A twisted tale about a logarithmic relay attenuator - Page 51 - diyAudio
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Old 12th June 2008, 03:25 PM   #501
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Great news! Is said controller of the uber variety? ;D
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Old 12th June 2008, 03:29 PM   #502
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Quote:
Originally posted by fierce_freak
Great news! Is said controller of the uber variety? ;D

Yes. But we dropped the "Uber" name in favor of "AC1" which stands for audio controller number 1.

The reason is we want to reserve the term uber for later possibly.

It will be used along with another module we have called "Femto".

Which is basically a micro controller on a little board with a USB port. The Femto can be reprogrammed by users with just about any PC.

This allows us to easily push out firmware. And it allows us to use the same basic controller for many applications. AC1 is basically an application mother board which the Femto module plugs into.

Cheers!
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Old 12th June 2008, 03:39 PM   #503
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Great idea with the Femto. I'll be looking forward to details on the AC1 and Femto (even footprint).
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Old 12th June 2008, 03:41 PM   #504
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Quote:
(even footprint)
Currently, same as Opus footprint (3.3" x 2")
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Old 12th June 2008, 03:45 PM   #505
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Here is what it looks like.
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Old 12th June 2008, 03:48 PM   #506
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And here is the Femto.
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Old 12th June 2008, 04:20 PM   #507
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And here is the driver. Also Opus sized.

The Driver board can be given a 3 bit address.

This allows for independent control.

Also note this driver will work for the Darwin.

Also note it has it own PS to help spread the load for driving lots of relays.

Cheers!
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Old 12th June 2008, 04:32 PM   #508
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I'm still having some slight trouble with my Joshua Tree. At the lowest attenuation setting, I'm still hearing music passing through. And judging by the addition of the mute relay in MKII, does that mean the old Joshua Tree boards only attenuate but don't fully mute?

Is there a way to wire in full mute?
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Old 12th June 2008, 04:47 PM   #509
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Quote:
Originally posted by Mazuki
I'm still having some slight trouble with my Joshua Tree. At the lowest attenuation setting, I'm still hearing music passing through. And judging by the addition of the mute relay in MKII, does that mean the old Joshua Tree boards only attenuate but don't fully mute?

Is there a way to wire in full mute?

The older JT attenuates from 0 to -63.5db in .5dB steps, so, no full mute. Without adding another relay or switch somewhere, you can't do full mute with it.
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Old 12th June 2008, 06:39 PM   #510
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Quote:
Originally posted by BrianDonegan


Currently, same as Opus footprint (3.3" x 2")

the JT boards don't *look* to be opus footprint, but looks are deceiving I suppose in this case.
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