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It is known, dear brothers, that converting the radio into a metal detector is done by using a transistor to be a signal transmitter, and the radio can be used to receive the signal. Only the voltage and its parts are available, but today we are talking about a topic that I thought of in order to overcome the defects of instability in the first way, and therefore we need a signal transmitter other than the transistor.
Convert radio to metal detector using ic555
Since the ICSI 555, which is known as the timer, is a signal transmitter that we can control, I thought of sending a signal to the ground through a coil (coil) that is connected to the IC555 output, but first we must know what is the best signal to transmit, and in fact I thought of the same value as the signal sent by the transistor With a difference in shape.
Pieces required in this method:
 a radio containing short wave or am wave
 ic555 with its base (1)
 Capacitor 104 number 2
capacitor 10 micro number 1
 Resistors 390 ohm 1 number and 1 kilo resistance 1
 transistor 2n3904 number 1
 Shi'a (file)
 5 volt battery
Convert your radio into a metal detector
صورة توضيحية لربط الدائرة:
Using AISI 555 to convert your radio into a metal detector

Convert your radio into a metal detector using IC555

Explanatory video
to connect the circuit

Practical and applied video to operate the circuit
Please watch the video of the experiment in the اصنع 
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