We can make Single Push Button ON OFF Relay Circuit with one push button to control motor or light. Press button and relay will turn ON. Press again and relay will turn OFF. No need of microcontroller or timer IC. Use only some transistors and one capacitor. Circuit Working: Parts List: Component Type Description Quantity […]
Transistor Circuits
100 Watt Audio Amplifier Circuit using Transistors
This 100 Watt Audio Amplifier Circuit using Transistors make sound loud. It uses transistors to give 100 Watt power to speaker. Input is small audio signal in which circuit boost and drive big speaker. Circuit is good for music system, home theater and for party sound. Circuit Working: Parts List: Category Description Quantity Resistors (All […]
Simple Single Transistor Audio Amplifier Circuit
Name say it, this is very Simple Single Transistor Audio Amplifier Circuit. It make sound signal bigger means amplify. Good to learn how transistor work and how amplification happen. Want to build easy audio amplifier? No need of many parts? This one transistor circuit is good choice! It uses common parts like resistor, capacitor and […]
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 […]
PWM Motor Speed Control Circuit using Two Transistors
Resistors can help in some ways but they are not good for smoothly changing motor speed. That is why a smart PWM Motor Speed Control Circuit using Two Transistors is used. It works like a dimmer switch for the motor. We turn a knob like a potentiometer to change how much power the transistors get. […]
Microphone Preamplifier Circuit using Two Transistors
Imagine our voice is a tiny whisper going into a microphone. This Microphone Preamplifier Circuit using Two Transistors works like a small megaphone. It makes the whisper louder so the main amplifier can clearly boost our voice. Circuit Working: Parts List: Component Type Description Quantity Resistors(All resistors are 1/4 watt unless specified) 100k 1 120k […]