[Noisebridge-discuss] can someone look something up for me in a forrest mimms book?

[Michael Shiloh]

Perfect. Thank you.

This is exactly the one I was looking for:

http://images.netisland.net/mct/images/20100424-forrest-mims-555-timer-images/IMG_0173.JPG

Note that the potentiometers are easily replaced with photoresistors 
creating a weird sound generator with Theremin-like controls, which I've 
found to be delightful to all ages.

Thanks again Michael!



Michael C. Toren wrote:
> On Sat, Apr 24, 2010 at 04:10:59AM -0700, Michael Shiloh wrote:
>> the circuit is a simple little noisemaker consisting of two 555 timers. 
>> IIRC, one generates a lower frequency that then modulates the second 
>> tone generator.
>>
>> i think it's called something something like "sound effects generator". 
>> not to be confused with his "stepped tone generator" which uses a single 
>> 556, and then went on to become the atari punk console.
> 
> Hi Michael,
> 
> I have a copy of Mims's 555 Timer book, and I took a few snapshots for
> you of both the "Sound Effects Generator" circuit, and the "Stepped Tone
> Generator" circuit (if others are curious about it).  You can view them
> at:
> 
> http://images.netisland.net/mct/images/20100424-forrest-mims-555-timer-images/
> 
> (click the thumbnails for full-size versions)
> 
> Let me know if they aren't legible enough, or if you'd like to see any
> other pages.
> 
> HTH,
> -mct
> 
>