Metal detector circuit using 555

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

https://www.circuits-diy.com/simple-metal-detector-circuit/

• NE555
• 170 turns, 10 cm diameter
• 2.2uF x 2
• 47k

https://www.instructables.com/Make-a-Metal-Detector/

• 555
• 28 AWG wire, 220-250 turns, diameter 1 inch
• 2 x 1 uF, 3 x 10 uF
• 47 kOhm