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kevin gilmore

digital attenuator

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I wouldn't mind doing a run for all the boards needed for a complete system with volume control and source selection.  I know Kerry was working on or has code for the volume control

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On 3/20/2017 at 7:23 AM, Kerry said:

I've got my controller boards working pretty well now with the digital attenuators.  I like the larger one because it has a really nice feel as you turn the volume knob (...yes I see it :P).

I went and added a USB input to the board itself, though this is really overkill - which is why I did it.

IMG_0315.thumb.JPG.0d463cef57a0e76e4e32c49ab3835d8b.JPG

 

Here I'm updated with the TX / RX LEDs blinking away.

IMG_0313.thumb.JPG.f843a2dd0446734d726b1df0d22eb590.JPGIMG_0314.thumb.JPG.49108924af68518ce41335f0f66addb4.JPG

 

EDIT: I've got to do one more round of cleaning...

Hey Kerry - Just wondering, what motorised encoder/pot are you using? I tried googling the # on the sticker, but didn't turn up anything >< Putting my BOM for the boards together now :)

Thanks mate.

 

edit: I’m going with this one in case anyone else is interested, https://au.mouser.com/ProductDetail/688-RK16812MG099

Edited by Aive
Update

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The pot model is called an Alps RK16812.

Edited by UFN

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You guys see any issue powering the attenuator with switchers? Was thinking the meanwell stuff used in the smd ss dynalo, irm series

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That should be ok. Just keep that power including the ground isolated. 

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