iSpindel drawer for wireless charger in a 33x123mm XL petling tube

thingiverse

This drawer version for the iSpindel Project is designed specifically to fit petling tubes measuring 33x123mm. I purchased them from: https://www.ebay.com/itm/5-XL-BIG-PET-Micro-Geocaching-container-geocache-Petling-preform-soda-bottle/132379354446?hash=item1ed26ca54e:g:0LkAAOSwe-FU4GqL:rk:1:pf:0 Kudos to Frankdaastoel and his detailed description in Norwegian at https://daastoel.com/2017/02/25/ispindle/. This petling tube fits perfectly into the holder that he designed here: https://www.thingiverse.com/thing:2169567. He also has a Wireless edition that accommodates this tube, but I created a new drawer to build the electronics exactly as described on GitHub without any modifications except for the Wireless charging: https://github.com/universam1/iSpindel/blob/master/docs/README_en.md. For build instructions, visit: https://github.com/universam1/iSpindel/blob/master/docs/iSpindelbreadboard_en.md. Note that the battery bay is a few mm longer than the NCR18650b battery I used, allowing for fine-tuning of the weight distribution by moving the battery. I achieved very close to 25 degrees tilt without additional weights. I aimed for 25 degrees tilt in water as a good starting point for calibration. I secured the battery with hot-glue when I was satisfied with the tilt. Kudos to everyone who contributed to this fantastic DIY project, perfect for home brewers. The iSpindel integrates seamlessly with Craftbeerpi 3.0 and works great.