12V Mini Emergency Light Circuit with LDR is simple project to make; here, light gets ON automatically when dark and it works with bright white LED and uses 12V battery. Also, the circuit is good for home, garage and emergency. Circuit Working: Parts List: Components Values Quantity Resistors 10k 1/4 watt 1 2.2k 1/4 watt […]
Hobby Circuits
USB Lamp Circuit for Portable Lighting
USB Lamp Circuit for Portable Lighting is good for portable light, as it is easy to use and takes power from USB port of 5V; also it have rechargeable battery which are more useful. USB port give only 100 mA so use LEDs less and in addition this circuit have transistor, diodes, capacitor, resistors, LEDs […]
Headphone Amplifier Circuit using Transistors
Headphone Amplifier Circuit using Transistors make weak sound strong so headphones work well, also this circuit is useful when sound is direct from source which is not loud or clear. In addition, in this post we will talk about small 3V transistor amplifier for better sound. Circuit Working: Parts List: Components Values Quantity Resistors (All […]
Transistor Based H-Bridge Motor Controller Circuit
Transistor Based H-Bridge Motor Controller Circuit controls DC motor spin both ways like clockwise, anticlockwise. Also, the circuit helps control speed and direction by easy switch method. Name “H-Bridge” comes from shape like letter H which has 4 switches and in this post circuit is 4-transistor H-Bridge. Furthermore, circuit is good for robotics, automation and […]
DIY LED Lamp Circuit using Salvaged Parts from Blown LED Bulb
This DIY LED Lamp Circuit using Salvaged Parts from Blown LED Bulb is cheap and easy project, as it uses stuff people throw away. Here, we will learn how to change broken CFL light to energy saving LED light, also this circuit work direct with 230V AC power with no need of transformer to save […]
Simple 555 Timer Based Animal Repeller Circuit
Simple 555 Timer Based Animal Repeller Circuit is small device to keep animals away, it make high sound which animals do not like and humans mostly do not hear it; also its main part is IC 555 timer which make high frequency sound. Sound is around 15 kHz to 120 kHz (ultrasonic), therefore, this circuit […]