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- Newsgroups: comp.robotics
- Path: sparky!uunet!snorkelwacker.mit.edu!news.media.mit.edu!fredm
- From: fredm@media.mit.edu (Fred G Martin)
- Subject: MiniBoard specifications
- Message-ID: <1992Aug22.050405.26050@news.media.mit.edu>
- Sender: news@news.media.mit.edu (USENET News System)
- Organization: MIT Media Laboratory
- Date: Sat, 22 Aug 1992 05:04:05 GMT
- Lines: 74
-
- Several people have asked "what is the Mini Board." Here is a brief
- synopsis of the board and its features. If you would like the full
- article describing the board, follow the FTP instruction at the end of
- this letter. Gregory Ratcliff (gratclif@magnus.acs.ohio-state.edu) is
- still accepting orders for a bulk board run (he's doing this on a
- non-profit basis).
-
- Cheers,
- Fred Martin
-
- 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
-
-
-
- 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 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.
-
- To get the complete article discussing the Mini Board, including PC
- artwork, use anonymous FTP to "cher.media.mit.edu" in directory
- pub/miniboard.
-