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. […]
Sensors and Detectors
How to Make a Ghost Detector Circuit
In this article I have explained to make a simple ghost detector circuit or a paranormal being detector circuit for quickly investigating a possibly infested area. Introduction Do you believe […]
4 Automatic Day Night Switch Circuits Explained
The 4 simple light activated day night switch circuits explained here can all be used for controlling a load, normally a 220V lamp, in response to the varying levels of […]
Simple Mobile Phone Detector Circuit [Tested]
A cellphone or mobile phone detector is actually a high gain op amp amplifier which detects slightest of RF disturbance from a mobile phone, and illuminates an LED. Mobile phones […]
How to Build a Rain Sensor Circuit
This is a simple rain sensor circuit which can be built by a school grade student very easily and can be used for displaying its relatively useful feature, probably among […]
Non Contact AC Phase Detector Circuit [Tested]
The circuit discussed in this article is of a non-contact mains AC field detector which displays the presence of a mains AC field from a distance of more an 6 […]
