[sdiy] diy frequency counter

[Dave Manley]

Ian Fritz wrote:
> At 09:17 PM 10/27/2009, Dave Manley wrote:
>> Way back in the 70's I modulated a incandescent bulb with audio and 
>> detected it with a solar cell.  It sounded as good as the crappy 
>> transistor AM radio that was feeding it.  If that works, I'm sure a 
>> LED is much better.  Off to "the google"... I'm guessing the 
>> capacitance of the LED sets the modulation rate, and capacitance 
>> can't that high.  Look at the rise/fall times here (measured in nS):
>>
>> http://www.vishay.com/docs/80097/physics.pdf
>
> That's an OK reference for semiconductor physics, but this one is much 
> better:
> http://britneyspears.ac/lasers.htm
>
> Ian
Ian revealing your musical tastes?  :-p

I haven't seen that britney site in years!

-Dave