In this post we explore 9 LDR circuit projects that uses LDR light sensor to trigger a load ON/OFF through a relay. These circuits are mostly triggered by the absence […]
How to Wire a MQ-135 Gas Sensor Module Correctly
MQ-135 is a gas sensor designed to sense or detect gaseous substance and generate a corresponding positive output voltage. In this post we will learn how to connect or wire […]
5 Simple Motion Detector Circuits using PIR
A PIR motion sensor alarm is a device which detects the infrared radiation from a moving human body and triggers an an audible alarm. The post discuses 5 simple motion […]
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 […]
4 Simple Proximity Sensor Circuits – Using IC LM358, IC LM567, IC 555
An IR proximity sensor is a device which detects the presence of an object or a human when it is within a predetermined range from the sensor, through reflected infrared […]
Color Detector Circuit with Arduino Code
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. […]