Voltage regulators is very important in power supply as they keep voltage steady and even if input voltage changes or load changes. Also, this circuit give steady 12V output with max 3A current and if current need more than 3A then it still works good for regulation. High Current 12V Voltage Regulator Circuit using Transistor […]
Transistor Circuits
Boost Converter 12V to 120V DC Step-Up Circuit
Boost Converter 12V to 120V DC Step-Up Circuit raises a 12V DC input to 120V DC output; it helps convert voltage levels when required and delivers a high 120V output from a 12V source. Circuit is good for using high voltage from low voltage like battery and output powers to about 100 watts. Here, circuit […]
Digitally Controlled Adjustable Voltage Regulator Circuit
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 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 […]