Door Lock System Using Arduino And GSM, Wireless Digital Lock
公開日:2022/05/30 / 最終更新日:2022/05/30
Electronic Locks come in numerous sizes and shapes. But the working precept of all of the Electronic Locks is strictly the same. The difference can only be within the voltage and current it requires to energize the coil of the digital lock. Contained in the digital lock is the coil which creates the magnetic field when the desired voltage is utilized.
The SPDT relay has a coil, this coil when energized makes the magnet, one facet of this relay coil is related with the +12 volts and the opposite facet of the relay coil is linked with the collector of the 2n2222 NPN transistor. The emitter of the 2n2222 NPN transistor is linked with the ground whereas the bottom of the 2n2222 NPN transistor is connected with the Arduino or Mega2560 pin number1 thirteen by way of a 10k resistor. This transistor is a BJT “bipolar junction transistor” and that’s why we want a resistor at its base.
Forgetful customers who sometimes come home to an unlocked door will recognize the auto-lock characteristic on this keypad door lock by SCHLAGE. After getting into the code, the door lock mechanically relocks after 5 seconds-optimal Energy-saving switches for hotels busy customers and even older kids who may forget to lock the door behind them. Program as much as 19 codes in this lock.
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