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Re: Remote triggering an Apple II

Simon D. Williams wrote:

On Fri, 10 Feb 2006, Michael J. Mahon wrote:



Simon D. Williams wrote:


I have a project in mind that requires having one or more A2s triggered
via a footswitch and I'm wondering ig the following setup will do the job:

------                                     -=-
Apple | PB0 <--------/switch/-------- POS |   |
Game  |                                   |   | 4.5 V Battery
Port  | GND ------------------------> NEG |   |
------ --- 

You can do it without the battery, since +5 is available on the
game connector:

+5v >----------+
               |
               o |
                 |-  Switch
               o |
               |
PB0 >----------+
               |
               /
               \  220 ohms
               /
               \
               |
Gnd >----------+

If you're triggering more than one Apple, you only need to connect
to the +5 of one of them, and will only need one 220 ohm resistor.
In other words, just run the "PB0" and "Gnd" lines to the other
computers.



Perfect! I'll give this a try over the weekend...


You didn't say what precision is required, but if a millisecond
or more uncertainty is OK, no other precautions are required.

-michael

Music synthesis for 8-bit Apple II's!
Home page:  http://members.aol.com/MJMahon/

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