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'hp 82240b ir printer'
1997\01\08@083917 by Victor Fraenckel

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hp makes a great thermal printer the hp82240b 'redeye' printer for use
with the hp48 series calculator. the calculator communicates with the
printer via infrared. it occured to me that the redeye would make a great
printer/logger for small projects if a way could be found to convert
serial (rs232) data from a microcontroller for example, into the ir
protocol. if a blackbox could be made to do the rs232 ==> hpir protocol
then the printer would be very useful whereever serial data is available
and begging for printing. the printer is available in the $100 price class
and is battery powered and comes with a wallwart type ac/dc power supply.

has anyone done a protocol converter to do the above. if so, i would like
to hear from you.

regards
vic fraenckel

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1997\01\08@105835 by David Schmidt

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There was an article on using this printer in just the way you want in
Circuit Cellar about a year ago.  I don't have the issue on hand but they
may have an index on their web site for it.
Dave

At 08:38 AM 1/8/97 -0500, you wrote:
>hp makes a great thermal printer the hp82240b 'redeye' printer for use
>with the hp48 series calculator. the calculator communicates with the
>printer via infrared. it occured to me that the redeye would make a great
>printer/logger for small projects if a way could be found to convert
>serial (rs232) data from a microcontroller for example, into the ir
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1997\01\08@112213 by Brian Read

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The HP IR printer uses standard ASCII 8,n,1 serial comms with
the exception that the LED in the HP calculator has a 16ms
pulse instead of the standard async timming (saves that battery juice)

Brian

1997\01\08@141651 by Kalle Pihlajasaari

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Hi,

> From:         Brian Read <breadspamKILLspamMAXWELL.EE.WASHINGTON.EDU>
> The HP IR printer uses standard ASCII 8,n,1 serial comms with
> the exception that the LED in the HP calculator has a 16ms
> pulse instead of the standard async timming (saves that battery juice)

Not so.


> From:         David Schmidt <.....dschmidtKILLspamspam.....RAIN.ORG>
> There was an article on using this printer in just the way you want in
> Circuit Cellar about a year ago.  I don't have the issue on hand but they
> may have an index on their web site for it.

Issue #55 February 1995.
The code in the article is not on line though I just checked.


> From:         Joe Dowlen <EraseMEJoe_Dowlenspam_OUTspamTakeThisOuTEGGINC.COM>
> Subject:      Re: hp 82240b ir printer and 82143a
>      I have several HP82143A thermal printers that interfaced to HP41CV
>      calculators. These plugged into the calculator directly. If anyone
>      knows the pin connections and data protocol for my printer or for the
>      82240b I would also be interested.

About these printer I have no clue.


{Quote hidden}

You may have a look at my write up on driving one of these printers
via a PC parallel port.  The program basic are similar to those in the
Circuit Cellar Inc. article but twisted and expanded on.  This is
in poorly commented but very readable PASCAL and there is also a link
to a file I found that has the protocol pretty well defined that looks like
the basis of the CCI article.  You can have a look at the writeup with
the code and spec pointers at the following URL :

  http://www.ip.co.za/people/kalle/project.htm#hpir

Cheers
--
Kalle Pihlajasaari   kallespamspam_OUTip.co.za   http://www.ip.co.za/ip
Interface Products   P O Box 15775, DOORNFONTEIN, 2028, South Africa
+ 27 (11) 402-7750   Fax: 402-7751    http://www.ip.co.za/people/kalle

DonTronics, Silicon Studio and Wirz Electronics uP Product Dealer

1997\01\08@221550 by Martin McCormick

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       This information may be old, but if you call the HP calculator
support group in Corvalis, Oregon and tell them what you are doing, they
have a brief application note describing the protocol and how it works
for just such applications.

       I did the reverse of this about 6 years ago and built a receiver
using the Motorola 68HC11 as the decoder and a Sharp IR detector module.
It worked and the application note was quite helpful even if it described
what kind of signal to feed to the printer rather than how to receive
from the calculator.  The calculators have some gitter in their output so
the printer is probably somewhat forgiving of slight timing problems.  I
don't have the phone number or any other specifics at hand, but a call to
HP should get you started.

Martin McCormick WB5AGZ  Stillwater, OK 36.7N97.4W
OSU Center for Computing and Information Services Data Communications Group

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