Simple Phone Transmitter Circuit uses few parts. It take sound from phone talk and changes to signal. Signal goes far using antenna. This circuit is easy to make and works well with landline phone. Circuit Working: Parts List: Category Description Quantity Resistors 10k, 47k, 330Ω (1/4 watt each) 1 each Capacitors Ceramic 47pF 3 Semiconductors […]
Mobile Phone Detector Circuit using Transistors
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. It uses transistors, small switches to catch these signals. Circuit Working: Parts List: […]
Simple Solar Garden Light Circuit using One Transistor
Simple Solar Garden Light Circuit using One Transistor, one special switch and a sun power to turn on LED at night. 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: Category Description Quantity Resistors 1k, 47Ω, 470Ω (1/4 […]
How to Illuminate 18 LEDs from a 3.7V Battery
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! To light all LEDs well we need smart plan. We have to make small LED groups and connect in clever way. Use series in line and parallel in […]
Buck Converter Circuit for 1 Watt LED Driver
Imagine we have a strong water hose of 12V, but plant need soft sprinkle with 3.3V to 3.5V. Buck Converter Circuit for 1 Watt LED Driver is like adapter for hose. It makes pressure low and is good for plant. It also control water flow like current, so plant do not get too much of […]
Simple Buck Converter Circuit for Converting 12V to 3V
Simple Buck Converter Circuit for Converting 12V to 3V also called step-down converter is common in electronics. It takes high DC voltage and makes it lower, like a valve but for voltage. This type of circuits are used in phones and laptops to change 12V battery to lower voltage like 3V for small parts. Circuit […]