A Simple metal detector circuit can be made at home on a small scale. In this project, we are going to make a simple metal detector circuit using a proximity sensor. ... 2N2222 Transistor: It is the ...

Described here is a simple metal detector circuit that can detect metallic conductors in its vicinity up to a range of 25 to 30 millimetres. Concealed metallic objects such as metal foils enclosed in ...

If the transistor Q3 is turned on the Red LED will also glow as shown above. Verifying the Circuit using a breadboard: As said earlier, we are going to fabricate a PCB for this Lie Detector Project.

With only one NPN transistor and several passive elements, you can make a relatively sensitive cheap metal detector. The preparation of the device requires... Skip to main content. Ask the publishers ...

You can hear the acoustic note or a variation of the noise on the speaker of your receiver when a metallic object is detected by your metal detector. Obviously you have to correctly tune your receiver ...

A Simple EMF Detector And Electroscope ... The circuits are simple enough that playing with them won ... The MPSA13 has a gain of 10k and 2 of those would be the same as 4 2N2222 transistors.

In the video embedded below, he shows off a homemade voltage detector circuit that he constructed using a trio of BC547 NPN transistors. The circuit is pretty simple though very useful all the same.