The post explains a simple one transistor metal detector circuit which is very sensitive and and can detect any metal from a significant distance. We are going to begin the topic assuming situations have settled following a few cycles and the voltage within the base of the transistor is steady (fixed by the “retaining” or […]
Detector
Metal Detector for Identifying Metal Pipes, Nails, Cables
This metal detector circuit can be used for tracing out or locating concealed wires, nails, tubes or other similar metallic materials under a layer such as under walls, grounds, basements, wood furniture etc. This gadget functions to identify metals of a specific dimensions from a distance of about 18-20 cm if correctly optimized. One […]
Automatic Darkness Activated Porch Light Circuit
The post explains a simple dark triggered porch light or corridor light circuit using a single IC 741 and few other passive components. This arrangement enables you to automatically switch on your porch lights while when evening stes in or at nightfall. It could additionally be applied to activate the backyard lights at night and […]
Proximity Detector Circuit – LC Tuned IC CS209
The post details an LC tuned proximity detector circuit, using a LC tank circuits and the IC CS209A This is a straightforward proximity switch circuit using IC CS209. The CS209A is actually a bipolar monolithic integrated circuit for use in metal detection / proximity detection purposes. The CS209A consists of an oscillator set up through […]
Metal Detector Circuit using a Single IC
In this post we learn how to make a simplest metal detector circuit using a single CMOS IC 40106 Simple metal detector circuit The metal detection circuit displayed here might reveal the limitations of the simpleness of a metal detector, however the design performs remarkably well. It works with a single 40106 hexadecimal incinerator, a […]
Non-Contact AC Mains Tester Circuit
The simple transistor based non contact AC mains tester circuit will allow you to test the presence of mains AC hum from a distance of about 3 inches. The LED and an optional buzzer will provide the required mains phase presence. How the circuit Works As we can see in the above figure, 3 […]