Great news! Now you can have back issues of SERVO
AND Nuts & Volts on CD! You can get the first 14 issues
of SERVO from years 2003 and 2004, and all 12 issues of
Nuts & Volts from 2004 (2005 coming Jan 06). Stored as
PDFs, you can print and search an entire volume at a time.
You can purchase said CD(s) from us, for your own
personal use, and donate your old paper copies to your
local school or library.
Continued from page 6
I have been reading Jon William's article on the
Playstation Robot controller. I wanted to contribute
my idea for intercepting PS2 commands. I have suc-cesfully used this method to intercept the command
to put the controller into analog mode.
The PS2 controller interface is a standard SPI
interface. I congfigured an Atmel AVR microcontroller
as a SPI slave leaving the I/O ports tri-stated. A short
routine reads the SPI data into the SPI data register
and transfers the data to the UART to hyperterminal on my PC. Switching the AVR MISO input
between the command and data lines allows the
game console data and the controller’s response
to be viewed. When the action you are trying to
replicate occurs, the change in the Command/Data
sentence is the command responsible for this action.
THIS MAY HERTZ ...
Regarding the answer to the Q&A question
"Ghost of a MM5369 Clock” in the January 06 issue ...
In addition to the ELM440 IC replacement for
the MM5369 60 Hz generator (NV Jan 06, pg. 14, Craig
Kendrick Sellen), Microchip Technology, Inc., has an
article published — DS40160A/4_008 — with the
title An Enhanced MM5369 -60MHz Generator. The
60 MHz is obviously wrong and should be 60 Hz, but
the article gives all the details to program a
PIC12C508 for a 60 Hz and a 1 Hz output.
Duco W. Weytze
I am a retired engineer and have been reading
or subscribing to your magazine for as long you have
been publishing and I have to agree with Ruben Lara
in your December issue Reader Feedback. It appears
to me that the computer geeks and robotics geeks
have taken over your magazine to the exclusion
of us experimenters and project construction
enthusiasts who like to build simple analog and
I do not know how to program Stamps and have
no desire in the future really to learn. I also can see
no practical value on how to build a electronically run
Dremel tool as a milling machine.
One of the things that originally caused me
to read your magazine was the circuit design information and drawings for various simple apparatus
and fun gadgets to build. I especially like TJ Byers’
Q & A and that is primarily why I keep taking your
magazine. Don’t let the special interests ruin what
was a terrific magazine.
Harry J. Kennedy