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 […]
Electronic Sensors
Cell Phone Ring to Flashing Lamp Indicator for People with Hearing Loss
The post explains a simple sound to flashing lamp circuit which can be used for facilitating people with hearing loss, so that they are able to visualize a distant cell phone rings through flashing of a lamp, and immediately understand regarding an incoming call in their cell phone. The following explanation and the circuit design […]
Simple Proximity Sensor
In this post we learn how to design your own simple yet useful proximity sensor circuit using a single opamp LM351 and a couple of infrared diodes. Overview A sensor is a device that detects and measures any physical parameter of our environment and converts it into electric signals. There is a long list of […]
Relay Switching by Color Detection
In this post we are going to construct a circuit which can detect color and trigger respective assigned relays. This project is accomplished using TCS3200 color sensor and Arduino board. By Girish Radhakrishnan Color Sensing by TCS3200 If you haven’t read the previous article, please go through it where we have discussed the basics of […]
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 […]
How to Connect an IR Photodiode Sensor
In this post we learn how to correctly connect an IR photodiode in circuits such as a proximity sensor circuit. The explanation is presented in the form a discussion between one of the dedicated readers of this blog NVD, and me. Here’s the discussion which explains how to connect a photodiode in an electronic circuit. […]
Contactless Sensors – Infrared, Temperarture/Humidity, Capacitive, Light
The article discusses a few highly advanced contactles sensors such as infrared sensor, temperature sensor, humidity sensor, light sensor which can be used for crucial and sensitive industrial applications, and manufacturing plants. Texas Instruments (TI) introduced the growth of its industry-leading sensing integrated circuits with the inclusion of 4 innovative products that may empower technical […]
Get this Weather Station Project for Homes and Offices
In this post we are going to construct an interesting Arduino based mini weather station project, which can show you ambient temperature, humidity, pressure, air quality and much more data from your surroundings, which can be used to predict weather from home. By Girish Radhakrishnan If you are interested in meteorology this project might come […]
Intruder Position Indicator Security
The post explains an LED based intruder position indicator circuit which will indicate the position of the burglar throughout the secured corridor as the person tries to sneak past the area.The idea was requested by Mr. Michael. Requesting a Intruder Position Indicator Security Circuit Your articles are nice, well done. sir can this, close and open […]
Material Storage Level Controller
The post discusses a simple material storage level controller circuit which can be used for automatically activating and deactivating a storage filling motor whenever the storage container is filled to its stipulated threshold level. The idea was requested by Mr Sladjan. Laser Beam Controlled Storage Filling I need help with the engine control filling storage […]
Barometric Pressure Sensor – Working and Interfacing Details
In this article we are going to explore, what is a Barometer and how to interface a barometric BMP180 sensor with Arduino. We will also be exploring some of its important specification and finally we will learn how to predict weather using barometric readings. By: Girish Radhakrishnan What is Barometer? Barometer is an instrument for […]
LPG Leakage SMS Alert using MQ-135 – Get Warning Message in your Cellphone
In this article we are going to construct an GSM based LPG leakage SMS alert circuit using Arduino, which alerts the recipient via SMS and surrounding people via beep, when LPG gas leaks out from the LPG cylinder or if there’s leakage due to improperly closed valve. By: Girish Radhakrishanan Using MQ-135 as the Sensor […]
MQ-135 Air Quality Sensor Working and Interfacing with Program Code
In this article we are going to learn how to interface air quality sensor MQ-135 with Arduino. We will see overview of the sensor and construct a project which detects LPG gas leakage and see some relevant readings in serial monitor. By: Girish Radhakrishnan What is MQ-135 sensor? MQ-135 is an air quality or air […]