MLA Posted January 20, 2017 Report Share Posted January 20, 2017 Am looking at it but I don't see the input resistors (file diffinput3 right?). Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 20, 2017 Report Share Posted January 20, 2017 (edited) it had better look like this the output impedance is about 1k, working on the diamond buffer output now Edited January 20, 2017 by kevin gilmore 3 Quote Link to comment Share on other sites More sharing options...
MLA Posted January 20, 2017 Report Share Posted January 20, 2017 Now it does. Thanks! Must have been the cache of my browser acting up. Quote Link to comment Share on other sites More sharing options...
mtoc Posted January 22, 2017 Report Share Posted January 22, 2017 Pardon me, how to wire the boards? why O+ one one side, i+ on the other? GND GND -i O- Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 22, 2017 Report Share Posted January 22, 2017 (edited) start laying out your own boards and you will know why. there will be a all smd version at some point with these as output buffers .8 x 1.5 inch Edited January 22, 2017 by kevin gilmore 5 Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 22, 2017 Report Share Posted January 22, 2017 for soren, thru hole version with servo Quote Link to comment Share on other sites More sharing options...
Pars Posted January 23, 2017 Report Share Posted January 23, 2017 start laying out your own boards and you will know why.+1Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
sbelyo Posted January 23, 2017 Author Report Share Posted January 23, 2017 Now we're talking... So if I understand that would go after the output from the unbalanced\balanced to balanced board. Is that correct? Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 23, 2017 Report Share Posted January 23, 2017 yep, gets the output impedance down to say 5 ohms. then you can add some resistance to match the cables you intend on using, +45 or +70 ohms Quote Link to comment Share on other sites More sharing options...
cspirou Posted January 23, 2017 Report Share Posted January 23, 2017 It looks like the buffer is single ended. So would you need 4 diamond buffers for 2 balanced channels? Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 23, 2017 Report Share Posted January 23, 2017 correct Quote Link to comment Share on other sites More sharing options...
MLA Posted January 23, 2017 Report Share Posted January 23, 2017 (edited) On 2017-01-22 at 1:38 PM, kevin gilmore said: there will be a all smd version at some point with these as output buffers .8 x 1.5 inch Really looking forward to that! Edited January 23, 2017 by MLA Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 23, 2017 Report Share Posted January 23, 2017 (edited) some people are going to have trouble assembling this, same size for comparison see updated picture below Edited January 23, 2017 by kevin gilmore 1 Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 23, 2017 Report Share Posted January 23, 2017 2 Quote Link to comment Share on other sites More sharing options...
MLA Posted January 24, 2017 Report Share Posted January 24, 2017 (edited) 6 hours ago, kevin gilmore said: some people are going to have trouble assembling this Possibly, but it's still fantastic!!! Edited January 24, 2017 by MLA Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 24, 2017 Report Share Posted January 24, 2017 (edited) moar better 2.65 x 2.27 inch Edited January 24, 2017 by kevin gilmore 3 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted January 24, 2017 Report Share Posted January 24, 2017 Now you just need a second on the other side of the board Quote Link to comment Share on other sites More sharing options...
MLA Posted January 24, 2017 Report Share Posted January 24, 2017 (edited) 24 minutes ago, luvdunhill said: Now you just need a second on the other side of the board Or a diamond buffer or two ... (or are they better off separated?) Edited January 24, 2017 by MLA Quote Link to comment Share on other sites More sharing options...
Pars Posted January 24, 2017 Report Share Posted January 24, 2017 I would think that incorporating the diamond buffers for balanced would be the way to go. Do you have a schematic for this board as well?Broken record time... Any chance of including footprints for 0.1" Molex KK connectors as well?Good time to duck now Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
sbelyo Posted January 24, 2017 Author Report Share Posted January 24, 2017 (edited) Am I going to need an oven for my birthday? Or, will there be a through hole version with the diamond buffer included? Ducking as well If not I'll be fine with four or the through hole buffer boards and the unbal board Edited January 24, 2017 by sbelyo Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 24, 2017 Report Share Posted January 24, 2017 diamond buffers will stand vertical on that board. there are thru hole versions of both pieces already 2 Quote Link to comment Share on other sites More sharing options...
mtoc Posted January 24, 2017 Report Share Posted January 24, 2017 any possibility to make these two new input output boards smaller than ever before while making them still be better than all the versions which released last year? (small size saves money) Quote Link to comment Share on other sites More sharing options...
MLA Posted January 24, 2017 Report Share Posted January 24, 2017 For all intents and purposes, that's exactly what just happened. 2 Quote Link to comment Share on other sites More sharing options...
sorenb Posted January 24, 2017 Report Share Posted January 24, 2017 how does this compare to the 49830? (I know it's obsolete, but still) Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted January 25, 2017 Report Share Posted January 25, 2017 lm49830 is a chip amp do you mean opa1632 and its clones, all of which require huge amounts of feedback and have all sorts of common mode dc issues 1 Quote Link to comment Share on other sites More sharing options...
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