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antenna (copper wire)

3 transistors

3 resistors

1 LED

9V battery

breadboard

kannatlikkus

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Connect 9 Volt battery wires in last holes on white breadboard.

red ........... +

black ....... -

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Make antenna out of 30 cm long copper wire. Shape could be different.
Be shure to peal off the insulator on one side of copper wire. This side goes to breadboard.
Pin it in 2nd row (see picture).
Let antenna be out of breadboard.

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Pin transistors connects in rows number 1,2 and 3.

1 MOhm resistor should be in row number 1 and  + column.

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Put the transistors connects in rows 11, 12 and 13.

100 kOhm resistor connects transistor in row 11 with  + column.

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Same job, but this time for transistor we use rows 20, 21 and 22.

220 Ohm resistor is connecting 20th row with 20th row on other half (look at the photo closely)

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LED (light emitting diode) connect with shorte leg in 20th row and longer leg in + column.
Also connect transistors with wires as shown at photo.

1st wire... rows 3 and 12

2nd wire...rows 13 and 21

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GND or ground or minus.....
Use shortest wire to connect 21st row with  -  column.

You are finished.

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You can fix battery to a breadboard with a rubber.

Now use your sensor...

Finished !!!

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elektritakistus - 1000000 Ohm

Colors:
brown, black, green, gold

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elektritakistus - 100000 Ohm

Colors:
brown, black, yellow, gold

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elektritakistus - 220 Ohm

Colors:
red,  red,  brown,  gold

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Today we should make a non-contact AC Voltage detector :