Poll of the Day > Any electric/electronic engineers?

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Yellow
10/17/19 5:02:29 PM
#1:


I'm designing a circuit for a noise cancelling board, picking components, using this as a reference.

https://www.mouser.com/applications/audio_noise_cancellation/

Before I go and waste a week of waiting and $40+, is there anything glaringly wrong with my components? (I'll just assume I can figure out power supply and speaker/mic)

AMP:
NE5532DR * 3
https://www.mouser.com/ProductDetail/?qs=LzFo6vGRJ4tu9UjwVgwNUQ%3D%3D

DSP:
ADAU1701JSTZ-RL
https://www.mouser.com/ProductDetail/Analog-Devices/ADAU1701JSTZ-RL?qs=sGAEpiMZZMt5TiJYBD9SCMxUGsQAjE0N6HjE%252B8AmRuA%3D
1.2V - 3.3V
EEPROM needed

CODEC:
https://www.mouser.com/ProductDetail/Maxim-Integrated/MAX9867ETJ%2b?qs=sGAEpiMZZMtq3QB8qGen7QPNkQFJ9x4cYZRYSNF2JL0%3D
1.65 V - 3.6 V

PGA:
MCP6G01T-E/OT
https://www.mouser.com/ProductDetail/Microchip-Technology/MCP6G01T-E-OT?qs=sGAEpiMZZMutXGli8Ay4kELqthI19y6KD7OHLTvNG8c%3D
1.8V - 5.5V, 110 uA


I've never done this before. It's less tutorial and more reading spec sheets. Hell, I just googled what a resistor does, and I assume I need to limit amps to each and every one of my components using some online calculator.

I just follow my own golden rule of figuring out "shit that's way too complicated", which is 95% of all information thrown at you is useless. After I get the DSP I actually need to program it with SigmaStudio.

One more thing, I see all these libraries online for noise cancellation, but I see one little function in here called "Signal Invert". That must be new, because I think all I have to do with the DSP is invert the audio signal. Seems unusual that I only have to use this one function.

Mine
cqwSF2X

Theirs
https://ez.analog.com/dsp/sigmadsp/f/q-a/65849/how-to-use-sigmastudio-software-to-realize-an-external-potentiometer-to-control-phase-the-phase-of-the-range-is-0-to-180

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Yellow
10/18/19 1:21:11 AM
#2:


Yeah, this topic was a long shot. @Mead doesn't feel like telling me how this works. I think I have it all sorted out anyway, just a lot of research.

I recommend anyone just pick up electronic design. It's a pretty fun puzzle. I figured I was good enough on the software side of things and wanted to figure out hardware. There's almost no programming involved in hardware design.

Things like Arduino helped me start. From there you can make everything more compact and efficient with custom hardware. I bught all the Arduino components for my prototype only to realize that the latency I'd get would make noice cancellation impossible. You need somewhere in the range of 35 ms of delay minimum. There goes a $100 trip to Microcenter.

To sell a product you first need a prototype. Then I figure out pitching my prototype to investors.

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Mead
10/18/19 2:05:26 AM
#3:


I think it uses electricity
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More malicious than mischievous
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