The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "Matt Foster"
Subject: Re: RS232 newbie - in need of assistance!
X-Newsreader: Microsoft Outlook Express 6.00.2720.3000
Date: Thu, 02 Jan 2003 21:40:01 GMT
NNTP-Posting-Date: Thu, 02 Jan 2003 21:40:01 GMT
Organization: blueyonder (post doesn't reflect views of blueyonder)
Interesting .. give me a starting point!
"Brett" wrote in message
> I would try and use the parallel port. RS232 is annoying in two ways. It
> uses > (+5V) for high and < (-5V) for low. (Though in really cheap designs
> you could get away with 5V high and 0V low.) The second problem with RS232
> (actually not RS232 here but rather UART) is the protocol. It uses a
> data stream. That wouldn't be so bad, if it weren't for the lack of a
> (as in each end has to know the right speed to read the data stream). In
> case, there are a small number of general purpose IO (I guess you could
> them that) that sends/receives status information. You could take those
> lines and possibly divert them for your own purposes! (PonyProg programmer
> dongle uses this, as it is pretty darn cheap and effective.)
> "Matt Foster" wrote in message
> > Hi,
> > I am an A-Level student looking to read computer science at university
> > the coming years.
> > As a project I am trying to design a circuit that transmits data to the
> > pin serial port (RS232) of a standard PC.
> > As a basic start I am trying to make a circuit with 4 ptm switches, when
> > press switch 1 I would like to display "switch 1" or somesuch on the
> > computer screen. The same for switch 2,3 and 4.
> > I will be using VB and the MSCOMM control to access the serial port, and
> > forsee no problems with doing this. My hurdle, however, is sending the
> > 'data' from the PCB to the serial port.
> > I would be extremely appreciative of any help you could give me.
> > Thank you very much for your time.
> > Matt Foster
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.434 / Virus Database: 243 - Release Date: 25/12/2002
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.434 / Virus Database: 243 - Release Date: 25/12/2002
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup