There is this cheap and amazing component tester, that works on transistors, LEDs, inductors, capacitors, resistors, diodes, among a few others, you can get one here. It can detect the component and give you their basic properties. For instance, it can give you LCR meter readings, distinguish between BJT and MOSFET transistors, NPN or PNP transistors, detect their gain and threshold voltage, measure a diode’s forward voltage and so on. It’s quite useful! But it has a small problem, its quite annoying to use because it usually comes in just a PCB, so I decided to design a 3D printed case for it.

Even though it’s a very useful tool to have, if you are dealing with electronic components in daily basis, it’s a bit weird to use like that. Not to mention that sometimes your fingers touch the soldered pins on the back and mess with the readings. Most manufactures also sell an acrylic box, but it’s so stupidly large and unpractical that I can’t even consider it. Besides the SMD transistor footprint on the front is just ignored and inaccessible in those cases, which is disappointing. Therefore my thought about designing a case for it that could be 3D printed. I’ve designed it in a way to be comfortable to be held and easy to print. Made of 4 separate parts, the back, the top, the middle ring and the button, it’s put together with 4 M3 screws and 4 nuts.

Anyways, if you are interested in learning more about it you can check it on my blog and if you would like to get this tool yourself, you can also get it here.


João Duarte

One of the founders of eLab Hackerspace! Post-Graduate with a Specialization in Electrical and Electronics Engineering. Some of his interests include digital fabrication, home automation, robotics, high voltage and chemistry.

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