I spent 6 months working as a design engineering co-op at Cirkul touching on a broad range of topics including test fixtures, quality acceptance gauges, consumer good part design, and injection mold tooling approval. 

The objective here is to test for catastrophic failures when filling a chamber with pressurized fluid over and over again. The polycarbonate enclosure contains two solenoids responsible for the filling and emptying of the chamber, a pressure switch for displaying the current pressure and alerting the control system when to fill and empty, sounds absorbing foam, and a display to show the current cycle number and if there was a failure. The logic for the system was coded in Arduino IDE and uploaded to an Arduino Nano which is contained in a small plastic enclosure with the necessary circuit board and power supply. Five of these assemblies were built and tested to 10,000 cycles.

This fixture was designed to open and close a lid cap repeatedly to determine where both the opening and closing mechanisms would fail. Using an extruded aluminum frame, this fixture incorporates two flow solenoids, air pistons, a display, a power supply, and a potentiometer to determine whether the cap is open or closed. The logic for this fixture was compiled in Arduino IDE. Three of these assemblies were built and have now tested over 10,000 cycles.

This shock sleeve was developed and owned by me in anticipation of the release of a 42oz metal bottle. I worked with an overseas manufacturer to create a single aluminum prototype tool and then a final production tool. All CAD and manufacturer communication was done by me. The final order quantity for this product is in the thousands range.