Show HN: Oasis – An open-source, 3D-printed smart terrarium

jbuch | 141 points

Well built and a great write up!

Addressing some of the comments/concerns in your documentation:

* To protect the ultrasonic mister from bad firmware frying it, you could probably replace R6 with a sufficiently sized capacitor to make an effective DC block

* I've also had issues with a thermal sensor just reading board temp, best solution is to make the sensor a separate board. Short of that, one can mill slots around it and reduce copper pour to reduce thermal conductivety from the PCB.

craghack | 3 days ago

what's the total cost of building this? and how long would it take?

ravdar | 3 days ago

This is very cool. You've done a great job with the instructions. I understand why you didn't write much about the best plants, but for those of us who are new to terrariums could you share a link about where I could learn about terrarium-appropriate plants and where to acquire them?

Aurornis | 3 days ago

I don’t think LEDs work. Don’t you need full spectrum lighting for a terrarium?

deadbabe | 3 days ago

This is a really cool project thank you for sharing.

I'm prototyping my own similar kind of thing right now - an enclosure for growing culinary mushrooms - so seeing how you've used and attached the humidifier discs is really useful inspiration.

On humidification - have you considered decontamination for the water? I think bacteria and scum build up is an issue, and I've seen heavy duty equipment incorporate e.g. a submerged UVC light for trying to keep it clean. I wonder whether it's possible to do similar on a small scale by using a UVC LED (obviously need to be careful with safety though)

dwroberts | 3 days ago

oh wow. I really want something like this at my desk.

I may have decided on my next project!

senectus1 | 3 days ago

It would be nice to see the default dimensions of this thing on the landing page.

yreg | 3 days ago

This is awesome! So much better than that MiT openAg thing.

iancmceachern | 3 days ago

Ive always wanted to do something like this. Nice!

mandsgoo | 3 days ago

I like it, but it is not mostly 3-D printed.

bethekidyouwant | 3 days ago