[svlug] RS-232 electronics help wanted

R P Herrold herrold at owlriver.com
Fri Jan 18 21:26:02 PST 2002


On Fri, 18 Jan 2002, William R Ward wrote:

> 
> Trouble is, the barcode scanner won't talk to my laptop, because the
> laptop's serial port uses RS-232 voltags (+/- 12V) and the scanner
> uses TTL voltags (0/5V).
> 
> When I was in high school I had a friend who showed me how you can use
> 1488 and 1489 chips to do this kind of thing.  But electronics was

First hit at google with  RS-232 at 1489    looks perfect


http://www.angelfire.com/fl3/technicothica/ttlrs232.html





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