[sdiy] Circle Machine prototype

[cheater cheater]

Really cool, David. Keep 'em comin!

On Sun, Aug 29, 2010 at 23:25, David Brown <davebr at earthlink.net> wrote:
> I've more or less finished my Circle Machine project. I finished the 5U
> panel and built a desktop enclosure for it. It's fun to operate. I've put
> another video of it in operation on my Circle Machine web page:
> http://modularsynthesis.com/modules/DJB-circle/circle.htm
>
> I use a control voltage to vary the sequence length to 4, 8, or 16 steps.  I
> create the shorter sequences by skipping lamps but keeping a constant
> rotation rate. This has the effect of changing the tempo by 1/2 or 1/4.
>
> None of my "modern" sequencers can use a control voltage to vary the
> sequence length.  Doing so adds an interesting twist to the sequence. The
> first video on the Circle Machine web page shows demonstrates this using a
> sine LFO to control the sequence length.
>
> A fun project. - Dave
>
> It was a fun project. - DaveAt 08:34 PM 8/15/2010, David Brown wrote:
>>
>> I've been working on building a working model of Raymond Scott's circle
>> machine.  I thought it would be fun to build something with motors and
>> lamps.
>>
>> The only information I have is the picture on the Raymond Scott site.  I
>> used a Hammond vibrato scanner base as the base for the circle machine and
>> mounted it on a plate with 16 potentiometers around it.  I only have 8 lamps
>> installed but I have it playing an octave scale (the output is quantized).
>>  I've got a thread going on Muff's in the Music Tech DIY but thought I'd
>> post a link here as well.  I'm not sure how practical it is but it's kind of
>> fun to watch.  It's also been fun to prototype.
>>
>> I'm using incandescent lamps, rheostats (e.g. potentiometers) and a CdS
>> sensor.  All the control and processing electronics are done in a
>> microprocessor (I know it's not original but those are the electronics
>> *below* the panel).  This will be a stand-alone module as it takes over 12
>> watts of power.
>
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