Here is a much improved version, newer than mine. Also much better photos and description of functions. http://www.ebay.com/itm/2017-... <http://www.ebay.com/itm/2017-Transistor-Tester-TFT-Diode-Triode-Capacitance-Meter-LCR-ESR-MOSFET-Case-/172445937608>
Looks like the key eBay search term is "2017" The above link might be to a kit but they come assembled if you look. I doubt the seller speak English the text looks like automatic translation from Chinese On Sat, Aug 12, 2017 at 1:46 PM, Chris Albertson <albertson.ch...@gmail.com> wrote: > > > >> A gismo called a Capacitor Wizard, around $200 from a guy in Kansas City >> does the definitive such test, measuring the equivalelent series >> resistance, aka ESR, and any capacitor that reads over 2 ohms ought to >> be replaced. > > > While on the subject of test equipment. I just got one of these things. > Highly recommend > > Not "definitive" but also much less expensive at only $10 is those "three > terminal testers" that are all over eBay. Measurement error varies but > generally it's "a few percent" > > Here is what it does... basically "magic" > > Place ANY device in the meter, a resister, cap, inductor FET, NPN bipolar, > DC motor or light bulb what ever you have in the junk drawer, I does not > matter in what order you place the transistor leads and the meter will > identify and characterize the part. The meter has three input terminals > so you can cone any device that has up to three leads. > > So I pull a random stepper motor out of my box of salvaged parts and the > meter tells me that (1) It found a coil and the coil's inductance and > resistance > > Then I place a capacitor on the meter and the meter tells me that (1) if > found a capacitor and its value and ESR > > Next I try a diode and the meter tells it it's a diode and which way I've > connected it and the forward drop and the gate capacitance. > > Then I pick up some random little metal can with three leads coming out > the bottom and the meter (1) tells me I have an NPN bipolar transistor and > (2) tells me which lead is which and characterized the transistor for me > giving hFE > > Then I find some other random part and it tells me I have an FET and IDs > the part. > > Costs $10. > > It is totally open source design with schematics and source code available > so you can see how it works. > > Here is one random eBay seller -- there are MANY. > www.ebay.com/itm/Digital-LCD-GM328A-Transistor-Tester- > Diode-Triode-LCR-ESR-Meter-MOS-PNP-NPN > <http://www.ebay.com/itm/Digital-LCD-GM328A-Transistor-Tester-Diode-Triode-LCR-ESR-Meter-MOS-PNP-NPN-V2KC/331725213315?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D45703%26meid%3D811367f004244e74ba2aa439641b7ad1%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D201393618873&_trksid=p2047675.c100005.m1851> > > -- > > Chris Albertson > Redondo Beach, California > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
