Over and Under Voltage AC Protection Circuit: How to build an Over/Under Voltage protection circuit

This is an OVER VOLTAGE / UNDER VOLTAGE AC POWER PROTECTION SYSTEM. The project is completed and it's working just fine as per designed.


We have taken through detailed process to explain the working principle of the project, as we have presented the design information, coupled with the complete circuit diagram, and you can find all these via the the link below,
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The system, works in the same topology to a simple house stabilizer, the distinction from a stabilizer is that the system, detects either Over voltage(280V AC) or Under Voltage (140V AC) and automatically cuts the output power, and as such restricting a user to have their gadget expose to such High voltage or Low Voltage which is dangerous for an electronic gadget.

The system is built within a simple assembly of discrete Electronics components, and with the complete circuit analysis we presented on the video, one can actually develop one.

For the demonstration, we used a generator to test the system, and as you can see from the pictures attached, immediately the voltage goes above 280V the Red LED indicates that, as the output socket is cut off, while once the voltage goes below 140V AC, the Yellow LED indicates that and as well flips the output line.
The green LED indicates the voltage range of 140v-280v which we consider as the normal voltage ( This values were used according to the requirements of the project proposal) and only when the Voltage is normal, can a user have there gadget powered and as such, provides an additional protection to an AC power gadget.

This project is one , you can even build for use, and that is ultimately why we indicated the limitations on the video.

Be sure to check out the video demonstration, and give us your feedback on the design.