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- Newsgroups: comp.robotics
- Path: sparky!uunet!enterpoop.mit.edu!news.media.mit.edu!fredm
- From: fredm@media.mit.edu (Fred G Martin)
- Subject: Mini Board general information
- Message-ID: <1993Jan21.220142.7811@news.media.mit.edu>
- Sender: news@news.media.mit.edu (USENET News System)
- Organization: MIT Media Laboratory
- Date: Thu, 21 Jan 1993 22:01:42 GMT
- Lines: 156
-
- MINI BOARD GENERAL INFORMATION
-
- This short document is an introduction to the Mini Board. This
- information is posted to the Internet newsgroup "comp.robotics"
- periodically or upon request, or may be mailed to individual who
- specifically requested information. This document may be distributed
- without restriction.
-
- The Mini Board is a miniature microprocessor-based controller board
- designed for control of small robotic devices. It may be used for any
- number of applications that require sensing with analog and digital
- electronic sensors and/or control of DC and stepper motors. It may
- programmed to operate "stand-alone" (i.e, running a program
- autonomously from its internal memory) or attached via an RS-232
- serial line to provide sensing and control capability to a desktop
- computer.
-
- The Mini Board was designed at the MIT Media Laboratory. The PC board
- design, electronic schematic, related software, and documentation are
- are copyrighted but may be distributed and used freely. This means
- that you may use the Mini Board for any application you like without
- having to pay anyone for its design, but you must leave the copyright
- information intact if you re-distribute boards and/or plans.
-
- The remainder of this note provides the following additional
- information:
-
- 1. An introduction to the Mini Board: its functionality, hardware
- design, and available software.
-
- 2. How to obtain documentation, software, and PC board artwork for
- the Mini Board.
-
- 3. How to obtain physical boards.
-
-
- For more information, please contact Fred Martin at
- fredm@media.mit.edu.
-
-
- 1. THE MINI BOARD 2.0
-
- A miniature controller board for small mobile robots
-
- The MINI BOARD 2.0 is a complete embedded computer board for robotic
- applications. It can directly power four DC motors and receive inputs
- from numerous sensors. Its miniature size (smaller than a business
- card) makes it suited well for mobile applications as well as other
- embedded control.
-
- It can be programmed in 6811 assembler code or C for stand-alone
- operation, or it can serve as a serial-line based controller operated
- by a desktop PC.
-
- * overall dimensions: 3.3" by 1.86", smaller than a business card.
- If desired, an off-board serial connector can be used, allowing an
- additional .6" of board length can be chopped off.
-
- * nearly all parts can be purchased from Digikey (including all
- connectors and switches). Extensive use of resistor packs
- minimizes component count.
-
- * uses Motorola 68hc811e2 microprocessor with 2048 bytes of
- internal, electrically erasable PROM and 256 bytes of RAM.
-
- * four motor drivers for bidirectional control of small DC motors
- (up to 600 mA current, 36 volts each motor).
-
- * eight analog inputs; eight digital inputs or outputs; several
- timer and counter I/O pins, all broken out to convenient header
- ports.
-
- * on-board 5v regulator allows board to be powered by any DC power
- source from 5.6 to 36 volts.
-
- * RS-232 compatible RJ-11 port for communication/program download
- between host PC.
-
- * two modular high speed serial jacks, allowing networks of multiple
- MB 2.0's to be constructed using common 4-wire phone cable.
- Multiple-mastering bus protocols supported.
-
- * optional battery level monitoring using voltage divider from
- supply voltage before regulation.
-
- * XIRQ line broken out to a pad: when this line is given 12.5v,
- an 'hc711e9 chip with 12K of EPROM can be programmed in place.
-
- * MS-DOS, Macintosh, and Unix software provided for downloading
- programs to board. 6811 monitor program provided for recording
- changes in sensor state, controlling motors and interacting with
- other board features over serial line.
-
- * C/assembler libraries provided for code development using
- Dunfield Development Systems' Micro-C compiler.
-
-
- 2. MINI BOARD DOCUMENTATION, SOFTWARE, AND PC BOARD ARTWORK
-
- Full documentation for the Mini Board is available via anonymous FTP
- to "cherupakha.media.mit.edu" (Internet 18.85.0.47). Go to
- "pub/miniboard" directory and begin by reading the README file located
- there. ** You will need a PostScript printer to print out the
- documentation files **; if you do not have access to a PostScript
- printer, please write to the author for information about obtaining a
- hard copy of the documentation.
-
- Software for the MS-DOS, Macintosh, and Unix platforms is also
- provided on the FTP server. The provided software includes a 6811
- assembler and a program for downloading assembled programs to the Mini
- Board. If you are interested in using the Micro-C environment, you
- must buy Micro-C from Dunfield Development Systems (which has no
- affiliation with MIT). Information on doing this accompanies the Mini
- Board documentation.
-
- PC board artwork files, produced by Douglas Electronic's "Professional
- Layout" program for the Macintosh, are on-line the FTP server. For
- more information about using this format, see the information on the
- server. If people have the need for Gerber format files, please write
- to me.
-
- People who don't have access to anonymous FTP can do FTP-by-mail,
- provided as a public service by DEC. Send a message containing the
- single word "help" to "ftpmail@decwrl.dec.com" for instructions. You
- probably will want to start your queries by retrieving the file named
- "allfiles.ftp", which is at the top-level directory of our FTP server.
- This file is a recursive directory listing of all files on the server.
-
-
- 3. OBTAINING PHYSICAL PC BOARDS.
-
- An individual unaffiliated with MIT has availed himself to job of
- coordinating fabrication and distribution of the Mini Board printed
- circuit board. If you are interested in obtaining a copy or copies of
- the board, please send e-mail to Gregory Ratcliff at
- gratclif@magnus.acs.ohio-state.edu.
-
- You can also send him an order directly. At the time of this writing,
- the cost is US$6 per board. Make checks out to Gregory Ratcliff and
- mail them to him at 1763 Hess Boulevard, Columbus, Ohio 43212; call
- him at (614) 487-0694 for more information.
-
- Please understand that Greg is selling you the blank board ONLY. You
- must order parts yourself. In the past, a number of individuals have
- coordinated group parts orders for the net community. In general
- people are very appreciative of others providing this service, so if
- you are interested in a number of kits for yourself, you may consider
- coordinating a group order to push unit parts costs down!
-
-
- -----------------------end of document--------------------------
- ---------------------Thu Jan 21 16:51:14 1993----------------------
-
- --
- Fred Martin | fredm@media.mit.edu | (617) 253-7143 | 20 Ames St. Rm. E15-301
- Epistemology and Learning Group, MIT Media Lab | Cambridge, MA 02139 USA
-