Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!mcsun!hp4nl!kunivv1!ge
From: ge@kunivv1.sci.kun.nl (Ge' Weijers)
Newsgroups: comp.sys.handhelds
Subject: Re: Easy HP infra-red PC receiver.
Message-ID: <692@kunivv1.sci.kun.nl>
Date: 15 Jan 90 10:29:24 GMT
References: <5916@sdcc6.ucsd.edu> <10169@microsoft.UUCP> <843@wombat.UUCP>
Organization: University of Nijmegen, The Netherlands.
Lines: 22

george@wombat.UUCP (George Scolaro) writes:
>Is the HP28(s) similar to the HP42S? I think it must be since the same
>printer can be used with both? Anyhow, a friend and I have just put
>together a trivial little circuit based on the Motorola MC3373, and
>8 pin minidip IR receiver. We wrote a small (hundred or so line 
>assembler program) and have it decoding the IR coming from the HP42S.

>The circuit came pretty well straight out of the motorola master
>selection guide in the remote control circuits section. Its basically
>a few dollars worth of bits.

A bit more information on this would be welcome. The circuit sounds simple.
The problem with the Radio Shack thing seems to be the automatic gain control.
Not a problem with a TV remote control, but a pain with a calculator.
What IR receiver did you use? (If it's a minidip receiver, what's the MC3373
for? I haven't used one of those)

Ge' Weijers
Ge' Weijers                                    Internet/UUCP: ge@cs.kun.nl
Faculty of Mathematics and Computer Science,   (uunet.uu.net!cs.kun.nl!ge)
University of Nijmegen, Toernooiveld 1         
6525 ED Nijmegen, the Netherlands              tel. +3180612483 (UTC-2)