Re: Remote triggering an Apple II

["Michael J. Mahon" <mjmahon@aol.com>]

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.

-michael

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

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