king talk

Today I received my birthday present. It´s a Kosmos Xplorer Kit with a metal detector for self assembly. The functionality of this detector is pretty simple. It generates quick electrical fluctuation of the current, a search coil is one part of the oscillator. The number of the vibrations per second (frequency) depend on the properties of the coil. If you hold it close to metal (iron, aluminum, nickel, copper, silver …) the frequency will be influenced by that. A small sensor mounted at the board recognizes this state and sends a signal to a piezo speaker (beep!) and to a red led (blink!). This little and cheap piece of technology looks like it wants to be hacked   ; )