If you’ve just received a new metal detector, you’re probably wondering what’s the principle of metal detector circuits.
A metal detector circuit is an electronic circuit that detects the presence of metal nearby, so today we’re going to show you how to understand it.
- A metal detector circuit works by identifying metals and changes the output signal accordingly.
- The principle is based on the fact that metals have magnetic properties.
Metal Detector Circuit:
- The circuit basically uses two coils, one at 90 degrees to the antenna coil, and the other in series.
- The antenna coil broadcasts an electromagnetic field, and the ferrous metal objects obstruct the field, causing a change in the electromagnetic field which acts on the secondary coil.
- The secondary coil produces an output, which is proportionate to the object’s mass.
Disconnect the Battery
- If the battery is connected to the circuit, disconnect it.
- Remove All Components
- Remove every component from the circuit.
- Check for Continuity
- Check continuity between each wire and positive and negative terminals.
- Connect the Battery to the Circuit
- Reconnect the battery to the circuit and check for any improvements.
- You need to make sure that the mode you’re using in the metal detector circuit is the one you want.
- When you set the mode to All Metal, it’s possible that small metal objects like coins and small change pieces will be detected.
- So, try setting the mode to Iron only.
- This looks for a change in impedance.
- Change in Current
This uses current to indicate whether a metal object is present.
- Change in Voltage
This uses voltages proportional to the amount of metal object present.
Change Sound Setting
- Click on Start
- Type Sound in the search field
- Click on Sound
- Under Playback section, click on Playback device
- Under Sound tab, click on Properties
- Under Hardware tab, click on Device usage
- Under Sound playback, select Exclusive mode
- Turn off the device