[sdiy] Eu might be banning Vactrols and LDRs??

[Scott Nordlund]

----------------------------------------
> Date: Thu, 10 Sep 2009 20:20:32 -0600
> To: gsn10 at hotmail.com; synth-diy at dropmix.xs4all.nl
> From: ijfritz at comcast.net
> Subject: RE: [sdiy] Eu might be banning Vactrols and LDRs??
>
> At 08:04 PM 9/10/2009, Scott Nordlund wrote:
>
>>Solar cells are actually the same as photodiodes, only with a much
>>larger junction. Where photodiodes are usually optimized for speed,
>>a solar cell will have a large junction capacitance and thus a slow
>>response time.
>>
>>If you reverse bias it, I'd guess you could get some sort of resistor
>>effect out of it. Just remember that photocurrent goes the "wrong
>>way".
>
> Possibly, but at that point wouldn't a phototransistor (or a photoFET) be
> preferable?
>
> Ian
>

Well, sure, but it's interesting enough for the purpose of idle

discussion.



I did actually use a solar cell and computer speakers to generate

crappy "chiptune" audio with a Xilinx Virtex II FPGA board in 
college.
I wrote a little "synth" program that just used nested for() loops.
 It was a terrible last-minute cobbled together idea, but 
it was also
a terrible last-minute cobbled together course.

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