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AC 220V Over Current Monitor and Cut OFF Circuit

Last Updated on January 1, 2024 by Swagatam 12 Comments

220V load circuit breaker track side PCB

The proposed AC mains 220 V load over current cut off circuit continuously monitors the current flowing through a connected load. If this current increases beyond a certain preset level, the circuit trips the relay and disconnects the load from the AC. Basic Working This 220 V over current cut off circuit is indeed subject […]

Filed Under: Security and Alarm Tagged With: 220V, AC, Current, Monitor, OFF, Over

ON/OFF Relay Switch Circuit using Reflection Sensor

Last Updated on May 13, 2023 by Swagatam Leave a Comment

ON OFF switch circuit using IR reflection sensor CNY70

This 220 V ON/OFF electronic relay switch can be toggled ON/OFF simply by alternately bringing your finger close to the reflection sensor CNY70. About CNY70 CNY70 is an infrared reflecting sensor comprised of an infrared emitting diode and a phototransistor housed in a tiny plastic container. The sensor operates by generating infrared light and sensing […]

Filed Under: Sensors and Detectors Tagged With: OFF, ON, Reflection, Relay, Sensor, Switch

Delay OFF Lamp Timer Circuit

Last Updated on November 25, 2023 by Swagatam Leave a Comment

delay off lamp timer circuit

This delay off lamp timer circuit will automatically switch OFF a connected lamp after a predetermined time has elapsed. This time delay can be adjusted with a variable resistor or a potentiometer. The circuit is initiated by pressing a push button, which causes the connected lamp to switch ON. The lamp will continue to remain […]

Filed Under: Timer and Delay Relay Tagged With: Delay, Lamp, OFF, Timer

Clap Switch Circuits with Relay ON/OFF: [Tested]

Last Updated on April 7, 2025 by Swagatam 215 Comments

clapswitchcircuit

The clap switch circuits explained here will toggle a connected load ON and OFF in response to alternate clap sounds? Here I have explained 4 unique and simple designs which can be selected as per user preference. The article talks about what the title suggests – a clap switch. A small electronic circuit when built […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Clap, OFF, ON, Relay, Switch

Password Controlled AC Mains ON/OFF Switch

Last Updated on December 5, 2024 by Swagatam 1 Comment

LCD bb

In this post I will show how to construct a password based mains ON/OFF switch circuit, which can turn ON and OFF the AC mains supply, only when correct password is entered. This prevents the danger of electrocution of the technician who might be currently working with the high voltage lines and equipment. Password Protection […]

Filed Under: Arduino Projects Tagged With: AC, Controlled, Mains, OFF, ON, Password

Controlling LED Strip Light ON/OFF and Brightness with any Remote Control

Last Updated on January 4, 2024 by Swagatam

LEDstripdimmer

In this post I will show how to construct LED strip controller circuit using Arduino, which can turn ON/OFF and decrease/increase brightness of LEDs using ordinary IR (Infrared) remote. What is LED Strip Light? (For noobs) If you are not familiar with LED strip lights, let’s understand what it is. LED strips (sometimes called as […]

Filed Under: Lamps and Lights, Remote Control Circuits Tagged With: Controlling, LED, Light, OFF, ON, Strip

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