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Balanced to unbalanced board


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Messing with this tonight. Its playing into balanced ortho's. the gain is stock at 2 and its just enough, not real loud but sounds just great! yes this is meant for Pre duty, this is on

So I did end up using a female header socket and air wiring the ground. The part number for the 4 pin right angle header is 68016-404hlf. The leds I used are extremely bright orange-red, glad once i c

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  

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I found out that the switchboard needs a microprocessor (arduino etc) to control it.  same signaling as the original attenuator board.  The idea is no standing power on the relays.

Could someone familiar with this setup take a look at the board just to double check it?

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soren also wanted buffers and a place for the attenuator on the board, which makes the board a fair bit bigger, and thus more expensive. if people think that is a good idea, or have other ideas i am certainly willing to modify. But i think that the smaller board is a better idea

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Would the buffers be installed vertically like on the ubal/bal board? I feel like it might be an issue with stacking one board over the other in that case. I am not likely to use it either because I'll already have the ubal/bal boards.

However I would use an interface for the digital attenuator. I am totally fine with the switch board as is but I wouldn't have an issue with extra features either.

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Drew up a little relay board for I/O since the one in the recent group buy one didn't quite fit what I wanted to do. Mainly it was that I needed to use I2C instead of SPI and I want to try stacking XLRs sideways to save space on the back panel. Any suggestions on how to improve it are appreciated. 0.3mm width traces

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Consider using jumpers (i.e. 2x3 header) instead of the DIP switch to set the I2C address?.

It should be a bit smaller and once you set the address I doubt it's going to change, so jumpers should be fine :)

//UFN

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I looked into it and the relays and headers dictate the length of the board so I can't save anything there and it would probably only shave about 1-2mm off the width of the board, which probably isn't enough to do anything. Plus the DIP switch hearkens back to my horrible memories of grade school flip-flop truth table quizzes. 

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A little breakout board for the AD5254 digital potentiometer... so I can dynamically bias the Dynalo through my phone (through a uC). 256 step resolution but lowest full wiper resistance seems to be 1k so 3.9 ohm per step. 

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