Switch on off using password

Switch on-off using the password:

This is a circuit to switch on or off using a password. this circuit is so simple to make. here use 4 rotary switches to make passwords. every switch has 10 outputs. every output can make a different number. we can set every output in different numbers as we want. 

 

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transistor circuit diagram of 2sa1943 and 2sc5200

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Build a Transformer or construct the transformer. Home Theater Circuit Diagram 5.1

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