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Transistor Circuits

12 Watts Amplifier Circuit using Transistors

Last updated on 15 June 2026 by Admin-Lavi 1 Comment

12 Watts Amplifier Circuit using Transistors make sound louder in audio systems and this 12W amplifier uses op-amp with NPN and PNP transistors. Thus, it gives strong output for 4 ohm speaker. Also, this circuit is good for audio lovers and boost weak sound to loud, which is clear and with good quality. Circuit Working: […]

Filed Under: Amplifier Circuits, Audio Circuits, DIY Projects, Transistor Circuits

Simple Charger Breakdown Alarm Circuit

Last updated on 15 June 2026 by Admin-Lavi Leave a Comment

In electronic system good charger circuit is very important, as it give power to things like battery. Also, this Simple Charger Breakdown Alarm Circuit check charger is working or not and if problem found then buzzer makes sound. So user know fast if charger fails and this stop battery from drain or damage, also it […]

Filed Under: Alarm Circuits, Battery Charger Circuits, Mini Projects, Security and Protection, Transistor Circuits

Simple Short Circuit Detection and Alert System

Last updated on 15 June 2026 by Admin-Lavi Leave a Comment

Simple Short Circuit Detection and Alert System is very important in power system, as it stop damage when short circuit happen. Short happen when positive and negative wire get touch and this make big current flow and can break parts or burn wire. Furthermore, circuit uses 2 transistor, buzzer and LED to find and show […]

Filed Under: Mini Projects, Security and Protection, Sensors and Detectors, Transistor Circuits

Simple 555 Timer Based Transistor Tester Circuit

Last updated on 15 June 2026 by Admin-Lavi Leave a Comment

Transistors are very important in electronics and they make signals strong and turn things ON/OFF and do many jobs, hence, to check if its good then we need to test them. Also, testing helps find problems and broken parts. This article for Simple 555 Timer Based Transistor Tester Circuit which show easy way to test […]

Filed Under: 555 Timer Projects, Meters and Testers, Mini Projects, Timer Circuits, Transistor Circuits

Building an Auto Street Light Circuit using IC 741 and Transistor

Last updated on 14 June 2026 by Admin-Lavi Leave a Comment

This post talks about Building an Auto Street Light Circuit using IC 741 and Transistor, as it turns ON at night and OFF at day. Furthermore, this circuit is simple and saves energy and it uses relay to control light, LDR to sense light, BC547 transistor drives relay and IC 741 works as a comparator. […]

Filed Under: Automation Circuits, Hobby Circuits, LDR Circuits, LED and Lamps, Sensors and Detectors, Transistor Circuits

Simple Transistor-Based Voltage Booster Circuit

Last updated on 13 June 2026 by Admin-Lavi Leave a Comment

In many electronics low voltage is not enough but need only higher voltage, so this voltage booster circuit helps, take low voltage and makes it higher. Also, this project for Simple Transistor-Based Voltage Booster Circuit show how to make voltage booster using simple parts like: PNP transistor 2N2907, NPN transistor 2N2222, resistors, capacitor, diode, inductor. […]

Filed Under: Mini Projects, Power Supply Circuits, Transistor Circuits

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