I wanted to cad some tank tracks… so I did.

March 28, 2020February 28, 2025

Reduce Reuse & Recycle

Most battery packs that die tend to only have a single cell that is actually bad. A lot of the times the issue is the IC and not all the cells are sill useable. So I went to a good will and asked offered a crazy low price for a whole box of batteries. They agreed and I got to cracking them open.

After separating the 18650 cells, they each go through three tests independently. The tests determines the cells internal resistance, how much capacity it hold, and if there are any internal shorts.

Each cell is labeled with the date, the capacity rating, and it’s current charge. To be extra safe I let them sit for a month and discarded any that dropped more than 0.1 volt.

I used https://www.repackr.com/ to make sure each of the sets of ten 18650s in parallel are balanced in capacity.

July 3, 2018July 4, 2023

Recent 3D Prints

I am back!

It has been over two years since I have last made a post and I apologize. I plan is to start posting regularly again and set a goal for myself to post atleast once a week. Here are some 3D Prints I have done in the past few months.

7 Turn Helical 5.2Ghz

I broke the center column of my [wikilink]helical antenna[/wikilink] so I found a model on thingiverse and printed it off. It was much easier the guide the wire through all the holes and only took 1 hour to print and build. #Frugal

7 Turn Helical 5.2Ghz

My Entry Micro Brushed Microdrone

I love the tinywhoop but I no longer fly with Spektrum Transmitters any more. I do love a new project so I found a model of Thingiverse again and when to town. This drone has inspired me to design my own sub 100mm brushed frame. More on that to come 🙂

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