salva g wrote:
> ok, but can you have a look to this,
>
> http://www.serasidis.gr/circuits/lcd_keys/lcd_keys.htm
>
> do you think it could be impplemented in the TS7800?
> i think that if we go line by line put them low-to-high and then, read
> the switches pressed(of 4), next line and so on...and very very fast!,
> we could have it or (probably) am i wrong?
That is exactly what I described right down to 10k series resistors to
current limit in the case of a short between columns. As I said in my
last message with some careful diode placement you could get away from
the multiple column problem but that's honestly not something I'm
prepared to describe on a mailing list when it's out on the Internet to
be found :)
--
Jason Stahls
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|