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Prototype Adventure

A project log for Openthing 2 - RepTrap

Openthing 2 RepTrap is a detection device and camera trigger for capturing images of relatively small animals, including lizards, frogs etc.

mirkoMirko 08/15/2023 at 14:390 Comments

I received all components including the 0402 parts (which I never soldered before) and on Monday I also received the PCB (made by Aisler).. so it was time to test my soldering skills and eyesight.

Spoiler: both are crap! But I made it! After a couple of houres I got the first prototype of my RepTrap in my hands. I will let the images and video talk for themself. Second spoiler: it was working on the FIRST try! (almost)

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and it is PUNCHING FAST!

Mistakes I made (of course there are some)

  1. forgot to add pull-down for the LDO enable pin
  2. connected the status LED to BATT+ instead of VBUS (which made them glimming even if the edvice was off)
  3. the optocouple was not working with the 220R I added to prevent to much current to flow. But somehow even 100R did not trigger the camera... I removed them and then it fully opened the coupler. Not sure if that is the right way.
  4. the 18650 Battery Holder was made for the extended version of an 18650 incl. protection circuit but I don't have such a battery and also realised that they are super expensive.

Everything was fixable! and now it already works super nicely! But now I have to do some more coding.. but I am very proud of that thing. I hope I can test it soon in the real world to see if it really does what it is supposed to do! Stay tuned

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