The circuit explained here employs a rather different approach for implementing a touch operated switch action. Here instead of the resistance, the warmth of the finger is used for sensing […]
Sensors and Detectors
Make this Temperature Indicator Circuit with Sequential LED Display
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 […]
Single IC Piezo Driver Circuit – LED Warning Indicator
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 […]
Simple LDR Motion Detector Alarm Circuit
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 […]
Vibration Meter Circuit for Detecting Vibration Strength
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 […]
9 Simple Metal Detector Circuits Explained
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 […]