Friends, here we are talking about printing a metal detector circuit with excellent depth, and this circuit appears for the first time on the World Wide Web.
We start with cutting, which is as follows: 1- Transistor 2n3904 number 3
2 - capacitor 104 number 4
3 - Capacitor 1 microfarad 25 volts number 1
4 - A copper printing plate, the size of which is not less than 5 cm * 7 cm
5- A calligraphy pen, any color will suffice, God willing
6 - ic 555 with its base number 1
7 - table salt 10 g
8 - lemon salt 20 g
9 - Hydrogen peroxide for hair is sold in pharmacies and is cheap. The box is sold for approximately one dollar
The circle is drawn on the copper plate, either by direct drawing or by printing on glossy paper or on butter paper, and we have a method for that that can be followed by those who love in the channel, and after drawing the circle carefully and in a clear line on the plate, the materials are mixed in a plastic box where an amount of 50 ml is added From water to the empty plastic container, then add 10 grams of table salt to it, then add to the same container 20 grams of lemon salt, then 12 grams of hydrogen is added to the box, then the circle we drew is placed inside this mixture for about an hour.
After the hour, if the quantities are correct, all the copper will be melted, God willing, except for the copper under the lines. Then we start cleaning the plate with nail polish remover acetone, and it is removed quickly and without obstacles, God willing, and then we start installing the pieces on the circuit, with God’s blessing.
I want to note that the pieces can be installed directly on the circle without drilling, as I did in the video, and the circle can be perforated with a drill for those who want that. Here are the detailed photos.
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