Raspberry Pi controlled LEDs

to visualize the up-state of my servers

Posted by Christian Haschek on 22.08.14

A friend of mine who is also a sysadmin recently said to me that if a device he managed went offline, red alarm lights went off in his office.

He meant it as a figure of speech but I thought that would actually be an awesome addition for my server shelf so I would know if there is a problem with the server or one of its virtual machines. I bought a roll of RGB LED strips from Amazon and connected them to a few relays that were controlled by a simple ping script on my raspberry pi.

Here is how it looks:

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This is how it looks if Server 1 has an error but Server 2 is fine. Only after I installed it I realized that the red LEDs are much weaker than the green ones. But it's okay and you can see if fine even if the sun shines in.

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Here are my schematics:

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And the breadboard schematics:

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Tags: breadboard | led | ping script | raspberry pi | relay | rgb-led | server