Alarm glass of paper of Aluminum (AHF)

Here is a warning of aluminum foil, which is activated when the circuit is opened, or rather break the foil, can be useful to protect windows or any area with glass (glass).

The switches S1 and S2, which are connected in series with AHF should be normally closed, they can be placed on the doors. When activated the alarm can disable the opening S1 (normally closed).

To set the alarm needed a voltmeter or multimeter in 10V DC and connect it through the resistor 1K, adding the circuit, it may be S1 or S2 and adjusts the potentiometer 500KΩ until the voltmeter enter 1 volt. The bell must ring before the voltmeter enter 1 volt, if this does not happen that will revise the circuit and verify that all components are connected correctly. In CN1 connect the cables that connect to the paper Aluminum

list of components Capacitors:
47 µF. 16V
Resistors:
Potentiometer 500K Ω
Resistor 1K Ω
Semiconductors:
Transistor HEP 53
SCR HEP R110
Others:
Ringer or buzzer for 6 volts.
paper of Aluminum.

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