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Author: Mangapathi
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Infrared (IR) Proximity Sensor / Object Detector
This project explains how to build a simple, reliable Infrared (IR) Proximity Sensor circuit at home. This sensor detects the…
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220V AC Power Supply Detector using the CD4017
This project outlines how to build a basic 220V AC Power Supply Detector that uses the popular CD4017 Decade Counter…
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Battery Level Indicator (3V-25V)
This project details how to build a wide-range Battery Level Indicator circuit capable of monitoring battery voltage from approximately 3v…
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Remote Control Light/LED: Wireless Switching for Home Automation
This project demonstrates how to build a simple electronic circuit that allows you to control a light source (like an…
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Simple Audio Amplifier / Mini Speaker
This project explains the fundamental principles and construction of a simple, low-power Audio Amplifier circuit, often used to drive a…
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LED Chaser Circuit: Creating Moving Light Effects
This project outlines how to build a classic LED Chaser Circuit, often called a moving light effect or sequencer. This…
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Non-Contact AC Voltage Detector using the BC547 Transistor
This project describes how to build a simple, non-contact AC Voltage Detector. This device can sense the presence of AC…
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Touch Switch using the BC547 Transistor
This project explains how to build a highly sensitive Touch Switch circuit that uses the low electrical current conducted by…
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Music-Reactive Lights
This project describes how to build a simple Music-Reactive Light. A music-reactive light is a fun circuit where LEDs light…
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Light Sensor (Darkness Detector)
This project helps to automatically turn ON a light or LED when it gets dark and turn it OFF when…