Digital lock 2

Published:2011/8/8 3:36:00 Author:Ecco | Keyword: Digital lock | From:SeekIC

The digital lock circuit consists of buttons S1-S10 (S1-S4 are valid password buttons, S5-S10 are the lock buttons), four RS trigger integrated circuit IC (Al-A4) and resistor Rl. Control implementation circuit is composed of the resistor R2, transistor V, Relay K and diode VD. Rl and R2 use the 1/4W carbon film resistor or metal film resistor. VD selects the lN4001 or 1N4007 silicon rectifier diode. V uses C8550 or S8550, 3CG8550 silicon PNP transistor. IC choosed the CC4043 CD4043 four-RS flip-flop circuit. S0 uses the ordinary power switch.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Electrical_Equipment_Circuit/Digital_lock_2.html

Print this Page | Comments | Reading(3)