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kittengineering / Omgevingsmonitor_Hardware

Initial release of "de Omgevingsmonitor" as presented on the WoTS 2024
CERN Open Hardware Licence Version 2 - Weakly Reciprocal
6 stars 5 forks source link

microphone modification instructions missing #1

Open tjallingk opened 1 month ago

tjallingk commented 1 month ago

This is a really cool PCB and i really like the nano vna results and modified the antenna according to the instructions. Now it also states on the PCB:"Read Instructions about how to modify microphone" now my microphone has a noise floor of 72db (which i find a lot) and i read that and looked everywhere but can not find the information on modifying it. I don't know where i can find the instructions nor what this modification would do but i am guessing its to do with the high signal noise. Please if someone could help me get these instructions i would love to mod it even more.

kittengineering commented 1 month ago

Hi,The wrong dB results are almost certain due to a mistake in the processing software.The noisefloor of the mic is about 34 dB.To mount the microphone in an optimal position you can break it off and solder it back in a 90 degree angle.You can glue it into a piece of tube.After my holiday I will publish more of the design considerations. And why we use two cpu's. So give us a few weeks...Regards,AndriesAndries Lohmeijer Technical Director KITT Engineering m:     +31 (0)6 53625700 p:     +31 (0) 53 4315700 a:     Josink Esweg 22        7545 PN, Enschede, The Netherlands w:     www.kitt.nl     e:  @. -------- Oorspronkelijk bericht --------Van: tjallingk @.> Datum: 27-09-2024 16:38 (GMT+01:00) Aan: kittengineering/Omgevingsmonitor_Hardware @.> Cc: Subscribed @.> Onderwerp: [kittengineering/Omgevingsmonitor_Hardware] microphone modification instructions missing (Issue #1) This is a really cool PCB and i really like the nano vna results and modified the antenna according to the instructions. Now it also states on the PCB:"Read Instructions about how to modify microphone" now my microphone has a noise floor of 72db (which i find a lot) and i read that and looked everywhere but can not find the information on modifying it. I don't know where i can find the instructions nor what this modification would do but i am guessing its to do with the high signal noise. Please if someone could help me get these instructions i would love to mod it even more.

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