Article View: comp.robotics
Article #369Miniboard bidirectional serial line
From: Tim Anderson has no real life.
Date: Wed, 02 Sep 1992 05:34
Date: Wed, 02 Sep 1992 05:34
25 lines
1459 bytes
1459 bytes
from diode
rs232 0---|<|------|------------0 to top of pulldown resistor
jack | (by label RP3b in schematic)
rxd === capacitor
|
---- ground
--
This half-wave rectifier supplies the -V to to xmit ckt even when recieving
on rxd, allowing bidirectional serial communication at std RS232 levels.
Who has the right 6811 for the miniboard in stock? what price?
I'd like to join a group purchase, if that transpires.
tim
p.s. this whole data power recycling scheme reminds me of a plan to run
an inverter off some phone lines, and sell the juice back to the power co. :)
--
<>V<>V<>V<>V<>V<>V<>V<>V<>V<>V<>V<>V<>V<>V<>V<>V<>
These views were held by Tim Anderson at the time.
He probably regrets it already.
Technical Details
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<1992Sep2.053427.4661@news.media.mit.edu>Path:
arc1-ca.pugleaf.net!sparky!uunet!sun-barr!cs.utexas.edu!rutgers!micro-heart-of-gold.mit.edu!news.media.mit.edu!timReferences:
<1992Aug29.222049.4513@magnus.acs.ohio-state.edu> <1992Sep2.001302.3074@PacBell.COM> <1992Sep2.045803.4051@news.media.mit.edu>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!sparky!uunet!sun-barr!cs.utexas.edu!rutgers!micro-heart-of-gold.mit.edu!news.media.mit.edu!tim From: tim@media.mit.edu (Tim Anderson has no real life.) Newsgroups: comp.robotics Subject: Miniboard bidirectional serial line Summary: signal lines as ac power Keywords: serial line, stuff Message-ID: <1992Sep2.053427.4661@news.media.mit.edu> Date: 2 Sep 92 05:34:27 GMT References: <1992Aug29.222049.4513@magnus.acs.ohio-state.edu> <1992Sep2.001302.3074@PacBell.COM> <1992Sep2.045803.4051@news.media.mit.edu> Sender: self Followup-To: blah Organization: MIT Media Laboratory Lines: 25