Rat Rig Rat Pack -- self-sourced version for US

Wanted to integrate the Rat Pack, but the cost of product and shipping was over $70 USD -- not really in the budget.

Found a WINSINN 2 pin fan for about $13 and HEPA filters for $16.

Rat Rig's custom fan uses 3 pins, dual connectors. Necessary for PWM control, but I couldn't find any 3 pin fans at all to replace it. Just 4 pins and 2 pins. So we're using a 2 pin fan to keep things simple. This also means we're going to have use our own firmware configuration, we can't really drag and drop Rat Rig's.

Add this your to printer.cfg:

# Rat Rig Rat Pack
[include filtration_control.cfg]

Upload my filtration_control.cfg to your config directory in RatOS. Make sure to change the pin to whatever pin you have it plugged into on your control board

My config is built RatOS 2.1 RC2. It may “just work” for Klipper, but I don't know about RatOS 1.x; please be familiar with what you're doing and make changes accordingly.

This blower seems pretty quiet, especially when compared against the BentoBox.

I don't know how well the TPU O-ring will perform in comparison to a real o-ring. A VarioShore TPU print might work better. But so far it seems fine with standard TPU95. The softer the better, I think. I couldn't find any relevant o-rings to buy locally or online.

BOM:

1x Hunter F1715HE5 True HEPA Replaceement Air Purifier Filter 2-Pack for Model HT1715
So far I've been using this filter for a few days and no rust.

1x WINSINN DC 120mm Blower Fan 24V 12032 Dual Ball Bearing Brushless Cooling Turbine Turbo 120x32mm 2PIN

1x compatible o-ring, or replaced by TPU-printed o-ring

Everything else, visit https://docs.google.com/spreadsheets/d/1NqMVrtidjkDrUk56S6zbJtgYB8lJClbSmyaEXHVOfCo/edit?gid=0#gid=0