modules were not only powered, but running. This module does just that.

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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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Module heartbeat monitor with 15 inputs and LCD

As I started putting more and more modules into my rack box project, the previous monitoring module quickly ran out of inputs. I needed to build something bigger and better. I realized that using LEDs to show module status just wasn’t practical as the number of inputs increased. So this unit shows the module statuses on an LCD display instead, and has 15 inputs.

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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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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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