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Digital lock
- Thread starter Valentine
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Chippie
Member
What is it that you want to lock/unlock?
This will determine the item that is most suitable, if one exists...
It would be most beneficial to all on the forum if you could set out exactly what it is you want to achieve instead of drip feeding information......You are more likely to get help that way..
This will determine the item that is most suitable, if one exists...
It would be most beneficial to all on the forum if you could set out exactly what it is you want to achieve instead of drip feeding information......You are more likely to get help that way..
Last edited:
I'm new to the forum, i don't know how to upload urls. The circuit diagram is on http://www.circuitstoday.com/wp-content/uploads/2008/03/touch-plate.JPG . Please Chippie don't feel i'm stressing you.
Chippie
Member
The link you posted isnt a code lock........Like I said in a previous post...tell us a bit more about what your trying to achieve...
The above circuit link although provides some sort of solenoid function is doesnt have any security in the form of a code lock which is what you originally asked about......
The above circuit link although provides some sort of solenoid function is doesnt have any security in the form of a code lock which is what you originally asked about......
i'm sorry, my mistake. The circuit is on http://www.circuitstoday.com/wp-content/uploads/2008/02/lock-ls-7220.JPG
blueroomelectronics
Well-Known Member
Nope link gives an error.
The entire schematic for the LS7220 is in the datasheet.
The entire schematic for the LS7220 is in the datasheet.
I also have a touch plate and an LDR powered intruder alarm. When they are powered, the alarm turns on first without detecting anything. Is there anything i can do to stop this because, if the system is on and power fails, before it switchs to alternative source of power the alarm goes on. The circuits are on http://www.circuitstoday.com/wp-content/uploads/2008/03/touch-plate.JPG for the touch plate and http://www.circuitstoday.com/wp-content/uploads/2008/03/intruder-alarm-circuit-1.JPG. Again the intruder alarm doesn't respond to normal walking pace.
Chippie
Member
But how does this relate to your original question?
blueroomelectronics
Well-Known Member
Doesn't the safe already have a lock?
The project is to fashion a metallic box-like safe that will be locked with a 4 digit combination digital lock based on LS7220. The key pad should have 12 buttons. (Actually, i'm coupling the circuit, i'm not the inventor). If the right combination of keys are pressed, the lock opens and remains open for some seconds and then locks again. My major constrains are that i can't see the LS7220 and an electronic lock for it in Nigeria. Diagram http://www.circuitstoday.com/wp-content/uploads/2008/02/lock-ls-7220.JPG
blueroomelectronics
Well-Known Member
If you can't get the LS7220 that's a problem. You could try a microcontroller based design but you'd have to learn to program and you may have problems getting that too. Not many businesses will ship to Nigeria.
Chippie
Member
What happens if you dont shut the door before the lock re-engages?
It would necessitate having to re-enter the code....
Not the best of ideas I'm afraid....
The lock mechanism could be a simple solenoid...Can you get one of them in Nigeria?
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