In this post I have explained a simple deep under soil metal detector circuit for evaluating hidden metals such as gold, iron, tin, brass etc by detecting change in the resistance of the relevant soil layers. Bigger physical objects which might be buried within the topsoil could be unveiled through a modification in the electrical […]
Sensors and Detectors
Digital Up/Down Volume Control Circuit
In this post I have explained a simple digital volume control circuit using the IC DS1668 which can be used in amplifiers and all audio equipment for achieving a push button press up/down volume control facility. What are Electronic Rheostats The DS1668 and DS1669 Dallastats are electronic rheostats or potentiometers. These devices present 64 possible […]
Wheel Rotation Detector Circuit
In this post I have explained a simple wheel rotation identifier or detector circuit which can be used for ensuring a continuous rotating movement of a concerned wheel through an LED, photodiode arrangement. The circuit was requested by nzb109. Technical Specifications I want to generate a trigger circuit to detect that a WHEEL is stationary. […]
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 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, […]
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 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 […]