NOT gate also name as inverter. It changes from 1 to 0 and 0 to 1. We can make Logic NOT gate circuit with one transistor. Very simple and work with digital signal. It uses very less parts. Output is opposite of input and it works fast. It is useful in digital circuit, computer, electronic […]
Transistor Circuits
Single Transistor Theremin Oscillator Circuit
Theremin is one very old electronic music instrument. It make strange space type sound without touching any part. Human hand move near antenna or plate and the pitch of sound changes. This happen because hand change the capacitance value near the circuit. In this article we will show very small and Single Transistor Theremin Oscillator […]
Headphone Amplifier Circuit using Transistors
Headphone Amplifier Circuit using Transistors make weak sound strong so headphones work well. This circuit is useful when sound is direct from source which is not loud or clear. In this post we talk about small 3V transistor amplifier for better sound. Circuit Working: Parts List: Component Type Value/Specification Quantity Resistors (All resistors are 1/4 […]
High Current 12V Voltage Regulator Circuit using Transistor
Voltage regulators is very important in power supply as they keep voltage steady and even if input voltage changes or load changes. 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 give […]
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. 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 […]
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 […]