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Tagged with security digital-logic
3
questions
0
votes
1
answer
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LS7220 passcode IC
I bought the LS7220 IC which is designed to check passcodes.
For some reason, the pin 8 Lock Status Output does not illuminate the LED when I connect the power, and when I bridge the VCC in sequence ...
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0
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LS7220 IC question for HIGH and LOW
I am learning about the basics of electronics.
I bought an LS7220 chip for a keypad lock, but using it turned out more difficult than I expected. I have attached it to a 9v battery at pins 9 and 14, ...
- 253
1
vote
1
answer
6k
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Creating a logic function of a burglar alarm system for a bank
This is the problem from homework that I am stuck on:
A burglar alarm system for a bank is to be operative only if a master
switch at the police station has been turned on. Subject to this
...
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