Re: Remote triggering an Apple II

["Simon D. Williams" <bb065@chebucto.ns.ca>]

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

> 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.

In this case precision is not crucial... though it will be for some of my
future projects.

Baby steps for now... ;-)

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