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Sencore transistor tester12/17/2023 These are old school very high quality meters that last forever. You can get used one from eBay for around $40. To test transistors and MOSFETs I recommend Sencore TF-46, it meausre bias (go, no go) and leakage. Over 20V will instantly destroy a MOSFET gate, and when you check the breakdown voltage of capacitors, that will destroy the capacitors as well. I have been tempted by those high voltage tester, but the voltages are potentially dangerous, especially when you are voltage testing capacitors, and you can easily damage devices. Alternatively, you set up a power supply or two with some resistors, and make a temporary test rig for the device under the operating conditions that you need. Past that, you have to start looking at a curve tracer if you want useful parameters for devices. A MOSFET should look like a diode source to drain, and the gate is an open circuit. See the thread on it: In general, if a transistor looks like two diodes on the diode range of your multimeter, it is almost certainly working. If anybody has anything else can they please recommend? Now my final question, which I should of probably mentioned before is whenever this is a useful piece of equipment to have in a lab.įor the transistor tester, it is hard to beat the AVR based one. ESR: ] Looks cheap and poor quality? OR There is a separate thread about this one: Are any of these good? I assume I may have posted some which are poor quality, but these are just the main ones that I could find. Semiconductor: Measures only BJT? OR Looks ugly! Semiconductor and ESR: ] Ugly. Below are a few examples of what I had found. So I had a link bookmarked for a while now, perhaps a future project, which was this semiconductor tester using an ATMega8: I am thinking should I construct this or not? Perhaps it will be too much of a challenge for me, never done micro controllers, display and circuitry with so many connections! So then I decide to visit eBay an come across three choices, a pure semiconductor tester, a semiconductor tester with capacitance and ESR, just an ESR meter. My meter is hopeless at measuring capacitance and transistors so I was thinking that before I invest money into a meter, perhaps I should consider buying a semiconductor tester specifically for the use of testing various transistors that I have. In one of his videos (can't remember which) Dave mentioned the fact that only cheap multimeters measure capacitance and BJT transistors. I have been planning to buy a proper multimeter for a while now and I am going to do so soon.
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