Electronic bination Lock | Detailed Circuit Diagram ... This 7 digit electronic combination lock can be easily hard wired for any combination that you choose. The circuit uses a 4 bit, divide by 8 Johnson counter (IC1), ten push button switches and NPN transistor T1. When switch S2 is pressed, transistor T1 conducts and capacitor C2 discharges via diode ... How to Build an Electronic bination Lock The circuit board of the combination lock or the code lock circuit is now ready and just requires a supply voltage from a transformer to start functioning. The testing and the functioning of the above electronic combination lock circuit will be discussed in the next part of the article. Electronic bination Lock Circuit using IC LS 7220 A simple electronic combination lock is designed using IC LS 7220. This circuit can be used to activate a relay for controlling (ON & OFF) any device when a preset combination of 4 digits are pressed. The circuit can be operated from 5V to 12V. The LS7220 IC is a MOS digital lock IC which can ... Simple Code Lock Circuit electroschematics This simple code lock circuit described here is of an electronic combination lock for daily use. It responds only to the roght sequence of four digits that are keyed in remotely. If a wrong key is touched, it resets the lock. The lock code can be set by connectiong the line wires to the pads A, B, C and D in the figure. Simple bination Lock | Digital Integrated Circuits ... Caution! Both the 4001 and 4070 ICs are CMOS, and therefore sensitive to static electricity! This experiment may be built using only one 8 position DIP switch, but the concept is easier to understand if two switch assemblies are used. The idea is, one switch acts to hold the correct code for ... Electronic bination Lock Kit | Electronic Kits Electronic bination Lock Kit CK0210. Soldering required. This Electronic bination Lock Kit is an excellent introduction to security devices. Set your own four digit code; any wrong key in sequence resets the lock; correct sequence activates the relay (up to 240VAC contacts). Simple Key code lock switch circuit using IC 4017 ... This is a key code lock switch circuit, type of electronic circuit. To replace a conventional normal key switch, without inserts keys. But you can press the number code instead of unlocking keys. We do not need to carry a load key, and do not worry about your keys are lost.

electronic combination lock circuit Gallery


electronic lock u2013 circuit wiring diagrams

electronic lock u2013 circuit wiring diagrams

door lock circuit page 3 security circuits next gr

door lock circuit page 3 security circuits next gr

security lock

security lock

simple code lock

simple code lock

4013 circuits

4013 circuits

ls7220 mos digital entry lock circuit circuit diagram world

ls7220 mos digital entry lock circuit circuit diagram world

automotive car and motorcycle schematics circuits and

automotive car and motorcycle schematics circuits and

electric shock circuit

electric shock circuit

pin by ricardo motti on patents

pin by ricardo motti on patents

wiring layout electrical wiring diagram

wiring layout electrical wiring diagram

gsm based home security alarm system using arduino

gsm based home security alarm system using arduino

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