This Adjustable 4 LED Flasher Circuit using Transistors is a simple and useful electronics project for beginners which uses two 2N2222 transistors, four LEDs, capacitors, resistors and one variable resistor for speed adjustment. The main purpose of this circuit is to flash four LEDs in an alternating pattern, two LEDs glow first and then the […]
Transistor Circuits
External Current Booster Circuit using Transistor and MOSFET
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 […]
Simple 12V Protection and Soft Start Circuit
There are few protection circuit which we have shown in our previous post, but this article is for Simple 12V Protection and Soft Start Circuit for 12V systems. It helps to protect our load from sudden high current and voltage spikes and also, it gives a smooth start when power turns ON, because of this, […]
24V 2A Zener Transistor Voltage Regulator Circuit
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 […]
DC Voltage Splitter Circuit with Op-Amp and Transistor Buffer
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 […]
Simple Adjustable 5V to 12V Voltage Regulator Circuit using Transistors
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 […]