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- Path: 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
- Expires: Sat, 12 Dec 1992 05:00:00 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
-
- 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.
-