Doepfer

Hi James,

I'd be interested to see your expansion circuit if possible, sounds like a cool addition to the 152! Would it be possible to email it to me or drop it into the file box?

Thanks,

Charlie



--- On Mon, 4/2/13, James Husted <james.husted@mac.com> wrote:

From: James Husted <james.husted@mac.com>
Subject: Re: [Doepfer_a100] Can I mod a A-152 to do this?
To: Doepfer_a100@yahoogroups.com
Date: Monday, 4 February, 2013, 18:26
















 



  


    
      
      
      Forgot - no attachments in this forum! basically The thing I attached was a transistor circuit (2N5088) and some resistors and a LED to drive the output jack. It should isolate the processor fine. I will attach it to the expansion header so no mods to the board itself. That is why I asked about what else is on that header. Might as well bring out whatever I can since I will be making a panel for it.

-James



On Feb 4, 2013, at 10:21 AM, James Husted james.husted@mac.com> wrote:



> Thank You Dieter! I  was sure that something like this was available. I will probably make something like this to attach to it:

> 

> 

> 

> Nice that it is on an expansion connector too. What else shows up on that expansion connector?

> -James

> 

> 

> On Feb 4, 2013, at 1:26 AM, yahoo@doepfer.de wrote:

> 

>> 

>>> -----Ursprungliche Nachricht-----

>>> Von: Doepfer_a100@yahoogroups.com

>>> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von James Husted

>>> Gesendet: Samstag, 2. Februar 2013 08:41

>>> An: Doepfer_a100@yahoogroups.com

>>> Betreff: [Doepfer_a100] Can I mod a A-152 to do this?

>>> 

>>> 

>>> I recently got an A-152 and am using it to select the columns of

>>> two of my PGM-4X4 programmers to make sequences that can have

>>> programmable patterns to them. What I would like is to mod the

>>> A-152 so that I can add an output that produces a trigger

>>> whenever the A-152 addresses a new step. This way something like

>>> a sine wave into the A-152 would make the PGM-4X4 work like a

>>> pendulum and would also produce triggers to fire off envelope

>>> generators whenever a new address/column/note happened. Is there

>>> some internal circuit logic that can be added to create a trigger

>>> out like this?

>> 

>> This is also available as an internal "hidden" feature since  about 2005.

>> The RC4 port pin of the microcontroller (pin 6) outputs a short pulse

>> whenever the address changes. The signal is also available at the expansion

>> connector on pin 2. Pay attention that the signal is not buffered and not

>> protected against short or electrostatic charge (it's the "pure" RC4 port

>> signal). The microprocessor will be damaged if a voltage or GND is applied

>> to this pin. You have to add a suitable buffer to protect the processor. Do

>> not simply connect it to a socket !

>> 

>> Best wishes

>> Dieter Doepfer

>> 

>> 

>> 

>> ------------------------------------

>> 

>> Yahoo! Groups Links

>> 

>> 

>> 

> 

> 

> 

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> 

> 

> 

> ------------------------------------

> 

> Yahoo! Groups Links

> 

> 

> 





    
     

    
    






  










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