This is a case for a low cost electronic component tester/identifier commonly found on ebay (and other sources) which at the touch of a button can identify and measure capacitance, inductance, resistance, ESR, batteries, diodes (including LED's), transistors, thyristors, triacs, SCR's, etc.

If you are an electronics hobbyist and you don't have one yet I strongly recommend you get one (even if you don't print this case).

There are many variants so make sure you get the right one! This case is for the one which is based around the 12864 LCD, has a single button, works with both SMT and through hole components and runs on a PP3 9v battery. Check the photos to make sure you get the right one!

The dish in the bottom right is just a convenient place to store components while you are testing. It stops me losing SMT's on the floor!