Simple Alcohol Detector Meter Circuit using MQ-3 Sensor Module

The simple alcohol sensor circuit discussed here will accurately sense the emanation of alcohol gas from a selected source, such as from the mouth of a drunkard, when used as a breathalyzer. It’s cheap and a useful device which can be used by all authorized personnel such as a cops or traffic police for nabbing drunken … Read moreSimple Alcohol Detector Meter Circuit using MQ-3 Sensor Module

Passive Infrared (PIR) Motion Sensor Circuit

The post discuses the pinout details of the standard passive infrared (PIR) sensor RE200B and also explains how to make a motion detector circuit using a single transistor and relay, which can detect the IR radiation from human body and activate the attached relay. What is a PIR PIR is the acronym for Passive Infra … Read morePassive Infrared (PIR) Motion Sensor Circuit

PIR Sensor Datasheet, Pinout Specifications, Working

In this post we are going to explore the datasheet of PIR or Pyroelectric Infrared Radial Sensor HC-SR501. We will understand for what purpose PIR sensor is used? Its basic trigger operations, pin connection details, technical specifications and finally we will be looking at some real life applications. We will begin by understanding the actual … Read morePIR Sensor Datasheet, Pinout Specifications, Working

Using TSOP17XX Sensors with Customized Frequencies

We know that the center or band-pass operating frequency of a TSOP17XX IR sensor is assigned to a particular frequency which makes it difficult to use these sensors for designing unique or customized frequency based remote control circuits. In this post we will try to figure out an idea for enabling these sensors to work … Read moreUsing TSOP17XX Sensors with Customized Frequencies

Introduction to RGB Colour sensor TCS3200 with Arduino

In this post we are going to take a look at RGB color sensor TCS3200, we will understand how the color sensor works and we will be practically testing the TCS3200 sensor with Arduino and extract some useful data. Importance of Color Recognition We see the world every day, filled with rich colors, have you … Read moreIntroduction to RGB Colour sensor TCS3200 with Arduino