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.I mean a device that locks or unlocks when when it recieves some current
i'm sorry, my mistake. The circuit is on http://www.circuitstoday.com/wp-content/uploads/2008/02/lock-ls-7220.JPGI'm coupling a 4 digit lock circuit using LS7220 IC's. Please can someone tell me which electronic key powered by the relay to use and how to connect it. From Nigeria
But how does this relate to your original question?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.
If the right combination of keys are pressed, the lock opens and remains open for some seconds and then locks again. [/url]