DSO138 Case parametric

thingiverse

Tested out a case for the DSO 138. It had a lot of "likes" and thousands of "downloads" but didn't fit properly both front and back. Buttons and sliders could not be moved, and the circuit board did not fit either. This is clearly due to my cheap Chinese printer. I also wanted to try out a new board. The HW-357 (at least that's what it says) has a charge controller and step-up converter all in one board. It's as compact as it gets. However, there's the catch - you have to switch the connection to the 18650 or the circuit board will drain the battery dry. That means the device must be powered on just to load the 18650. The 18650 I used comes from a repurposed battery pack and had solder tags on it already. If your battery doesn't have this, you'll need to clamp a piece of sheet metal in place. Since there are plenty of cases out there, I decided to try my hand at designing something new - the Swiss Army knife style. This design has enough room to store the connection cable as well. So that your DSO 138 fits perfectly regardless of your printer, I designed the script largely parametrically. For the joints, I used M4 screws and for the DSO138, I opted for M3 screws. I also glued the HW-357 board and its lid in place securely.