[sdiy] controlling VCO with guitar

[dan snazelle]

its a cincon EC3AE05M

the EC series
 data sheet is a joke

it tells nothing...if i could replace this part I surely would





On Jan 21, 2011, at 9:13 AM, Justin Owen wrote:

>> i use a 12-15 dollar DC to DC converter in the mini-ark and the tracer city
> 
> Dan,
> 
> Any chance you could post a link to the component you're using for DC to DC?
> 
> Thanks,
> 
> Justin
> 
> 
> On Jan 20, 2011, at 11:55 AM, Harry Bissell wrote:
> 
>> lol (DESIGNING WITH CHARGE PUMPS TODAY)
>> 
>> Most charge pumps have about a 6V max input, so doubling a 9V might be tricky. If you did double, and invert negative you
>> could get roughly +/- 18V (unregulated) at light currents. Possibly you could use an LDO regulator to get +/-15. As you are switching
>> anyway you might be better off with an inductor based solution.
>> 
>> Capacitors will have high inrush currents (think spikes) and inductors will have lots of noise when they switch off (think spikes).
>> Hey, its a switching regulator either way...
>> 
>> H^) harry
>> 
>> 
>> 
>> ----- Original Message -----
>> From: ASSI <Stromeko at nexgo.de>
>> To: synth-diy at dropmix.xs4all.nl
>> Sent: Thu, 20 Jan 2011 11:35:28 -0500 (EST)
>> Subject: Re: [sdiy] controlling VCO with guitar
>> 
>> On Thursday 20 January 2011, Paul Perry wrote:
>>> It's not trivial to get +-15v with charge pumps - check the input voltage
>>> ratings on the cheap pumps.
>> 
>> Not sure what you mean by charge pumps (the only ones I know that are true
>> charge pumps are for TTL->RS232, e.g. from Maxim), but you'd have a hard
>> time drawing much curent from one of those.  There are however inductor
>> based DC/DC converters that have +-12V and +-15V output.  Traco has some
>> isolated ones with 4:1 range input starting from 4.5V that are rated 3W, for
>> instance.  Ripple voltage is something to look out for, so you might need to
>> follow with a pair of linear regulators to clean up.
>> 
>> 
>> Achim.
>> --
>> +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
>> 
>> Samples for the Waldorf Blofeld:
>> http://Synth.Stromeko.net/Downloads.html#BlofeldSamplesExtra
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>> --
>> Harry Bissell & Nora Abdullah 4eva
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