Products > Test Equipment
New (toy?) DSO+LCR meter - Fnirsi DSO-TC2 (june 2022)
KungFuJosh:
--- Quote from: indman on May 27, 2023, 07:08:09 am ---No, this figure shows the weather on Mars or something similar
--- End quote ---
The weather is only 0.11 ohm on Mars?? No wonder them billionaires can't resist going there.
--- Quote from: Aldo22 on May 27, 2023, 09:20:05 am ---I also have some sympathy for this little device because it looks cute, but if we're honest, it's not really good at anything.
Max 100kHz? A $3.90 DIY SG can do 1 MHz with adjustable amplitude.
A $62 DSO1511G has a 2MHz Signal Generator.
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Range doesn't make a thing good or bad. The question is what is it good for. I test audio equipment, and that's almost always a 1K sine wave. So it would be perfectly acceptable for that. I don't expect it to compare with my SDG2122X, and I don't expect the scope to compare with my Siglent scope either. But as toys go for $50, it's pretty cool.
I'd say it's okay at a few things. The AWG is okay for the range I actually need. I'll probably almost never use it for that anyway. The DSO is okay for basic uses or screwing around, also won't likely use it much. I mostly bought the thing because I like the transistor tester, which appears to be at least as good or better than the TC1. The rest is just extra fun stuff.
Two things I like better about the TC3 than the TC1: 1. nicer screen, 2. last test persists on the screen instead of the device shutting itself off. That's useful if you need to record data for comparison.
My curiosity will make me try the TC3's DSO when I find something with a parasitic oscillation, just to see how it performs on something useful. Maybe won't even be able to see the PO based on the frequency range, but that won't make trying less fun. 😉
Aldo22:
@KungFuJosh
If it helps you, then good for you.
If you have better equipment and it's just a toy for you, then good for you.
I just don't think that $50 for the TC3 is a very good investment for someone who wants cheap basic equipment, because in the end it just doesn't do enough for that money.
I wouldn't recommend it to anyone who wants basic equipment for less than $100.
Of course, it's not so expensive that you would seriously regret buying it, but there are better devices out there for just a little more money.
And honestly, I find the worst thing about the TC2/TC3 is not even the very limited bandwidth but the almost-1-button operation of the oscilloscope drives me nuts. :scared:
KungFuJosh:
--- Quote from: Aldo22 on May 27, 2023, 03:02:23 pm ---Of course, it's not so expensive that you would seriously regret buying it, but there are better devices out there for just a little more money.
And honestly, I find the worst thing about the TC2/TC3 is not even the very limited bandwidth but the almost-1-button operation of the oscilloscope drives me nuts. :scared:
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Yeah, it's pretty goofy to operate in scope mode. It's also a little disappointing that you can't control (or I haven't bother to figure out how to control) the signal generator while using the scope mode. In scope mode it just puts out the square wave to calibrate probes.
I think it's hard to recommend many products under $100 that do most of the features. I'd say the TC1 is a much better investment for transistor testing. There are lots of similar signal generators in that price range. But I've never seen a scope I thought was really useful for less than at last $250, but personally nothing I like under $500.
As I said, for me it's just a toy. Good for me. 😉
Aldo22:
Hi KungFuJosh
--- Quote from: KungFuJosh on May 28, 2023, 02:53:10 am ---I think it's hard to recommend many products under $100 that do most of the features. I'd say the TC1 is a much better investment for transistor testing. There are lots of similar signal generators in that price range. But I've never seen a scope I thought was really useful for less than at last $250, but personally nothing I like under $500.
--- End quote ---
Opinions differ on what a "useful" scope is. ;)
But we're talking about entry level / lowest budget here.
What I can tell you with certainty is that a DSO1511G is at least a 20 times better scope than the TC2/3 in every aspect for only about $10 more.
It has dedicated buttons for time base and vertical sensitivity. That alone is a relief.
Of course, it's not a $200+ scope, and it shouldn't be compared to those, and maybe the specs are a bit "optimistic", but compared to the TC2/3 it's very usable.
Check out the video from "Adrian's Digital Basement".
He simply uses it as a tool to repair the C64. The video is fun to watch.
https://www.eevblog.com/forum/testgear/dso1511e-review/msg4507981/#msg4507981
ober:
--- Quote from: indman on June 12, 2022, 08:16:38 am ---I'm not 100% sure, but it looks like Chinese friends ported Karl-Heinz's original code to the STM platform.
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This comment was about the DSO-TC2. The DSO-TC3 also seems to have some porting effort behind it.
The results, unfortunately, are not pretty.
Here is a "10 µF" ceramic capacitor in a TC1 and in the DSO-TC3. Note that the TC3 hallucinates an additional pin!
(You get the same hallucination about the third pin independent of where you put the actual pins.)
Apparently the DSO-TC3 measures itself... (And note the Rds and Cg values :-)
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