Metal Detector Circuit using Single Transistor – Tutorial

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 […]

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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 […]

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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 […]

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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 […]

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