Digitally Controlled Adjustable Voltage Regulator Circuit provides an adjustable output voltage for different applications; also the popular LM317 regulator IC delivers an adjustable output voltage ranging from 1.25V to 37V. Furthermore, in this circuit LM317 IC work with digital control transistors and let user choose voltage easy; it is also good for different voltage need […]
Transistor Circuits
Transistor Based Stepper Motor Drive Circuit
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 and 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. Also, circuit needs […]
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, then thermistor checks temperature and runs fan as needed. Also, the circuit works on 12V battery or 12V power supply. Circuit Working: Parts List: Components Values Quantity Resistors (All resistors are 1/4 watt unless specified) 1.5k 1 1k […]
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 […]
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; also the circuit needs transistor, capacitor and few resistors for delay. In addition , the circuit is good for power light, warning light and timing project and it work with 10V DC and fits many electronics. […]
Simple 24V Lamp Flasher Circuit using Transistors
Simple 24V Lamp Flasher Circuit using Transistors makes 24V lamps blink back and forth with non stop, as it uses transistors to turn two lamps ON and OFF one by one like astable multivibrator. Also, this circuit is good for signal use like warning or decoration lights with steady blink, therefore, we must use 24V […]