555 timer IC

Automatic Light Fence Circuit with Alarm

Light fence circuit is used to detect the presence of any human or object in a particular area. The detecting range of Light...

Capacitor ESR Meter using Oscilloscope

Capacitors seem all fine till you get to the point where a power supply fails or refuses to perform optimally. And if the...

8051 Microcontroller based Frequency Counter

Frequency is defined as number of cycles per second. It can also be defined as reciprocal of total time ‘T’.  In this project...

Thyristor Switching using Snubber Circuit

Snubbers are the energy absorbing circuits used to smooth the voltage spikes caused due to the circuit’s inductance. Sometimes...

Frequency Divider Circuit using 555 Timer and CD4017

Frequency Dividers are the circuits which divide the input frequency by n (any integer number), means if we provide some signal...

Magnetic Door Alarm Circuit using Hall Sensor

Door alarm is a very common and useful device for security purpose. They are used to detect whether the Door is open or closed...

LED Roulette Circuit using 555 timer IC

Here, we are going to show you how to make an LED Roulette Circuit using 555 timer IC, before starting the tutorial let you...

Ding Dong Sound Generator Door Bell Circuit using 555 Timer

Door Bells are available in lot of variations in market which generate different sounds but the most common sound of a Door...

Fridge Door Alarm Circuit using 555 and LDR

The name of the circuit itself infers the application. This circuit triggers the alarm if the door of Fridge is left open for...

School/College Quiz Buzzer Circuit using 555 Timer IC

Quiz is an important event in any school/College institution to test the knowledge of the participants. In order to increase...