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RS232
Sci.Electronics.Design is a worldwide Usenet news group that is used to discuss various aspects of Electronic Circuit Design.
We found 184 threads matching "rs232"
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Windows RS232 monitor
mkr5000 - 2008-05-15 08:52:00
Does anyone know of a simple program to look at a PC's RS232 port?
There are so many on Download.com, I don't know where to start.
I need one that will display each byte in it's binary form on the
screen. (Many are ascii).
Doesn't need to communicate, just display the received data.
Thank...
any suggestion to improve RS232 Signal Quality?
Myauk - 2009-10-08 04:14:00
Dear All,
Could anybody suggest me what are the possible ways to improve the
signal quality of 5 ft long RS232 Serial line at Baud Rate 115200?
I posted a question asking on flash programming failures via RS232
Serial Link, a few days ago.
Here are more details on the issue.
The connec...[OT?]When an USB to RS232 converter is not "transparent"? DTR DSR loopback?
blisca - 2008-03-08 01:45:00
I have to solve this ..by phone!,i need your help,or your hints.
There is a little application done in VB that reads and sends data to a
board using the MSComm object.It works fine on a Pc with its RS232 serial
port.
As noticed newest laptops has plenty of USB's but no RS232 ports.
So a USB...A cheap very accurate LC meter with RS232 interface
Jan Panteltje - 2010-08-11 10:35:00
A cheap ( < 10 $) very accurate LC meter with RS232 interface.
http://panteltje.com/panteltje/pic/lc_pic/
All credit goes to somebody else (actually a lot of people) for this design.
I merely simplified it some more :-)
It seems to be very accurate, and is most useful if you are winding you...A cheap very accurate LC meter with RS232 interface
Jan Panteltje - 2010-08-20 18:02:00
Update
A cheap ( < 10 $) very accurate LC meter with RS232 interface.
http://panteltje.com/panteltje/pic/lc_pic/
Updated the website, added an explanation how it works, derived the equations for Cx and Lx,
and updated the software.
...RS232 autoranging frequency counter update
Jan Panteltje - 2009-09-04 12:23:00
RS232 autoranging frequency counter update.
Added input cap, and build it into a D connector,
photos here:
http://panteltje.com/panteltje/pic/freq_pic/
Bet his is the smallest frequency counter on earth :-)
...Breaking the price barrier: An autoranging frequency counter with RS232 output
Jan Panteltje - 2009-08-28 15:24:00
I found a nice auto ranging frequency counter online here:
http://freenet-homepage.de/dl4yhf/freq_counter/freq_counter.html
Did not have those 7 segment displays, considered an LCD interface,
but why not use RS232, and power it from the RS232 too?
Just a probe you can bring along with your la...An other PIC project: Add 8 analog 10 bit inputs, 2 digital inputs, 5 digital outputs, 1 PWM to your PC via RS232, for < 10$
Jan Panteltje - 2008-01-06 11:06:00
An other PIC project:
Add 8 analog 10 bit inputs, 2 digital inputs, 5 digital outputs, 1 PWM to your PC via RS232
And all that for less then 10$
OK:
http://panteltje.com/panteltje/pic/io_pic/index.html
Just some asm code to add some decent IO to your PC.
...blown serial ports
John Larkin - 2010-01-30 13:56:00
I keep zapping serial ports on my HP ProLiant boxes. In one case, I
had an external gadget that applied +12 to one pin, DSR or something,
and I blew both serial ports before I figured out what was happening.
In another case, what was probably a line spike or lightning strike
(associated with a l...Re: Eagle on the eeePC, or is it only virtual? pictures :-)
MooseFET - 2008-06-04 09:25:00
Slightly off topic:
If you install "dosemu" on an eeePC, you can run DOS programs.
If you plug in a Keyspan USB to RS232 device, (The single port one)
you see a /dev/ttyUSB0 serial port.
If you set the "dosemu" to use the USB port as COM1, programs like
"commo" and "procom" will run and...Re: PIC 18F22K14 as class D audio output amplifier, 2 components...
Jan Panteltje - 2010-02-27 11:35:00
On a sunny day (Fri, 26 Feb 2010 19:24:12 GMT) it happened Jan Panteltje
wrote in :
> PIC 18F22K14 as class D audio output amplifier, 2 components...
>
>
> I have updated the asm file, this the latest one:
> ftp://panteltje.com/pub/audio_pic/
>
> This is now a little universal mod...SPI to RS232 Conversion
Artist - 2009-07-11 21:27:00
I want to use the MAX9939,
http://datasheets.maxim-ic.com/en/ds/MAX9939.pdf,
on a board with no uP and control it instead with an RS232 serial port
from a PC. I thought at first I could do this with the MAX3110E:
http://datasheets.maxim-ic.com/en/ds/MAX3110E-MAX3111E.pdf
but after reading this...Replace MAX232CPE With FTD chip
Anti-Spam - 2010-09-02 15:30:00
Probably been covered a thousand times in this forum, but have been
doing other things for quite a few years now. I designed many years
ago some Serial interface boards using the MAX232CPE RS232 chip. I
have been asked by the owners of the product to change these to USB
connectivety. The FTD chi...Re: Windows XP startup question
Jan Panteltje - 2009-12-27 14:58:00
On a sunny day (Sun, 27 Dec 2009 19:53:20 GMT) it happened Jan Panteltje
wrote in :
> On a sunny day (Sun, 27 Dec 2009 10:58:52 -0800) it happened Joerg
> wrote in :
>
> > John Larkin wrote:
> > > Hi,
> > >
> > > I'm writing a program that I'd like to have started every time...Re: USB spectrum analyzer
2009-10-04 18:21:00
Ok, this is rs232, not usb, and out of my budget at 250 euros, but
getting closer.
http://www.weaksignals.com/
click on hardware and there is a 0-30 mhz drm receiver.
Steve
...Re: why ?
John Tserkezis - 2007-12-28 20:17:00
Jamie wrote:
> Have you ever noticed if you have something out of the ordinary
> for tools that is very usefull,and one day when you get ready to use
> your little tool that you know you once had and can't find it.
Yeah, that's "normal".
> This seems to happen a lot when working ...Re: uP hobbyist kits
Tim Watts - 2010-02-05 03:19:00
JosephKK
wibbled on Friday 05 February 2010 03:11
>
> I am looking for enough kit to do maybe two or three projects for PIC and
> AVR.
> Target price, about $100 for each vendor. Works in Linux or Linux/wine
> preferred.
> Also some small LCD displays if not included. I can go...A cheap very accurate LC meter with RS232 interface
Jan Panteltje - 2010-08-13 18:39:00
Update
A cheap ( < 10 $) very accurate LC meter with RS232 interface.
http://panteltje.com/panteltje/pic/lc_pic/
As suggested by others.. a bigger range would be nice.
I rewrote some of the asm to actually report the 3 frequencies as
well as the C and L value calculated.
That asm file is av...Re: A case for a dongle/adaptor
Eeyore - 2008-01-01 06:10:00
Arlet Ottens wrote:
> Eeyore wrote:
> > Ben Jackson wrote:
> > > On 2008-01-01, Eeyore wrote:
> > > > You know the thing I mean ?
> > > >
> > > > A plastic case that allows 2 x 25 way D-subs (or a 25 way D and some
> > > Beware that printer ports are becoming ever more r...Re: Laptop-based TDR meter
Joerg - 2008-06-09 17:22:00
Spehro Pefhany wrote:
> On Mon, 09 Jun 2008 13:22:33 -0700, Joerg
> wrote:
>
> > John Larkin wrote:
> > > On Mon, 09 Jun 2008 11:31:46 -0700, Joerg
> > > wrote:
> > >
> > > > Hello Folks,
> > > >
> > > > A while ago some of us were pondering a light-weight TDR that is smal...Re: design help
Jan Panteltje - 2009-02-28 13:44:00
On a sunny day (Sat, 28 Feb 2009 09:55:21 -0800) it happened John Larkin
wrote in
:
> I recently did...
>
> http://www.highlandtechnology.com/DSS/T346DS.html
>
> which has over 250 distinct serial ascii commands, and I'm just
> finishing a serious upgrade to this,
>
> http://www....Re: 89C51ED2 update
TT_Man - 2008-09-12 07:25:00
> >
> >
> I *was* going to use the device, and saw yout posting and thought "oh
> sh*t!" better find a more reliable manufacturer.
> Too bad there are no second sources for a given MCU...
The Dallas 450 has just about all the same goodies + runs faster+2 comms
ports,reliable ISP v...USB interface
2009-03-19 22:43:00
I need to download the data from a 4 Mb ram into my pc through a USB port.
Are there any suggestions for appropriate application notes. I do know how
to build an interface for an rs232 serial port and write the software to
read it.
Bob
...Re: embedded OSs
Jan Panteltje - 2010-01-17 15:15:00
On Jan 17, 7:45=A0pm, John Larkin
wrote:
> http://www.theregister.co.uk/2010/01/17/evaluating_embedded/
>
> Cool first chart.
>
> John
.... at the bottom of that page they talk about OS-less solutions...
I did a new version of io_pic today,
http://panteltje.com/panteltje/pic/io_p...Current sensing to computer...
Geir - 2008-09-25 08:30:00
Hi,
I'm looking for mains 0.1 - 150A range current sensors with some kind of
computer interface: 1-wire, RS232/485 / Ethernet etc...
Induction (transformer) or Hall type, one or three phase.
Not high accuracy, 5% would be ok. Hopefully not too expensive ;-)
Thanks a lot for any hint,...Re: Looking for simple way to interface BCD to serial (RS232)
Jamie - 2009-12-29 21:11:00
RFI-EMI-GUY wrote:
> whit3rd wrote:
>
> > On Dec 27, 1:52 pm, RFI-EMI-GUY wrote:
> >
> > > I have a device that has a three digit LED display. The chip that drives
> > > the LED also has four Binary Weighted outputs (1,2,4,8) and three
> > > address pins for 100's, 10's and units...Re: my lab
Joerg - 2009-10-09 19:50:00
a7yvm109gf5d1@netzero.com wrote:
> Well I got a HP 5316A universal counter, with the 1GHz channel and the
> OCXO.
> Very nice, I think. Although I suppose I still have the problem of not
> knowing exactly the frequency of the OCXO is, after all there are
> coarse and fine adjustments on th...Re: Open Instrumentation Project News #7
2008-03-04 09:27:00
In sci.electronics.design Bob Monsen wrote:
> FYI:
> A basic oscilloscope can be had from fpga4fun.com for less than $100.
> http://www.fpga4fun.com/Hands-on_Flashy.html
> It supports 100MSPS, and it's rs-232 based. You need to build it yourself,
> but it looks pretty simple.
Yes RS2...PIC 18F2455 USB
Jean-Christophe - 2009-05-23 05:11:00
I built myself a tiny board with a PIC 18F2455.
I use MpLab with a PicStart+.
I can Tx/Rx thru RS232 but the USB won't work.
can't communicate w/ PC even for a HID test.
Can you point me to some C sample code that
is 18F2455 compatible, so I can use its USB ?
T I A
...Re: PIC scope, a funny idea
Jan Panteltje - 2010-04-02 13:20:00
On a sunny day (Fri, 2 Apr 2010 09:34:55 -0700 (PDT)) it happened Greegor
wrote in
:
> It looks like most of the USB oscilloscopes
> depend heavily on software running on the PC.
>
> If you make it fast, have it output to standard
> JPEG files and use the older USB 1.0 to the
> PC th...C8051F330 serial port programmer
2008-06-13 03:25:00
hey folks
how to build a simple serial port (rs232) programmer to burn the
C8051F330 by silicon lab?
I built programmer for TI microcontrollers but this is 1st time to use
C8051F uC.
Thanks.
...Re: LCD graphics controller wi th RS232 lonk to PC
Jan Panteltje - 2010-03-16 08:01:00
On a sunny day (Mon, 15 Mar 2010 16:38:36 -0700) it happened mike
wrote in :
> Depends on how many you want and how you want it packaged, but a $1
> palm pilot (25-cents if you don't need color) makes a
> dandy display for a serial-connected PIC.
Where does one get 1$ palm pilots?
;-)...GPIB Terminal Emulator Question
Jim Flanagan - 2010-08-08 21:15:00
Does anyone know of any software that would allow a PC with an Agilent
or Nat Inst
GPIB card to function as a GPIB Terminal Emulator? This would be
analogous to using
say, Hyperterminal with an RS232 port. I have a piece of HP equipment
that I want
to communicate with using a simple termi...Logic Analyzer Recommendations
tomcee - 2009-10-07 13:26:00
Hello:
Would anyone care to share their opinions on these logic analyzers?:
http://www.usbee.com/sx.html
http://www.saleae.com/logic/
They have limited capabilities, but are priced quite attractively.
My application is relatively slow speed and would like to analyz...RS485: testing loopback
Ajab - 2007-12-21 03:27:00
I am using a rs232 to wire rs485 converter. I have shorted TX+ with RX
+ and TX- with RX- for 2-wire configuuration. A 120R termination
resistor is connected between TX+ and TX-.
I am using it in half-duplex configuration.
Is it possible to test loopback. Because in half-duplex either tx or
rx ...UART Multiplexing
Greegor - 2010-04-11 05:49:00
"eeboy", Are you just a shill trying to "seed" your
web page hookup to this usenet thread?
You want to apply LOTS of engineering time
because a $2.70 part is too expensive for
your one-off project?
What you're describing is an electronic version
of an A/B switch, correct?
Why wouldn't 9...Rotten USB to RS232 adaptors.
Jan Panteltje - 2009-03-27 10:43:00
http://www.voti.nl/common/usb-serial-2b.jpg
Likely same thing wit hsame conbstruction here:
http://www.beaglesoft.com/232usb.htm
and available from any more places
So I have this cable, it drives my LED disco light show PIC, from Linux.
Bought it because the chip in it supports Linux... ...Re: IRDA
aerelD - 2008-10-09 18:37:00
On Oct 9, 1:05=A0pm, "Kasper" wrote:
> Hello,
>
> I have added IRDA on one og my designs, but afterwards i figured out the
> ircomm is gone :(
>
> Can anyone come with a good/easy solution for getting data into the PC fr=
om
> my own uC?
>
> Kasper
You could use rs232 - if y...USB to parallel
Marco Trapanese - 2009-05-14 13:10:00
Hi to all,
I'm looking for a chip to use a virtual parallel port through an USB
connection. For example FTDI makes FT232* ICs for RS232 serial ports. I
need something like that but for parallel ports.
Of course, third parts applications should run fine either with physical
or virtual par...Control aircondition from computer
Geir Holmavatn - 2009-03-09 16:16:00
Hi,
Does it exist simple interface boxes which enable a computer to control
airconditioners via IR remote control signals.
I imagine a box with ethernet or RS232/422 interface and IR LEDs
pointing at the airconditioner. Via a simple API one can set the
temperature and switch on/off the ...