From: Michael M. Butler (butler@comp*lib.org)
Date: Sun Jun 29 1997 - 11:03:29 MDT
Paired Metricom (Ricochet) modems, configured for point-to-point, might
work for you IF you stay in line-of-sight; that probably means putting the
ground-based unit on a mast.
IBM is reputed to have marketed a smaller, possibly more efficient version
of the Ricochet modem that's 100% compatible--this might be worth getting
for the airborne side of things...
As for servos, the most cost-effective approach is probably to use the
Mini-SSC sold by Scott Edwards. Quoting from the Dontronics Web site:
>>
Serial Servo Controller (SSC): (The Juggler's delight) 7 Pages
Now available with text-mode control; Type "A 3 100" in any terminal
(e.g., Procomm) software, and servo 3 of controller A moves to position
100.
Modem-like box controls eight model-airplane servos from your computer's
serial port (up to 19,200 baud). Provides 0.36-degree positioning
precision. If your needs expand, unusual "repeater" circuit and serial
addressing firmware make it possible to chain up to 32 controllers from
the same serial port. A partial kit consisting of all ICs, ceramic
resonators, and printed circuit board is $50 (US). A full kit is $69
(US). An assembled and tested unit is $119 (US).
(Nuts & Volts Feb 94; Circuit Cellar, October 94).
Mini Serial Servo Controller (Mini SSC): 5 Pages
The Mini SSC controls eight model-airplane servos from your computer or
Basic Stamp at 2400 or 9600 baud. Up to 32 Minis can operate from the
same computer. Build walking robots, animations. A full kit is $29 (US).
An assembled and tested unit is $45 (US).
(Nuts & Volts Jul 95).
Scott Edwards appears not to have a public Web site, but here's contact info:
Scott Edwards Electronics
P.O. Box 160, Sierra Vista ARIZONA 85636-0160 USA
CIS 72037,2612 INTERNET 72037.2612@compuserve.com
Phone 520-459-4802 Fax 520-459-0623
MMB
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