Transistor Based H-Bridge Motor Controller Circuit controls DC motor spin both ways like clockwise, anticlockwise. The circuit helps control speed and direction by easy switch method. Name “H-Bridge” comes from shape like letter H which has 4 switches. In this post circuit is 4-transistor H-Bridge. Circuit is good for robotics, automation and other motor projects. […]
Transistor Circuits
Simple Time Delay LED Circuit using Transistor
This article is about Simple Time Delay LED Circuit using Transistor where the LED lit after a short wait. The circuit needs transistor, capacitor and few resistors for delay. It is good for power light, warning light and timing project. It work with 10V DC and fits many electronics. Circuit Working: Parts List: Component Specification […]
Simple 24V Lamp Flasher Circuit using Transistors
Simple 24V Lamp Flasher Circuit using Transistors makes 24V lamps blink back and forth with non stop. It uses transistors to turn two lamps ON and OFF one by one like astable multivibrator. This circuit is good for signal use like warning or decoration lights with steady blink. We must use 24V DC power to […]
Transistors Based Megaphone Circuit
Transistors Based Megaphone Circuit uses transistor like amplifier. Take weak sound from MIC and makes loud sound in speaker. It is used in public talk, sports, rally anywhere we need loud voice. The circuit have two TIP32 transistor in push-pull to boost sound. It work with 12V battery or 12V DC power. Circuit Working: Parts […]
9V Battery Powered Transistor Intercom Circuit
Intercom system is device for talking at short distance. 9V Battery Powered Transistor Intercom Circuit uses 9V battery which is good for home or office talk. It uses only transistors which is easy to understand and works well. The circuit has mic and small speaker as sound. BC547 transistors make sound loud and 2N2222 transistor […]
Transistor Based Battery Heater Circuit
Transistor Based Battery Heater Circuit uses 12V DC with good heat and very portable. Circuit is good for outdoor, no-electric place, small incubator and emergency heat. It uses astable multivibrator with transistors. Transistors switch power transistor and run heat coils. LED show if circuit is working. Circuit Working: Parts List: Component Value Quantity Resistors (All […]