Electronic Bicycle Lock

In the general lock that we use in our day to day life isn’t capable to alarm us when a thief tries to damage the lock and takes away the instrument. The electronic bicycle lock described here is a worthwhile alternative for bicycle owners who want to make their bicycles ‘intelligent’ at reasonable cost. One of the benefits of building it my-self is that the circuit can be used for virtually any make of bicycles.  I think it will be help full for you...

Required instrument:

                                i.            Resister (1kΩ, 2.2kΩ, 270kΩ, 470kΩ)

                              ii.            Capacitor (100uF, 470uF)

                            iii.            Zener Diode (3.1V- 0.5W)

                            iv.            Battery (9V)

                              v.            standard RCA sockets ×2

                            vi.            PCB

                          vii.            tone generator UM3561

                        viii.            Led

                            ix.            Speaker (8Ω-0.5W)

                              x.            Key lock switch

 Circuit diagram: