G+_Edvardas Rimkus Posted May 24, 2017 Share Posted May 24, 2017 Hi KITA’s, for a project I need to attach some pcb’s to an inside of a filter container, a part of pcb components need to be exposed to water outside of filter. I was thinking about 3d printing a two-piece interface disc, with hidden nuts inside. I was thinking about using Tinker cad for design. The main question is to use PLA or ABS? because it will in be submerged water up to 4 meters for long periods of time. Link to comment Share on other sites More sharing options...
G+_Matt Koglin Posted May 24, 2017 Share Posted May 24, 2017 Have you considered using a pelican case, or something that has been engineered to be waterproof, as a project box? pelican.com - 1010 Protector - Micro Case | Equipment Cases | Pelican Professional Link to comment Share on other sites More sharing options...
G+_Edvardas Rimkus Posted May 24, 2017 Author Share Posted May 24, 2017 I would still need to make a hole in the pelican case. Maybe more background about the project would help. This project will be a submerged wave logger, and the hole in top of holder will go directly to pressure sensor Link to comment Share on other sites More sharing options...
G+_Matt Koglin Posted May 24, 2017 Share Posted May 24, 2017 Interesting! Just curious, will you anchor it to the floor of the ocean/lake/river so you have a relative point to measure pressure changes and convert the pressure data into something more meaningful? Also, you mentioned long periods of time. How long are we talking, and what sort of power source/battery are you planning on using? And I presume you'll be logging the data to an SD card? If you used a pelican case, you'd still have to drill a hole, but it would probably be easier to waterproof a small hole than a 3D printed box, plus those cases are very easy to open when you need to maintain the thing. Whether you 3D print it or not though, I'd love to hear more about your project though the build! :) Link to comment Share on other sites More sharing options...
G+_Edvardas Rimkus Posted May 24, 2017 Author Share Posted May 24, 2017 Yes it will be anchored, to a side and bottom of a river. The device is based on OWHL (http://lukemiller.org/index.php/2014/08/open-wave-height-logger/) project by Luke Miller. The external body is a RO membrane filter holder :) (https://www.senukai.lt/p/korpusas-ro-sistemos-membranai-vagner-sdh/4040). the bottom holes will be used for mounting hardware, the top hole will be open to the pressure sensor. The printed part will just connect the pcb to the top screw in part. It will be powered by 3 D cells. The electronics are complete, and dry tested. electronics and battery pack fits inside the holder with a decent amount of space left. senukai.lt - Korpusas RO sistemos membranai „Vagner SDH“ - Senukai.lt Link to comment Share on other sites More sharing options...
G+_Black Merc Posted May 24, 2017 Share Posted May 24, 2017 If i had just those two options, I'd go abs. Pla is said to be biodegradable. I'd prefer pvc or polycarb. Link to comment Share on other sites More sharing options...
G+_Darrell Sullivan Posted May 25, 2017 Share Posted May 25, 2017 I would go with ABS here. You can treat it with acetone and that should help turn the external layers into a more unified shell. I would probably still coat the structure with some sort of silicone or something to help make it water resistant. Link to comment Share on other sites More sharing options...
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