Transistor Circuits

First, every electronic project start small, but sometimes current is not enough, so many circuits work fine at 500mA, however real loads like motors, leds and power modules need more current, so instead of redesign full system, we can just boost current using a smart add-on circuit. Next, this External Current Booster Circuit using Transistor […]

This article explain us about a simple 24V 2A Zener Transistor Voltage Regulator Circuit, which converts 230V AC into stable 24V DC output. Moreover, this circuit uses step down transformer, rectifier diodes, filter capacitors, Zener reference and power transistor. Also, this circuit gives good voltage stability even when load changes, because of this output voltage […]

In my previous post I already made a Simple Voltage Splitter Circuit using uA741 Op-Amp, but this time I added transistors so circuit can handle more current and work more strong. This DC voltage splitter circuit with op-amp and transistor buffer change single DC supply into dual supply like +V and –V with one virtual […]

This post is for Simple Adjustable 5V to 12V Voltage Regulator Circuit using TIP31 which uses transformer, bridge rectifier, filter capacitor and transistor control stage. The circuit can give output voltage from about 5V to 12V DC, as it uses TIP31 power transistor to handle load current. We can adjust the potentiometer VR1 to set […]

This High Current 5V 3A Voltage Regulator Circuit gives regulated 5V output with high current capacity. Normal 7805 IC gives around 1A current, but in many projects, this current is not enough, so we add a power transistor to increase current up to around 3A. This circuit also uses bridge rectifier and filter capacitors to […]