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Sensors and Detectors

Make this Temperature Indicator Circuit with Sequential LED Display

Last Updated on December 31, 2018 by Swagatam 2 Comments

temperatureindicatorcircuitwithLEDdisplay

In some of my earlier articles we have seen a few simple and interesting temperature indicator circuits, in this article we will try to upgrade one of them into a sequential form. All these circuits are useful in some or the other ways, however these are not equipped with  step wise temperature level indicator arrangement […]

Filed Under: Sensors and Detectors Tagged With: Display, Indicator, LED, Sequential, Temperature

Single IC Piezo Driver Circuit – LED Warning Indicator

Last Updated on December 31, 2018 by Swagatam Leave a Comment

PiezodriverLEDdrivercircuit

The single IC piezo driver with LED explained here can be used as a warning indicator device in conjunction with some sensor for generating an audible as well as a visual indication. How the Circuit Functions The circuit of this piezo cum LED driver, warning indicator circuit utilizes just a single chip RE46C101 from microchip, […]

Filed Under: Sensors and Detectors Tagged With: Driver, Indicator, LED, Piezo, Single, Warning

Simple LDR Motion Detector Alarm Circuit

Last Updated on January 29, 2024 by Swagatam 33 Comments

Here I have explained how to build a simple LDR based motion detector sensor circuit using ordinary parts such as LDRs and opamps, reasonably accurately. What are Motion Detectors Motion detector or sensor alarm is a device which detects the presence of a motion or movement within a certain fixed range and raises an alarm […]

Filed Under: Sensors and Detectors Tagged With: Alarm, Detector, LDR, Motion, Simple

Vibration Meter Circuit for Detecting Vibration Strength

Last Updated on November 20, 2023 by Swagatam 12 Comments

simple vibration meter circuit 1

In this article I have explained a couple of simple vibration meter circuits which can detect and measure the strength of mechanical vibrations. Video Clip demonstrating the Vibration meter working The proposed circuits are built using transistors and also with an IC for getting a bar graph LED sequence for the level indications. The bar […]

Filed Under: Sensors and Detectors Tagged With: Detecting, Meter, Strength, Vibration

9 Simple Metal Detector Circuits Explained

Last Updated on January 2, 2024 by Swagatam 21 Comments

metaldetectorcircuit

In this post I have explained 9 simple metal detector circuits using LC tuned concept, magnetic absorption concept, and the beat frequency oscillator (BFO) concept. The BFO technique is considered to be the most accurate and reliable methods of detecting metals. 1) Metal Detector Circuit Using a Single UJT The first metal detector circuit shown […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Detector, Explained, Metal, Simple

3 Simple Frequency Counter Circuits Discussed

Last Updated on June 5, 2022 by Swagatam 17 Comments

frequency 1

In this post we are going learn how to construct 3 different frequency counter circuits using ordinary components and ICs which will showcase the measured frequency on 7 segment displays. The first circuit which uses 4026 ICs can measure frequencies up to 1 MHz and the circuit is user calibrated.  We will Learn About: Block […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Counter, Discussed, Frequency, Simple

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