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Step 1: Make the Plate
First get 2 pieces of cardboard and cover 1 side in foil.
Second now get another piece of cardboard and cut out the middle and glue it onto one of the foil sides of the cardboard.
Lastly get some wire and tape a wire to each foil square now tape both sides together.
Now find the connections of the doorbell button and solder the wires from the pressure plate to the doorbell!