[sdiy] My first schematic, me too

[mark verbos]

one word for you on that. Buchla.



On Dec 31, 2006, at 12:08 PM, Michael Ruberto wrote:

>
> Hi Charles,
>
> That is an interesting sine shaper. I don't think I've ever seen  
> that one before. How well does it work?
>
> M. A. Ruberto
>
>> From: Charles Bisaillon <sdiy at oveloe.com>
>> To: <synth-diy at dropmix.xs4all.nl>
>> Subject: [sdiy] My first schematic, me too
>> Date: Sun, 31 Dec 2006 10:04:21 -0500
>>
>> As the team leader for our capstone project, my task was to build  
>> and design
>> the VCO. My design is based on the ENS-76 VCO found in  
>> electronotes and
>> other books with the expo converter using a CA3046. Anyways, I  
>> breadboarded
>> the whole thing and adjusted the outputs to obtain 10 Vpp signals  
>> at the
>> outputs, I had to make lots of small adjustments and I added the  
>> whole input
>> section where a glide circuit can be seen based on a design by Harry
>> Bissell.
>>
>> I am very content of the whole VCO circuit even though the design  
>> is very
>> similar to the original, but this was my first time ever  
>> breadborading and
>> drawing electronic circuits. I had to test the design in great  
>> depth because
>> I used components I had in hand and then had to adjust everything  
>> to the
>> desired specs.
>>
>> For the glide, I would prefer to have a 2Meg pot instead of 1Meg  
>> to get a
>> longer glide time, I have to accept a fairly short max glide time  
>> as it is.
>> I also put a 100k resistor to ground at the input to the glide  
>> circuit
>> because it would not stay at zero volts when left unplugged, it  
>> would go to
>> -3.5 V instead.
>>
>> Any critique is welcomed
>>
>> http://www.oveloe.com/490/vco_sch.jpg
>>
>> Charles
>>
>>
>>
>>
>> http://www.oveloe.com
>> Voltage-Controlled Brain Waves
>>
>
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