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ATtiny13 - PI metal detector

This experimental project shows how to build an AVR microcontroller based simple PI (Pulse Induction) metal detector.

ukasz-podkalickiŁukasz Podkalicki
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  • ukasz-podkalickiŁukasz Podkalicki

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pi Metal detector avr attiny13 attiny

This project was created on 02/18/2019 and last updated 6 years ago.

Description

My goals were to make a circuit as simple as possible and to use only popular / cheap electronic parts. The device has been tested with very small coil (55mm diameter, about 30 turns of 0.5 DNE) and only 3.0V power supply. It’s my first design of PI metal detector and I’m really happy with the results! The prototype was able to detect little coins (6cm distance) and wires in the wall.

Presented metal detector uses PI method to generate a voltage spike in a search coil connected in parallel with capacitor. Next, ATtiny13 uses an Analog Comparator to measure a decay time to zero of resonant circuit. When a metal object nears the loop it will decrease time it takes for the pulse to decay to zero. The change in the width of resonance time is measured to signal the presents of a metal target.

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powiadam.ci wrote 06/19/2022 at 17:25 • point

Idz na całość i zrób taki do wykrywania w ziemi. Wystarczy 50cm. Ale dobrze by było jednak podłączyc do maliny czy innego komputera i użyc sieci neuronowych

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