Programmable RGB Thermometer

PCBway: only $5 for 10 pcbs from https://www.pcbway.com/?from=CZcouple

Summer has been relentless this year. My passion for #Bitcoin mining took a major hit due to the immense heat from my miners and the electricity costs required to keep them cool and running. There were times when the miners #overheated so badly that I had to shut them down "manually" to prevent a fire hazard.
To automate the shutdown and restart process and to enable remote #temperature monitoring, I built an RGB thermometer with its own web interface that can control home appliances based on temperature changes.

Watch this video, for detailed step by step instructions on how to build this circuit and to know how this circuit works.

Direct Aliexpress Links
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ESP32-C3 Super Mini : https://s.click.aliexpress.com/e/_omnke4z
WS2812B : https://s.click.aliexpress.com/e/_c4oOdHi9
DS18B20 : https://s.click.aliexpress.com/e/_c3oKzGsz
4.7K Ohm : https://s.click.aliexpress.com/e/_c3jMGVWl
Relay Modules : https://s.click.aliexpress.com/e/_c3pdcpop

Thanks
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Thanks again for checking my post. I hope it helps you.
If you want to support me subscribe to my YouTube Channel: https://www.youtube.com/@CrazyCoupleDIY

Video: https://youtu.be/WecOhmHxspg
Full Blog Post: https://diyfactory007.blogspot.com/2026/01/RGBThermometer.html
Gerber:
Github:

References
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All About PC817 Optocoupler: https://www.youtube.com/watch?v=Rj9H0beMQq8
DIY Relay Module: https://www.youtube.com/watch?v=3n69b4sdDjk

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Thanks, ca again in my next tutorial.