Case for GM328A component tester

thingiverse

Case for GM328A component tester, a variant based on Markus Frejek's universal transistor and component tester, later improved by Karl-Heinz Kübbeler. A full description of the project is available at mikrocontroller.net/articles/AVR_Transistortester. This case fits the variant with graphical display and one test button sold by Banggood as GM328A. The case includes a compartment for the battery, and the 14-pin ZIF test socket pinout is printed on it for reference. There are many different variants of this tester available in the market. To assemble the top and bottom sections, you need four M3x16 screws (or similar). It's recommended to thread them first using an M3 tap. The inner structure of the press button requires precise adjustment to achieve the right height. You may need to clean it up or add thin shims for a proper fit. Additionally, there is a 'knob_fudge' parameter that can be used for fine-tuning. Please carefully examine the pictures of the PCB to ensure you have the correct one before starting your print. Cases for other variants with similar designs are available at http://www.thingiverse.com/thing:797733, http://www.thingiverse.com/thing:694790, and http://www.thingiverse.com/thing:1580922.