Metal Detector with speaker and ttl output.
Features And Usage
- VCC 9v battery
- Logic high out put with common ground.
- Can detect any metal at the range of 1cm to 3cm. you can connect 9v battery to make it handy.
Note: it will not detect coins if it is in the middle of the coil, it may detect if it is close to the coil. it will not detect any type of explosives