I would like to know the working and functioning of an automatic gate which opens on swiping a card?
143016
It is likely that the card contains a magnetic strip with digital identification data that is read when you swipe it.  If the gate program recognizes your card as authorized to open the gate, a signal is sent to the gate operating mechanism to open the gate (and reclose it after you pass).
998014
Yes, sometimes if you place a key (a regular key, you know, the ones that we all use to open regular doors) over the internet card, it usually covers a wider area. I don't know the exact distance, but at least I saw it working on somebody I know's computer. The wireless card was an external one, I'm not sure if it works for internal cards.
294863
It should clock itself down automatically.  It should work.
482721
http://en.wikipedia.org/wiki/Toggle_Mechanism
783075
If its automated, its a way of making sure your email is a 'live' addres (ie , you use it regularly) so they can track whether or not you've opened it and then add your address to a mailing list for advertising etc.
873368
The actual machine, or the card.  The card is free after approval from your bank.  As for the machine itself, have no clue.
521773
http://www.google.com/search?hl=en&lr=&q=%22automated+email+responder%22+&btnG=Search
449986
cus that is what the door function is
353385
You need some sort of current buffer or relay between the photocell and buzzer. The buzzer operates at a much higher current than the photocell.\n\nA power FET might be useful here with the point which you monitored on the oscilloscope connected to the gate and the buzzer in series with the drain circuit. Many other devices could be used but all will essentially amplify the current available from the photocell circuit. Sorry I can't post a diagram!\n\nAlso, if you need the buzzer to remain activated after the beam continuity is restored you will need to add some sort of timer or latch circuitry.\n\nWK
764855
pls give the name of ur card with details...
1148157
No, most modern vending machines have a one-way flap that lets the coin in but doesn't let it out. It's works something like a rotating human walk-through. Another method employed is to turn the coin by 90 degrees as soon as it enters so that if it is pulled back, it will not be able to come out from the very slot that it went in through. A better technique used extensively in Las Vegas is to keep a series of small Electronic Eyes through the length of the slot, like the human filters in metro stations.
199861
It uses different types of sensors. Some lifts uses a pressure sensor mounted beneath a carpet which senses pressure thus opening the doors. Some uses a pressure sensors on the doors when it is opposed by a smalla pressure it retrets back & opens. Others use a proximity sensors which works with two sensors, one transmittor & other reciever. When the link between the sensors is broken by a person the lift doors open
270099
https://www.barclayspencer.com/asp/main.asp\n\n??? hope this puts you on the right track
9860
You don't say where you are located.. if you are in the UK/Ireland, it will automatically open that way.
863055
it all depends what type of lock it is ,   if it is a "yale" type lock cut a piece of plastic from a cola bottle so you have a curved square piece and slide it between the door and the frame pull it down till you are at the snib of the lock whilst pushing the door. this will work if done properly. good luck. this will save your credit card from being damaged.
1048027
YOU don't USE that one. The merchant/restaurant does. They just SWIPE your card and enter the amount and they get an approval or denial!
732973
If its automated, it depends on the system they have. Most often they look at the address, credit card number, expiration date -- if any of these three do not match your records the system will not accept the card. Check if you got the expiration and credit card number correctly.\n\nWith some shopping cart systems, they have some fraud protection measures and they raise a red flag if your telephone area code is not the same as the area code for your specified address. They also look at the IP address and match it with the address you gave. If they don't match, that's a red flag