Abstract:
To protect electric and electronic device against voltage drop, overshoot, and fluctuation of the main supply, a microcontroller-based circuit is designed. The circuit will keep monitoring the power supply and ensure the main voltage connected to the board feeding the controlled devices if it measures within a required voltage range (RVR). If the voltage falls below or above the RVR then the main supply will be disconnected from the feeding board; the circuit then will keep monitoring the voltage and reconnect it to the feeding board once its amplitude falls back stable in the required voltage range. The design was simulated successfully using Proteus software, but the circuit was not built according to the design due to missing electronic components not found in the market. Nevertheless, the built circuit missing a binary comparator could demonstrate the target functionality of the design by assuming/simulating the output of the comparator
