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Science Forum Index » Electronics - Cad Forum » the order in which some switches are turned on
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| laura |
 Posted: Tue Apr 22, 2008 7:19 pm |
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Guest
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Hi all,
I have an array of N switches . Initially all are OFF.
Somebody turns them ON in some order. It is possible that more
switches are turned ON in the same moment.
I need a device which shows me the order in which the switches were
turned ON. For instance the device should give me: 4,3,1,5,2 (this is
the order in which the switches were turned ON).
The way in which the output is shown in not important. It must be
simple to read (by a human, computer, etc).
It is important that the device is able to handle the turned ON (in
the same moment) of the multiple switches.
thanks,
Laura |
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| Geo |
| Posted: Wed Apr 23, 2008 7:44 am |
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Guest
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On Tue, 22 Apr 2008 22:19:45 -0700 (PDT), laura <laura.brandusan@gmail.com>
wrote:
Dismantle an old keyboard and remove the pcb. Connect your switches in place of
the keys. The chip will output them in order off "typing".
If it is a /design/ question then it is essential to state what the minimum time
is between 2 switches being pressed as to if they are pressed together or one
after the other.
Geo |
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