[TI-H] Re: [A83] new program
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[TI-H] Re: [A83] new program
> The part you are looking for is called a comparator, and you will need to
> amplify the signal (with a transistor or op-amp) first. A comparator just
> makes inputs below a certain threshold 0, and above that threshold +Vcc.
> Outputs are just 1 or 0, nothing between.
I thought a 741 is a comparator and an opamp too.
> However, it won't work. You'll get the funkiest sound imaginable out of
this
> system, because there will be no dynamic contrasts, just a mix of
> frequencies cut off below a certain threshold. It will sound like the
robot
> >from hell, all harmonics and distortion. Sound just wasn't made to be
shaped
> to a square wave. You will need an ADC, and you'll have to figure out a
way
> to interface it with the TI, either by straight wiring and software comm,
or
> some glue logic and a PIC to transmit data to the calc.
Playwav worked too, so why shouldn't this be possible?
> If you're using an op-amp, learn the negative feedback circuits used to
> calibrate their gain. They're really simple -- the simplest use only two
> resistors, nothing more.
>
> --nick
snip
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