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Mobile Phone Detector Circuit using Transistors

Last updated on 4 June 2026 by Admin-Lavi Leave a Comment

Imagine we have a spy device that finds nearby mobile phones. Mobile Phone Detector Circuit using Transistors is like ear for special signals phones send to towers; it can catch signal even before phone rings like secret talk between phone and tower. Also, it uses transistors, small switches to catch these signals. Circuit Working: Parts […]

Filed Under: DIY Projects, Security and Protection, Sensors and Detectors, Transistor Circuits

Simple Solar Garden Light Circuit using One Transistor

Last updated on 4 June 2026 by Admin-Lavi 2 Comments

Simple Solar Garden Light Circuit using One Transistor, uses one special switch and a sun power to turn on LED at night. Also, when sun goes down the light turns ON by itself and when sun come back the light turns OFF, like a magic! Circuit Working: Parts List: Components Values Quantity Resistors 1k, 47Ω, […]

Filed Under: Battery Charger Circuits, DIY Projects, LED and Lamps, Solar Circuits, Transistor Circuits

How to Illuminate 18 LEDs from a 3.7V Battery

Last updated on 4 June 2026 by Admin-Lavi Leave a Comment

In this post for How to Illuminate 18 LEDs from a 3.7V Battery we need to power 18 LEDs with 3.7V battery like a small light party! Also, to light all LEDs well we need smart plan; we have to make small LED groups and connect in clever way. So use series in line and […]

Filed Under: DIY Projects, Hobby Circuits, LED and Lamps

Buck Converter Circuit for 1 Watt LED Driver

Last updated on 3 June 2026 by Admin-Lavi Leave a Comment

Imagine we have a strong water hose of 12V, but plant need soft sprinkle with 3.3V to 3.5V, then in that case a Buck Converter Circuit for 1 Watt LED Driver is like adapter for hose. Also, it makes pressure low and is good for plant and it control water flow like current, so plant […]

Filed Under: DIY Projects, LED and Lamps, Power Supply Circuits

Cable Tracer Circuit

Last updated on 3 June 2026 by Admin-Lavi Leave a Comment

Cable Tracer Circuit is of two part device, which help find and check right cable in group or inside wall. Also, it have two parts: transmitter and receiver and mostly people use it in telecom, network, fixing wires, security system and audio/video setup. Circuit Working for Cable Tracer Transmitter Circuit: Parts List: Components Values Quantity […]

Filed Under: DIY Projects, Meters and Testers, Transistor Circuits

Sound to Light Converter Circuit

Last updated on 3 June 2026 by Admin-Lavi Leave a Comment

In this article, the Sound to Light Converter Circuit changes sound into light, as a result, it listens to music and makes the lights flash in sync with the beat. Furthermore, smart components inside the circuit convert changes in sound volume or pitch into variations in light brightness or flashing speed. Circuit Working of Sound […]

Filed Under: Audio Circuits, DIY Projects, LED and Lamps, Transistor Circuits

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