Subject:
|
Re[4]: phone cord length
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Wed, 5 Mar 1997 08:17:56 GMT
|
Original-From:
|
Richard Whitehead <RICHARD.WHITEHEAD@nomorespamUKOS.VARIAN.COM>
|
Viewed:
|
1632 times
|
| |
|
|
Ooops, You're right of course!
Richard
______________________________ Reply Separator
_________________________________
Subject: Re: Re[2]: phone cord length
Author: tomb@netperceptions.com at Internet-Mail
Date: 04/03/97 13:03
> TTL does NOT go down that line, it is RS232 which is commonly used at
> up to 50 feet. However, you might need to use a shielded cable if you
> use a lead longer than about 10 feet.
On the phone cord between the handy board and the charger/interface
card, the signal voltage is TTL levels. There is also charge voltage,
and ground in the other wires.
RS232 level conversion is done by the MAX232 on this card.
|
|
1 Message in This Thread:
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
