David Mahany – Failure, Recalibration & Iteration

Early last week I ordered most of my supplies and received most of them, including all of the electronics and tubing. I also ordered adhesive for the acrylic, and it should arrive this week. The only thing I haven’t ordered yet is the acrylic, but I plan on ordering it later today and I should have it within a couple days in order to do a test cut this week.

I had planned to start 3D printing some parts on the makerspace printers this past week, but due to an error all of the training quizzes needed to use the makerspace were unavailable, so I was unable to start printing. Fortunately, however, this was just fixed yesterday, so I should be able to get the prints started soon. Hopefully the queue isn’t too large so I can still do a test assembly this week and not fall too far behind.

While I was unable to start 3D printing, I was able to do a bunch of testing with the electronics to make sure everything works how I expect, and I haven’t come across any major problems so far. The electronics setup is somewhat more complex than most of what I’ve done before, since I need 12V for the pump, 5V to power the LED strip, and the ESP32 needs to control the pump using a 3.3V signal. The board also needs to control the LED strip with a 3.3V signal which seemed to work directly in my testing, though I didn’t push it too hard so more testing might be required to see if I actually need to shift the signal up to 5V.

Overall, at this point I’m probably a few days behind my planned schedule, though even if I was able to have my first prints done super early, something with a high priority came up starting Friday night that consumed a lot of my weekend (don’t worry it was a good thing), so I doubt I would have gotten much more done over the weekend anyway.

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