The beach is always a relaxing summer vacation destination, a great place to drink and read a book or swim in the sea. However, for those who need to use electronic devices for more active beach activities, metal detection is always a popular choice.And, of course, with Arduino and some expertise, you can Build a metal detector that has all the features you can even get from commercial products.
This build comes from us [mircemk] He built this metal detector around the Arduino Nano and used a method called inductive balance detection to find metals. Similar to the working principle of radar, one coil sends out a signal, and the other coil monitors the reflection of underground metal objects. Constructing the coils and determining their resonance frequency is the most important part of this construction. Once it is figured out, the rest of the system can be perfected, and the hidden treasures can be easily unearthed.
One of the more interesting features of this construction is that it can distinguish between ferrous metals and non-ferrous metals, and can detect large metal objects at a distance of more than 50 cm.There are also improvements because [mircemk] It is planned to increase the power of the transmission coil, which will increase the range of the device.For some [mircemk]For other metal detectors, please be sure to check out this detector that uses a smartphone to help the metal detection process.