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Digital lock 1

2014-11-03 14:00  
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Digital lock 1
The digital lock circuit is composed of the password input control circuit, error closed circuit, reset circuit and control implementation circuit, and it is shown in Figure 3-98. Password input control circuit consists of the buttons Sl-S4, transistors V3-V5, voltage regulator diodes VSl-VS3, resistors R3-R7 and capacitors C2-C4. Error closed circuit is composed of the buttons S6-S10, capacitor Cl, voltage regulator diode VS5, transistors Vl, V2 and resistor Rl. Control implementation circuit is composed of the transistors V6-V8, relay K, diode VD, voltage regulator diode VS4, resistors R9-Rl2 and capacitors C5, C6.