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How to make a simple Electronic Lock ?

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How to make a simple electronic lock ?

** WARNING: the solenoid will get very HOT after sometime, so design like auto off circuit should be included to prevent over heat of the solenoid.

The solenoid is act as an actuator to unlock the locking mechanism (NOT SHOWN)
The solenoid will be in off state when the combination of the switches is wrong. When the combination of the switches is correct, the solenoid will be activated to unlock the locking mechanism.

To learn more about the schematic you can download free by completing a simple survey or buy it here.