Hi all,
THE STORY:
I recently got my hands on a decommisioned "drain crawler" which is a type
of human controlled, robotic "sled" originally designed to travel up and
down the stormwater/sewerage drainage system in search of cracks and
what-not. Thinking this would be a cool thing to mess around with, I picked
it up even though it lacks its controller unit. This isn't to much of a
problem as it receives it's control instructions through a set of audio
tones sent over a cable link, with each tone manipulating a certain
function. In a week or so I'll be getting the chart that says what tones
operate what so that's no problem.
THE POINT:
Where this becomes relevant to the list is that I'm planning on digging out
my old PowerBook 100 and using it to generate the necessary tones and
control the robot. I plan on hooking a cable to the audio-out jack and
wiring this to the robot. The only problem is that the robot's control
circuits have pretty tight tolerances on what tone quality is acceptable, so
my question is: Just how clean a tone can the PB 100 or average Vintage
Mac's sound system produce? For example, if I programmed the '100 to produce
a 1500Hz tone, how likely is the result to be 1500Hz as opposed to something
200Hz or so "around" it?
Sorry for this rambling post, especially as it likely makes no sense but
these 5am starts at work are getting to me.
Cheers,
Adam.
--
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