FNIRSI DSO-TC3 Oscilloscope - 3-in-1 Handheld Oscilloscope & DDS Signal Generator & Transistor Tester, 500Khz Bandwidth 10MSa/s Sampling Rate, 6 Types of Waveforms, Transistors Measure

OK. I needed an inexpensive scope for occasional audio repair & field work. You need to have adapters to use the scope with standard BNC probe & gnd. connectors. The tester on the front panel I'm surprised is accurate for transitor/diode/res readings. Was unable to use the scope portion as there is a package needed with the probe & grd. lug to adapt BNC to the mini input connectors. The company said Amazon was responsible for any missing items as the shipper. Amazon insisted Fnirsi should provide missing items. To keep drama to a minimum I am returning the item as defective while Amazon ships me a replacement that hopefully has all I need to use the scope. Will add to my review when I receive a complete unit. Really hated returning it as the semiconductor front panel test portion was very accurate & hoping the replacement is equally accurate. OK so I returned the unit that was missing certain items & just received the replacement DSO-TC3. It had all the items that were missing from my original order. I give the front panel semiconductor test a try & am impressed by the accuracy & ease of use. As an added bonus I didn't know it also had an infra-red device tester that not only verifies if the TV or stereo remote is working but also gives you all the codes. I give this a 5star plus for these features. I haven't tested the scope probe yet but I'm sure it'll work fine within it's parameters. Good for audio but may not for RF work but then again it's specs weren't designed for those frequencies. Overall I am very satisfied & would recommend this for anyone who tinkers with electronics. This device does quite a bit for it's modest price.

I have 6 oscilloscopes, now 7 scopes with this one. It was purchased for its semiconductor testing feature. This feature works quite well with transistors, Fets, diodes and similar. The specs claim that it can check capacitors down to some 25 Pf. The unit I have won't recognize any capacitor smaller than about 300 PicoFarads. I like its ability to recognize any three pin semiconductor, even though you insert it forwards or backwards. Then it displays lead connections, and for transistors, its gain.

I was skeptical when seeing the $40 price, but this is a great value. The component tester is equivalent to the standalone component testers seen elsewhere on Amazon. The 500Khz scope is decent. The auto function responds quickly. The signal generator is also decent. The triangle, ramp, and pulse waveforms degrade slightly at higher frequencies, but this could be the probe. The unit comes with a variety of leads, a x10 OS probe, a charging cable, and decent manual. All in all, I am very pleased (and surprised). Highly recommended. For about $25 more, there is a 10Mhz version. (DSO-TC4)

Update, 08/31/2023: this is an update to my recent review. I got the cables with the help from the FNIRSI company themselves. They've been very kind to help me out and provide the cables that were missing from the original order. The unit is all there now. Like I said the unit works fine when I was using it as a test for components. Now that I have the cables I can test the other two options, the oscilloscope and the signal generator. :-) Thank you again to the company FNIRSI, for your support Original review---- Although the unit was brand new and still sealed, there is not fully usable . I was able to test various components. And it worked fine. I really liked unit because of that function. When I tried to use the oscilloscope mode or the function generator mode, I noticed that there was supposed to be some cables to go along with it and the little adapter that hooks the cable to the top three connectors. But there was none. So I cannot use this to its full potential. If yours did not come with any of the parts circled in red in the included picture that I'm missing, I like to know how I can get replacements for the missing parts?

The title says it all. It doesn't read Germabium transistors correctly. It either reads them as a resistor or some type of diode. Testing for the hFE of Germanium transistors was the main reason I got this. I already have a cheaper tester that tests everything else I would need to test, including some (but not all) of my Germanium transistors. I got this thinking that it would be an upgrade with some extra features, which it is and it does However, it does not do that one, specific thing I got it for, and I didn't find anywhere that mentioned this. So had to take off 1 star for that. Also, updating the firmware doesn't really work on my MacBook. It says in the directions I found that it "recommend" using a PC with Windows. Not a big deal because I also have a PC and laptop running Wibdows 11, but that's still another extra annoyance. So took off another star. It seems to measure everything else ok. I haven't really tried much other than the component tester and some of the features in its basic "Tools" section. So I can't really attest to how well the oscilloscope or anything else works. I do plan on learning to use an oscilloscope though, so I figured I could mess around with that a little. Otherwise, I'd probably send this back. Very disappointing. I don't normally do reviews like this, but I really wish I had found a review that mentioned these shortcomings before I bought this. That would have spared me a lot of time, money and frustration. So I felt it was my duty to let others know about all this. Mainly the fact that it won't measure Germanium transistors. That just seems like a very basic thing that pretty much any component tester should be able to do!

Es preciso para realizar tests de componentes

All functions worked as expected... Dso worked perfectly, dds worked (shown in the picture)

i'm an auto electrician, unfortunately the output signal skips/ hiccups and doesn't produce a clean and controlled signal. as im testing some delicate gauges and sensors i cannot risk using this item for its intended purpose. seller has refunded me the full cost of the item after requesting a refund.

We bought this for our son who loves tinkering with electronics. it was a gam changer as now he can properly test components, identify components and use the proper items in his builds, it is very well built and comes with all the connections and leads you will want to start trouble shooting, testing or building. In todays world it is an invaluable tool in your box. If you are sitting on a fence on this, get one you will not be disappointed.

Un instrumento imprescindible para el taller de electrónica, este pequeñín reúne las capacidades de cuando menos 3 aparatos muy útiles para el aficionado o profesional de la electrónica, su tamaño al ser prácticamente de bolsillo lo convierte en un aliado en el trabajo en campo. Lo único que me parece a mejorar es el tamaño del cable de las puntas ya que solo tienen 20 cms. Y limita mucho el poder medir cómodamente algunos componentes.