Remote Door Lock Circuit of an Apartment

Introduction

When it comes to your safety while in your apartment, electric door locks or power door locks are very important. Door manufacturing companies provide their customers with the option of purchasing the electronic equipment of the door with electric door locks. To avoid any mishap, it is better to get this facility installed in the house. Electric door lock provides the residents the freedom of opening of all the doors of the house, as just by pressing a button, the doors open. The best feature of this lock is that the door gets locked once the button is pressed. Electric door locks function through the use of a small electrical motor. Electric door locks consist of a switch, a locking door latch and an electrical controlled solenoid.

The mechanism that opens the car door is quite interesting. The remote lock system is very reliable, as it can lock and unlock the doors of the house for tens of thousands of times. Nowadays, technology has advanced so much that the system itself alerts the person. For example, if a person forgets to lock the door of the house, then the electronic system automatically rings an alarm.

For central locking, the body controller manipulates all potential sources of unlock or signal lock. The monitor gets installed, which opens when the correct code get entered. It controls the Radio Frequency and opens the door after the code number entered in the radio remote control (istalled in the cabin). After receiving the signal from one of these sources, it provides power to the drive, which opens or closes the door.

Working of a Remote Door Lock Circuit of an Apartment Door

When assembling integrated circuits CMOS technology gets used, because they consume much less than the TTL as resting very little current need to work (about 0.6 uA), so you can use batteries to power the circuit (Anderson, pp. 342-367). The circuit diagram of an electronic apartment door gets obtained in the following figure of:

The key '#' (IC2) got used for unlocking the circuit. To perform this is to directly link the key with the output of the gate IC1D. The buttons isolated from “s”, via the diodes D1 - D12. The '*' key (S11) has been used as a reset because RA gets attached to the reset of the mono-stable (Erjavec, pp. 436-451). The encryption module gets identified in the list of components as socket1. The connection module coding is that if the keys are part of the code will join the outputs R1-R5 if they are part of the code (have order, i.e., if the R1 connects the button corresponding to the No. 3, which is the first number of the code) and AR which are not part of the code as this terminal when activated causes the reset circuit.

The design based on a monostable multivibrator, IC1a and Ic1b, and two counter IC2 and IC3 decimal. When the circuit is completely idle, the output / Q (pin 7 of IC1a). At the level is high and ...