HP20 and USB as showed at HHC



someone at HHC showed me hi modified HP20b with a USB chip mounted in the 20b box...

Can you give me the chip reference?

thanks, cyrille


I believe Vern Lindsay had one with him. At least it had the USB connector exposed at the bottom. Sorry don't know about the chip(set).

Vern made it sound like he lived just across the street from you ;) ;).

Edited: 9 Oct 2009, 12:25 p.m.


Afaik Vern lives in or somewhere near the potato capital, so this should be near to Cyrille's house;-)


This is interesting. I was recently thinking about how to add some kind of serial connection or IR output to the 20b :-)

- Pauli


I have no direct info, but I'd gues that person just glued
in an FTDI USB/serial chip (or maybe one from Silabs/Cygnal)...

Bill Wiese
San Jose CA


I was surprised to find that the 20B back cover is not transparent to IR.


I think Vern said it was a FT232 variant he bought pre-mounted to a board from SparkFun. The only problem was it was mounted on a 1/16" board instead of a 1/64" board, so it was too thick to close the case properly.


If we track him down, someone please let me know -- I'd really like to add that information to the HP-20b wiki. I think that would be a perfect add-on to the wiki (and the 20b!).


Possibly Related Threads...
Thread Author Replies Views Last Post
  Gathering USB dumps for Connectivity Kit <-> 39gII communication... debrouxl 2 163 12-01-2013, 12:59 PM
Last Post: Marcus von Cube, Germany
  HHC 2013 RPN Programming Challenge - Final Thought Jeff O. 7 204 10-17-2013, 11:02 AM
Last Post: Jeff O.
  HHC 2013 programming contest winners Brian Walsh 52 1,165 09-26-2013, 11:39 PM
Last Post: David Hayden
  Box left at HHC Tim Wessman 1 109 09-26-2013, 11:05 PM
Last Post: Wlodek Mier-Jedrzejowicz
  HHC 2013 speakers' files Joe Horn 2 108 09-26-2013, 02:51 AM
Last Post: Geoff Quickfall
  HHC 2013 Day 2 Highlights Eddie W. Shore 6 228 09-23-2013, 04:03 PM
Last Post: Kimberly Thompson
  HHC 2013: Day 1 Highlights Eddie W. Shore 28 627 09-23-2013, 03:22 PM
Last Post: Brad Barton
  HHC / HP Museum Programming Contest for RPN and RPL machines Gene Wright 18 437 09-22-2013, 09:39 AM
Last Post: Miguel Toro
  HHC 2013 room numbers David Hayden 2 112 09-20-2013, 05:34 PM
Last Post: sjthomas
  FYI: HHC 2013 Programming contests are coming Gene Wright 0 83 09-17-2013, 03:12 PM
Last Post: gene wright

Forum Jump: