Stepper motors are good for robots, CNC, automation and to move very exact. Transistor Based Stepper Motor Drive Circuit run unipolar motor with logic gates and transistors. It use four 2N2222 to control motor windings, two NOT gates, one XOR gate and to read 2-bit control to turn ON 4 windings. Circuit needs parts like […]
Transistor Circuits
Temperature Based DC Fan Controller Circuit using Transistors
Temperature Based DC Fan Controller Circuit using Transistors turns ON when hot, stops overheating and saves energy. Thermistor checks temperature and runs fan as needed. The circuit works on 12V battery or 12V power supply. Circuit Working: Parts List: Component Type Value Quantity Resistors (All resistors are 1/4 watt unless specified) 1.5k 1 1k 1 […]
Transistor Based H-Bridge Motor Controller Circuit
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. […]
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 […]