AC Power Interruption Counter Circuit

Simple and easy circuit designed to count the occurrence of power supply interruption. AC Power Interruption Counter Circuit will help us to count the AC power interruption using Seven segment display from 0 to 9 (you can design two digit counter by adding another counter stage) and also we can reset the count when needed. This circuit contains three stage, first one is AC power input stage, second stage is Optocoupler & Johnson decade counter then final third stage is number display.

About CD4033

The CD4033 is a Decade Counter and Divider integrated circuit primarily used in electronic counters and display systems. The CD4033 is a 5-stage Johnson decade counter with a built-in 7-segment decoded display driver. It can count in either direction and has a carry-out feature, making it suitable for various counting applications. Additionally, its ability to directly drive a 7-segment display simplifies the design process in projects requiring numerical output. This IC is often employed in electronic circuits for applications like digital clocks, scoreboards, and other projects where counting and display functions are essential. Integrating the CD4033 into your designs could streamline the development of electronic products involving numerical displays and counters.

Circuit diagram

Construction & Working

First stage of this circuit is getting AC power that need to be counted on interruption, by using polyester capacitor C1 and Bridge Rectifier high voltage AC supply is bring down to low Voltage DC then IC2 (opto coupler detector) MCT2E detects the interruption to the AC supply, this event clock is counted by the IC CD4033 (5 stage Johnson decade counter) and drives the seven segment display LTS543 (Common Cathode seven segment display).

A Reset switch is connected at the pin 15 of IC1, this circuit needs separate DC power source at 9V.

This circuit involves in handling of High AC voltage so take extreme care to avoid lethal shock


MCT2E Pinout

The MCT2E is an optocoupler or opto-isolator device widely used in electronic circuits for signal isolation and interfacing between high and low voltage components. This optocoupler consists of a phototransistor and an infrared emitter, providing electrical isolation between the input and output sides. This isolation helps protect sensitive components from high voltages and noise. The MCT2E is commonly used in applications such as microcontroller interfacing, data communication, and feedback systems where electrical isolation is crucial. Here it is used to couple counter circuit section with AC power line through bridge rectifier.

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