[sdiy] AD/DA schematics? quantizers,etc

Wed May 13 19:15:58 CEST 2009

thank you so much!!! this is the kind of info i have been looking for.

i am going to print this out

so i suppose one bad thing about the ADC0808 is that it needs a clock 

the adc0804 does not?

can i use a 40106 clock driven from +5 and grnd?

----------thank----------------------------------
check out various dan music at:

 http://www.myspace.com/lossnyc  

(updated monthly)

http://www.soundclick.com/lossnyc.htm

http://www.indie911.com/dan-snazelle

(or for techno) http://www.myspace.com/snazelle

ALSO check out Dan synth/Fx projects:

AUDIO ARK:

www.youtube.com/watch?v=TJRpvaOcUic

www.youtube.com/watch?v=BqIa_lXQNTA&feature=channel_page

www.youtube.com/watch?v=V4nJPjGgOcU&feature=channel_page

and soundtrack/design work:

NEW: check out Dan's sound design from the 1998 award winning film SAFARI by catherine chalmers

http://www.catherinechalmers.com/videos.cfm 

> From: jerryge at cableone.net
> To: synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] AD/DA schematics? quantizers,etc
> Date: Wed, 13 May 2009 11:40:15 -0500
> 
> Ok that look like a basic functional setup, but you still need the Clock
> signal at about 500 khz or less. This should be a Square wave at TTL levels
> i.e. 0 - 5vdc.
> 
> A couple of other things: the Ref+ and Ref- is across the 5 volt supply, to
> hit Notes this may need to change. Second the Address Lines (ABC) are set
> low (GND) this selects analog input 0 only, if you wish to use the other
> inputs you can use switches and some resistors to set them to Logic High or
> Low individually TABLE 1. Analog Channel Selection in the Data Sheet shows
> how this works.
> 
> If you setup the DAC0808 as in FIGURE 1. +10V Output Digital to Analog
> Converter of its data sheet and connect the A1 - A8 lines to the (Simple
> Analog to Digital Converter) D0 - D7 lines ( replacing the LEDS ) you have a
> basic quantizer. The nomenclature is mixed in these two schematics the
> hookup is A1-D0, A2-D1 A3-D2, A4-D3 etc.  Again, If you want "Notes" you
> will need to modify the Vref+ voltage.
> 
> Also Important Note the Analog inputs of the A to D cannot be above 5 volts
> or below 0. To feed normal 0 to 10vdc you will need to use at least a
> voltage divider ( two resistors) an Opamp setup would be a better choice..
> 
> You can do bit decimation by disconnecting the lower bits (A1-D0, A2-D1
> etc.) Using switches. if you do this use Pull Down (aprox 10K) resistors on
> the D to A inputs you disconnect. This may be interesting with an audio
> signal.
> 
> -----Original Message-----
> From: Dan Snazelle [mailto:subjectivity at hotmail.com]
> Sent: Wednesday, May 13, 2009 10:58 AM
> To: jerryge at cableone.net; synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] AD/DA schematics? quantizers,etc
> 
> 
> 
> 
> hooray!!!
> 
> found the answer
> 
> http://eftekasat101.blogspot.com/2008_09_01_archive.html
> 
> 
> --------------------------------------------
> check out various dan music at:
> 
> http://www.myspace.com/lossnyc
> 
> (updated monthly)
> 
> http://www.soundclick.com/lossnyc.htm
> 
> 
> 
> http://www.indie911.com/dan-snazelle
> 
> (or for techno) http://www.myspace.com/snazelle
> 
> ALSO check out Dan synth/Fx projects:
> 
> AUDIO ARK:
> 
> www.youtube.com/watch?v=TJRpvaOcUic
> 
> www.youtube.com/watch?v=BqIa_lXQNTA&feature=channel_page
> 
> www.youtube.com/watch?v=V4nJPjGgOcU&feature=channel_page
> 
> and soundtrack/design work:
> 
> NEW: check out Dan's sound design from the 1998 award winning film SAFARI by
> catherine chalmers
> 
> http://www.catherinechalmers.com/videos.cfm
> 
> 
> 
> 
> 
> 
> ----------------------------------------
>> From: jerryge at cableone.net
>> To: subjectivity at hotmail.com
>> Subject: RE: [sdiy] AD/DA schematics? quantizers,etc
>> Date: Wed, 13 May 2009 10:28:36 -0500
>>
>>
>>
>> It looks like the Fuzzy ADC0808 is miss labeled, that is likely a
>> ADC0801-ADC0805. The ADC0801 - ADC0805 series are setup to Free Run, it
> look
>> like you need some extra logic or a uProcessor interface to make the
> ADC0808
>> run.
>>
>>
>>
>> -----Original Message-----
>> From: synth-diy-bounces at dropmix.xs4all.nl
>> [mailto:synth-diy-bounces at dropmix.xs4all.nl]On Behalf Of Dan Snazelle
>> Sent: Wednesday, May 13, 2009 9:46 AM
>> To: synth-diy at dropmix.xs4all.nl
>> Subject: RE: [sdiy] AD/DA schematics? quantizers,etc
>>
>>
>>
>>
>>
>> check this out:
>>
>>
> http://experimentalistsanonymous.com/diy/Schematics/Fuzz%20and%20Fuzzy%20Noi
>> semakers/Digital%20fuzz.bmp
>>
>> i was going to try and build it as it uses an ADC0808 but he only labels
>> pins up to 20!....so now i dont know if he just didnt touch pins 21-28 or
> if
>> i have a totally different chip
>>
>> this is all very confusing!
>>
>>
>>
>> i found another schematic that uses an ADC0804 for the input and it seems
>> VERY different than an adc0808 in that it only has a + and a - input
> instead
>> of 8 multiplexed inputs.
>>
>>
>> in general are the ADC08xxx chips pretty easy to switch for another one in
>> the series? or do i need to just go out and order the ADC0804 if thats
> what
>> it calls for?
>>
>> can anyone recommend a good book on AD/DA converters?
>>
>> thanks
>>
>>
>>
>>
>> --------------------------------------------
>> check out various dan music at:
>>
>> http://www.myspace.com/lossnyc
>>
>> (updated monthly)
>>
>> http://www.soundclick.com/lossnyc.htm
>>
>>
>>
>> http://www.indie911.com/dan-snazelle
>>
>> (or for techno) http://www.myspace.com/snazelle
>>
>> ALSO check out Dan synth/Fx projects:
>>
>> AUDIO ARK:
>>
>> www.youtube.com/watch?v=TJRpvaOcUic
>>
>> www.youtube.com/watch?v=BqIa_lXQNTA&feature=channel_page
>>
>> www.youtube.com/watch?v=V4nJPjGgOcU&feature=channel_page
>>
>> and soundtrack/design work:
>>
>> NEW: check out Dan's sound design from the 1998 award winning film SAFARI
> by
>> catherine chalmers
>>
>> http://www.catherinechalmers.com/videos.cfm
>>
>>
>>
>>
>>
>>
>> ----------------------------------------
>>> From: subjectivity at hotmail.com
>>> To: tom at electricdruid.net
>>> Subject: RE: [sdiy] AD/DA schematics? quantizers,etc
>>> Date: Wed, 13 May 2009 13:23:39 +0000
>>> CC: synth-diy at dropmix.xs4all.nl
>>>
>>>
>>>
>>>
>>> yes i have actually built quite a few crushers , some of my own design.
>> they are cool but i am looking for something a bit different
>>>
>>> i suppose what i meant was i was interested in changing BOTH the sample
>> rate AND bit rate of the incoming audio with an AD/DA setup
>>>
>>> thanks!
>>>
>>>
>>>
>>>> Dan,
>>>>
>>>> One quick comment;
>>>>
>>>>> i am really trying at first to make:
>>>>>
>>>>> a sample rate reducer or crusher
>>>>
>>>> These are quite different, reducing the amount of digital data in
>>>> either the X or the Y direction.
>>>> For a sample-rate reduction type effect, you should have a look at
>>>> Tom Bugs' bugcrusher, although it isn't actually reducing any sample
>>>> rates. Rather it's an audio-rate S&H. Still, similar sound.
>>>>
>>>> A real bitcrusher effect would be generated by sampling the input
>>>> with an A/D, then feeding only the most significant bits (you choose
>>>> how many) to the output D/A.
>>>>
>>>> I've got this effect in software on my digital oscillator. It allows
>>>> you to reduce the output resolution from 16-bit down to 1-bit. This
>>>> is further than anyone really needs to go, but it made the control
>>>> easier to do!
>>>>
>>>> HTH,
>>>> Tom
>>>>
>>>>
>>>>
>>>
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>>
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