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Reviewed in the United States on March 9, 2025
This little box does a nice job of identifying and giving accurate component values. Very handy for getting the pinout of unknown transistors.
Caroline Frumkin
Reviewed in the United States on January 18, 2025
Does NOT automatically discharge caps. I have forgotten to discharge several times and in 2 cases, fried this thing. It works great. But I will be going with one that does discharge so I don't have to remember. Also, it was a pain to put this together for the first time. I ended up gluing as I went along. And you still will need to take it apart to replace the battery.
dram56
Reviewed in the United States on May 18, 2024
Crazy good deal for what it does.Pick up a set of leads (small pin to alligator clip). Great for quick checks on resistors, capacitors, transistors & diodes.
Fred
Reviewed in the United States on December 20, 2024
Good Little Transistor Tester-It was a little difficult to assemble but It very awarding to see how nice it looks after I assembled the enclosure.I installed a fresh battery and I tested a NPN and PNP transistor and it worked great.
Donald W. Kennedy
Reviewed in the United States on December 13, 2024
What a piece of crap! I tried to test a 1 K resistor, pushed the button, the screen lit up for 2 or 3 seconds then went dark. No amount of fiddling with it brought it back. It is completely and totally DEAD. I am seriously considering dropping Amazon altogether. Why do you people pass on such junk??
Breakerbroke23
Reviewed in the United States on December 1, 2024
This is a great little device to have around the shack. If you are testing caps remember to ALWAYS discharge before using in the tester. Ask my how I know. The first one would not give ESR value so I sent back to Amazon, 2nd one same thing. Not sure what is going on with that but everything else works as it should.
TD
Reviewed in the United States on August 25, 2021
Sorry this is a bit wordy, but it is for good reason.My review is based on perspective obtained from making my living repairing and designing circuitry in electronics products.Before I purchased this little gem, I saw reviews making critical comments about the contrast, the “supposed” issues with the plexiglass case, having to open the case when replacing the battery and so on.As someone who has worked on countless products, I thought it would be interesting to check out not only the operation and accuracy of this unit, but also why people complained about breaking or having to modify the case to fit, the contrast and so on.Being no stranger to quality test bench gear, I was very surprised at the quality and accuracy of this unit!For a mere $13, you get a transistor, diode and capacitor tester, unheard of just a few years ago. Electrolytic and tantalum caps are the worst offenders in the capacitor-world and this product does an excellent job of reporting their capacitance value AND ESR value!I had absolutely no issues with the case either….all pieces fit and interlocked together and it took maybe 10 minutes to get it together, most of that time was spent peeling off the protective covering!I found the contrast to be very acceptable and you can always change your viewing angle of it doesn’t suit you. You’re only needing to look at the screen for a few seconds anyway so I consider this anothernon -issue.Replacing the battery does requires removing the top of the case, but this unit times-out 30 seconds after a test so battery life should not be an issue, and when you do, it takes 5 minutes….remember, this cost $13 and does things a MUCH more expensive unit does. I’m not saying you’ll never need any other test gear, but I am saying those who complain are probably weekend “tech” folks who are relatively inexperienced and can’t grasp the value this very inexpensive unit represents because they’ve never spent big money on test gear in the past, so they have a limited perspective……and if it dies in 6 months which I doubt, it was still worth it and I would purchase another one.For $13 you have a couple of choices, buy this or buy a couple of Fru Fru Lattes and see which one is around the next day. Enjoy! (see photos)
White
Reviewed in the United States on November 20, 2019
Exactly what I was expecting. I had read and watched various reviews - including the one from Dave Jones at EEVBlog - and I was convinced it was worth picking one up. Especially important when one has a box of no-brand transistors and different manufacturers wire the emitter, base and collector differently for the same model.The included case and local US Prime delivery made this one worth the extra few dollars over getting one on ebay.Works great. I have been using it on the bench for doing some transistor and capacitor testing as well as some resistor categorizing from a grab-box I picked up recently. (Yes - I can read color codes ;-) but sometimes the bands on metal film blue cases can be tricky to distinguish for some colors). Seemed to fare pretty well compared to my digital multimeter.Make sure you follow the calibration instructions which you can find in various YT videos: in essence, hold down the button, short 1,2 and 3 with something - I used two breadboard jumpers - and then put in a capacitor when prompted.Above that - hats off to the vendor :-) The case had a small crack in the front plastic piece. I contacted them with pictures showing the issue and they didn't just send me a new front piece but a whole new unit. Excellent customer service - THANK YOU!
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