Metal detector circuit using 555
From wikiluntti
Introduction
A simple and short summary of metal detector circuits and the parts used in those.
Circuits
Speaker, battery and wires are not included in these lists.
https://www.electronics360.org/how-to-make-a-powerful-metal-detector-circuit-using-555-timer-ic/
- NE555
- 100mH/ 24AWG
- 10 muF, 2.2uF
- 47kohm
https://theorycircuit.com/ic-555-ic-741/simple-metal-detector-circuit-using-ic-555/
- NE555P
- 100 turns, 6 cm diameter
- 1uF, 0.01uF
- 100kohm
