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 […]
Search Results for: pir
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 operation, its technical specifications and finally we will be looking at some real life applications. By Girish Radhakrishnan and Swagatam We will begin by understanding […]
Automatic PIR based Solar Home Lighting
The post explains a simple circuit using PIR, LDR for making an automatic solar LED lamp which can be used for illuminating your home automatically at sunset, and only in the presence of a human member in the premise. By SS Kopparthy Introduction Here, in this article, a simple yet useful and improved version of the […]
PIR Triggered Message Player
In this post we diagnose a PIR activated message player circuit, which was sent by Mr. Norman Kelley one of the dedicated followers of this blog for improvements. Let’s learn more about the design through the following discussions. Triggering Message Playback with a PIR Input I have been working on a project for about a […]
PIR for Detecting Static Human Occupancy
The post explains a method which can be probably used for enhancing a passive infrared sensor ability to detect even a static or stationery human presence. This feature is normally not possible with the conventional PIR sensors. How PIR Detect Human Presence I have already discussed many PIR based motion detector applications in this website, […]
PIR Controlled Fan Circuit for Schools and Colleges
The post explains a simple automatic PIR controlled fan circuit for school college use, which responds and switches ON only in the presence of a human (students) in the classroom. The idea was requested by Mr. Souren Bhattacharya. Technical Specifications I am, souren bhattacharya, a high school teacher in west bengal. To reduce electricity used […]
PIR LED Lamp – Switching LED Lamp on Human Detection
The following PIR LED lamp circuit was designed by me for one of the followers of this blog Mr.Deepak upon his request. The circuit is a LED driver which responds to ambient light as well as to the presence of a human, person or intruder, and varies its illumination accordingly, let’s know more. Technical Specifications “I was looking to […]
7 Modified Sine Wave Inverter Circuits Explored – 100W to 3kVA
The following article presents 7 top modified sine wave inverter designs with exhaustive descriptions regarding its construction procedure, circuit diagram, waveform output and detailed parts lists. The designs are intended for learning and building experimental projects by engineers and students. Here we discuss different varieties of modified designs ranging from a modest 100 watt to […]
Best Engineering Projects for Final Year Students
In this post we sort out a list of most popular, hand-picked and best engineering circuit projects specially created for all aspiring engineers for their final year project exhibition. The circuit projects include the latest and advanced microprocessor Arduino based designs with full program code. The list also includes projects using discrete parts which have […]
5 Simple Inverter Circuits you can Build at Home
These 5 inverter circuits may look simple with their designs, but are able to produce a reasonably high power output and an efficiency of around 75%. Learn how to build this cheap mini inverter and power small 220V or 120V appliances such drill machines, LED lamps, CFL lamps, hair dryer, mobile chargers, etc through a […]
Mini Circuit Projects
The following page shows a comprehensive list of diverse electronic mini projects an circuits which are simple to build using minimum electronic components such transistors, resistors, capacitors and some easily available ICs like IC 555, IC 741, IC LM324 etc. These mini projects are specially designed keeping the new hobbyists in view and so ensure […]
How to Repair a Switch-Mode-Power-Supply (SMPS)
In this post we try to diagnose a burnt SMPS circuit and try to troubleshoot and repair the circuit. The shown unit is a cheap readymade Chinese make SMPS circuit. This article is written as per the request made by Mr. Kesava. My SMPS got Burnt The below attachment is 12v 1.3 amps SMPS for […]
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