555 timer

Building a 555-Timer based Police Siren Circuit

Upon hearing a siren of a nearby police vehicle, one might think about how this tone is being generated. You’ll be surprised to...

Build a 555 Timer IC based Simple Push-on Push-off Circuit

If you are a hobbyist or have keen interest in electronics circuits, you must be familiar with 555 timer IC and its three...

Build a Simple Motion Detector Circuit using 555 Timer to Control AC Loads

Motion sensor circuits are there on the Internet for quite a while now. These circuits are mainly used to drive AC load (like...

How to Build a High Efficiency Class-D Audio Amplifier using MOSFETs

Audio content has come a long way over the past decades, from a classic tube amp to modern-day media players, technological...

IoT Based AC Fan Speed Control using Smart Phone with NodeMCU and Google Firebase

In this article, we are building an AC Fan Regulator Circuit, which is able to control the speed of the fan by restricting the...

AC Phase Angle Control for Light Dimmers and Motor Speed Control using 555 Timer and PWM Signal

Home automation systems are increasingly gaining popularity day by day, and nowadays it's become easy to turn on & off...

AC Lights Flashing and Blink Control Circuit Using 555 Timer and TRIAC

Sometimes, we might need an AC bulb flasher circuit that can blink a series of bulbs in a particular time interval for...

Positive and Negative Charge Pump Circuit

In a previous article, I have shown you how you can build your own switched capacitor voltage converter circuit using the...

Charge Pump Circuit - Getting Higher Voltage from Low Voltage Source

The situation is simple – you have a low voltage supply rail, say 3.3V, and you want to power something that needs 5V. This is...

Simple Curve Tracer Circuit: Tracing the Curve for Resistor, Diode and Transistor

Most of electronics deals with Tracing Curves, be it the characteristic transfer curve for a feedback loop, a resistor’s...