[sdiy] More pic digital audio questions

[William Berzinskas]

i'm planning on doing some testing with the onboard pic, but will probably move to something I2c.. maybe some maxim chips..  not sure yet..  as for output, same thing probably..  how would i condition the output back to a rail-to-rail signal?

  ----- Original Message ----- 
  From: Fredrik Carlqvist 
  To: 'William Berzinskas' ; synth-diy at dropmix.xs4all.nl 
  Sent: Thursday, November 25, 2004 4:19 AM
  Subject: RE: [sdiy] More pic digital audio questions


   

  I usually take a rail-to-rail op-amp, tie the '+' to a voltage divider with Vcc/2 and otherwise in a standard inverting amplifier circuit. Often I have a trimmer to set the gain on the prototype. Get a dual op-amp, because you will probably need a buffer on the output as well. 

   

  Are you using the internal ADC of the PIC? And what kind of output arrangement will you use?

   

  Fredrik C

   

   

   


------------------------------------------------------------------------------

  From: owner-synth-diy at dropmix.xs4all.nl [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of William Berzinskas
  Sent: Thursday, November 25, 2004 07:35
  To: synth-diy at dropmix.xs4all.nl
  Subject: [sdiy] More pic digital audio questions

   

  Hey everybody.. 

   

  Happy Turkey Day, Gobble Gobble.. 

  anywayz

   

  Still toying with the idea of doing some dig audio with a pic..

   

  Seems all the ADC's i can use are unipolar.. so i'm guessing i'd need some kind of preamp-ish device to adjust gain and offset to meet those needs..  anyone got a schematic for this?  is this even right?  

   
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20041125/4ff621c6/attachment.htm>