Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!mcsun!ukc!acorn!asmith
From: asmith@acorn.co.uk (Andy Smith)
Newsgroups: comp.sys.handhelds
Subject: Re: Digital Multimeter Front-End for HP48sx?
Message-ID: <6910@acorn.co.uk>
Date: 9 May 91 07:37:08 GMT
References: <1991May4.133115.11892@netcom.COM>
Sender: asmith@acorn.co.uk
Distribution: comp
Organization: Acorn Computers Ltd, Cambridge, England
Lines: 22

In article <1991May4.133115.11892@netcom.COM> feustel@netcom.COM (David Feustel) writes:

>Does anyone know of a simple DMM front-end for the HP48sx that permits
>the measurement of R,L,C,V and I values for electronic components? A
>device with an IR or wire interface would be real popular with EE's.
>-- 

I don't know of a DMM front end for the 48, but I have been toying with the
idea of a logic probe with trace facilities, and after Wlodek showed me a
moving sequence of sine waves on his 48, I am also pondering the possibility
of a simple 'scope facility.

A logic probe should be easy, you only need a digital to serial converter
with protection for the serial interface, and a small piece of code that
samples and displays the readings. The external circuit could be hidden in
the probe.

A scope is a little more difficult but should be possible as is a DMM, I
will have a play with these as soon as I get a 48... Though I hope someone
else beats me to it, as these would be really useful:-)

Andy