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555 Timer Working: Specifications And Working Basics

The 555 timer IC is an integral part of electronics projects. Be it a simple project involving a single 8 bit micro-controller and some...

Motion Detector Using NE555 Timer

This circuit is based on a passive infrared (PIR) sensor, which automatically switches on a device when someone comes close to it. It can...

555 Timer Design Using Matlab

Presented here is a Matlab program to design an astable multivibrator of desired frequency and duty cycle using a 555 timer. The aesthetic graphical...

555 Timer PWM Audio Amplifier

The ubiquitous 555 timer IC handles audio signals in its own pulse-width modulation (PWM) way. Here, the 555 IC works in astable mode. The...

IC 555 Timer Tester

This simple and easy-to-use gadget not only tests the IC 555 timer in all its basic configurations but also tests the functionality of each...

False Triggering Eliminator for Timer 555

Normally, false triggering of timer IC 555 takes place during power on, resulting in unwanted output, which starts the timer’s time cycle. The circuit...

Wireless Doorbell

Installing a doorbell in an existing building is a difficult task as it involves wiring that can look shabby if not concealed properly. Presented...

81-LED Chaser Light Using CD4017

This is a simple 81-LED chaser light using two CD4017 decade counters. NE555 timer is used for clock generation for CD4017. We have used...

Wireless Digital Thermometer For Multiple Sensors

A lot of remote sensing thermometers have a problem with measuring more than one temperature at a time. To overcome this problem, a different technique...

Optoreflective Sensor

Here is a simple optoreflective sensor circuit based on TCRT5000 module. It is ideal for projects like robotics, position sensing, proximity sensing, detection of...