I have one of these and the manual isn't really helpful and haven't been able to figure out how to use it. Everything i plug in all it shows is the top v. Everything else stays at zero. How do I 1) Test to see if a USB hub port is bad (for example) and 2) how to test to see if usb cable is bad? Thanks
Could be that the Samsung phone is doing a trickle charge since it is almost full (96%). I guess if the phones battery was at 40% it would show a full charge mode.
Out of curiosity... is there some sort of switching going on with the fast charge circuit? That would be my guess for the rapid changes in voltage, and possibly the loophole for rapid charge, to get around the charge limits for lithium batteries?
You mean when the phone was plugged in? I suspect (after observing it a bit more) that was because the phone was at 90+% charge when I plugged it in. It seems to be more constant when the batter is a bit lower
Considering it only has one shunt resistor it probably can't monitor both connections. Unless it switches between them rapidly, but I find that unlikely.
@@pileofstuff Let's just hope it handles that gracefully and doesn't just like connect the input power rails together or something like that... Though I think Uni-T should know enough about input protection.
I made a comment already a few weeks ago, but it seems TH-cam has hidden it. Anyway, I looked up the sonix sn8f57082 and it's just an 8-bit microcontroller. Since it has a 12-bit ADC built-in, it's entirely possible it's what does the quantization of the voltage and current sensing. Interestingly, I opened my UT658DUAL out of curiosity and they had obfuscated the IC. I seems they're worried about clones. To me it looks like the code for the glop-top chip printed next to it is HT61C23, but that doesn't reveal anything useful. If it's an SoC, I wonder what that little 8-bit MCU does. Anyway, not a bad little device. It might be a bit primitive, but I like it.
It is a great failing that the UNI-T UT658 does not remember the last mAh results. For example, test a USB power bank via the UNI-T UT658 and a load on the output of the UNI-T UT658. Discharge until the power bank switches off, now you know the capacity of the power bank, at least you would know if the UNI-T UT658 remembered the last mAh total, but it doesn't. As soon as the power bank runs out of power and switches off, the UNI-T UT658 forgets all the previous readings! Some very much cheaper USB testers do remember the last mAh total, if only the UNI-T UT658 did because it would make it an awesome piece of test kit, but because it just forgets all the last test results when the power is switched off to it, it makes the UNI-T UT658 a rather ineffective piece if test kit if you want to test the capacity of USB power banks using it.
Huh so not really anything special about it, I guess. The size could be a pro or a con, depending on personal preference (too clunky for me). What it's definitely missing (and so are the other ones you showed) is information about the QC/PD standard used. I have two that also show that and it was pretty helpful in figuring out which of my devices and chargers want which quick charging protocol they want.
Good video "pos" I have a question and a comment, firstly, where did you buy the nifty little electric screwdriver? and like most people we had a house full of plug in USB chargers, all were for different items and worked with a variable degree of charging capabilities. So I built my own USB six port charger, with premium over rated components and it will charge everything we own "quickly"
I got one after he reviewed it. It is really handy although a bit low on torque. But it also has a clever clutch that allows you to apply wrist power to get stubborn screws started. Definitely a "must have" tool.
Turns out the Uni-T USB tester is a bit of a non-product, no one asked for it and we got it. I'm sure we'll find a place for this little tester. Hopefully somewhere nice and melty warm ;) ;) ;)
Sure, it may well be the best one, but my tendency here is to try and demonstrate the devices with the most beginner/hobbyist friendly price. The UM25C may be better, but it's also triple the price. How much difference does that extra few percent of quality matter to a hobbyist on a budget?
@@pileofstuff I can see his point. I got the UT658c (one in/out only) than struggle with finding adapter that fits with my cable and hardware. The sucky part, as more adapter you add as more failure and measurement flaws you add. There the bunch of integrated connector options would be a great help. Especially an hobbyist is probably not aware of this and therefore can not make a good use of an device thats to simplific equipped. Not even talking about the most useful feature, saving the data. It really gives me a hard time to figure out how that works. In fact, I am still looking after reading the original manual and also downloading an manual in my native language. Ihoped to find some information in your video ... maybe the next one you make ;-) P.S. Data saving would be most helpful if the power source (testobject) is an powerbank. Since they switch of the power after running off. This causes all measurement about capacity of my testobject to get lost :-(
That UNI-T device is rubbish. Any USB tester purchased now days needs to have QC and PD Protocol Detection, and preferably also have Protocol Trigger built in. AND why peel off the factory screen protectors, and why be so damn smug about it? You like your screens all scratched up, huh?
The screen protector peel is a common internet joke. And I like to play with that joke. Most people seem to enjoy it (including several in this video's comment section)
@@johndii2194 - Recently I saw a video on another electronics channel with a review of a multimeter. He did the same silly joke about removing the factory screen protector, then later in the same video he stated that the large LCD screen would likely get scratched and that he would need to cut down a phone screen protector for it. In the summary he also recommended that viewers buy a protector.
@@johncoops6897 Nah, you're taking this way too serious; first I thought you were just making a bit of a shit joke, now I realise you're just being a bit of a dick.
![[LIVE] : ONE ลุมพินี 89 | คู่เอก "ยอดไอคิว vs คิริลล์"](http://i.ytimg.com/vi/Z3vYkHJ_5Ig/mqdefault.jpg)
That screen peel was pure Gouda.
🦴 I love your mini hand pointer stick!
Yeah, looks like Mickey Mouse is pointing at stuff.
Do you have the stl file for that?
Would love to print one for myself.
I have one of these and the manual isn't really helpful and haven't been able to figure out how to use it. Everything i plug in all it shows is the top v. Everything else stays at zero. How do I 1) Test to see if a USB hub port is bad (for example) and 2) how to test to see if usb cable is bad? Thanks
The first mistake I made was connecting the cable end to the source - but that's the output.
The input is the female connector end.
Could be that the Samsung phone is doing a trickle charge since it is almost full (96%). I guess if the phones battery was at 40% it would show a full charge mode.
You need to give a bit more warning before peeling so we can lower the lights and get the "mood" right.... ;-)
Out of curiosity... is there some sort of switching going on with the fast charge circuit? That would be my guess for the rapid changes in voltage, and possibly the loophole for rapid charge, to get around the charge limits for lithium batteries?
You mean when the phone was plugged in?
I suspect (after observing it a bit more) that was because the phone was at 90+% charge when I plugged it in.
It seems to be more constant when the batter is a bit lower
@@pileofstuff Ah, so the phone was "undecided" whether to stay in fast-charge mode?
@@markfergerson2145 That's my theory.
Hi did you ever Do a follow up video on changing the usb c port as you said in this video. Thank you
I didn't modify the tester. I got a USB-C power supply (well, a few of them...) so I could use the tester the way the manufacturer intended
@@pileofstuff ok thanks. Great video anyway.
I have 3 of those 'cheap' testers = the ones you have and one with a dual (Red/Blue - A/V) display.
I can't recall from the other video- is this unit able to utilize and monitor both pass-through circuits or are we limited to one or the other?
Considering it only has one shunt resistor it probably can't monitor both connections. Unless it switches between them rapidly, but I find that unlikely.
I'm not 100% certain. I have ordered some USB-C sources for future testing.
@@pileofstuff Let's just hope it handles that gracefully and doesn't just like connect the input power rails together or something like that... Though I think Uni-T should know enough about input protection.
5pin part is a buck voltage converter. The ic is a adc. And rest are transistors or fets. And resistors and capacitors
I made a comment already a few weeks ago, but it seems TH-cam has hidden it.
Anyway, I looked up the sonix sn8f57082 and it's just an 8-bit microcontroller. Since it has a 12-bit ADC built-in, it's entirely possible it's what does the quantization of the voltage and current sensing. Interestingly, I opened my UT658DUAL out of curiosity and they had obfuscated the IC. I seems they're worried about clones.
To me it looks like the code for the glop-top chip printed next to it is HT61C23, but that doesn't reveal anything useful. If it's an SoC, I wonder what that little 8-bit MCU does.
Anyway, not a bad little device. It might be a bit primitive, but I like it.
I bought two of these and it always reads 0 amps :(
Does it really matter if it's a cob or some unknown ic / mcu with closed source code
Either way can't do anything when it loses it magic smoke
It offends my curiousity more than anything.
It is a great failing that the UNI-T UT658 does not remember the last mAh results.
For example, test a USB power bank via the UNI-T UT658 and a load on the output of the UNI-T UT658. Discharge until the power bank switches off, now you know the capacity of the power bank, at least you would know if the UNI-T UT658 remembered the last mAh total, but it doesn't. As soon as the power bank runs out of power and switches off, the UNI-T UT658 forgets all the previous readings!
Some very much cheaper USB testers do remember the last mAh total, if only the UNI-T UT658 did because it would make it an awesome piece of test kit, but because it just forgets all the last test results when the power is switched off to it, it makes the UNI-T UT658 a rather ineffective piece if test kit if you want to test the capacity of USB power banks using it.
Huh so not really anything special about it, I guess. The size could be a pro or a con, depending on personal preference (too clunky for me). What it's definitely missing (and so are the other ones you showed) is information about the QC/PD standard used. I have two that also show that and it was pretty helpful in figuring out which of my devices and chargers want which quick charging protocol they want.
Yeah, when it was described as quick charge compatible i was hoping it would identify it, rather than simply tolerate the voltages.
Good video "pos" I have a question and a comment, firstly, where did you buy the nifty little electric screwdriver? and like most people we had a house full of plug in USB chargers, all were for different items and worked with a variable degree of charging capabilities. So I built my own USB six port charger, with premium over rated components and it will charge everything we own "quickly"
It's called a "wowstick". I got it from banggood.
There is a link in the description of this mailbag: th-cam.com/video/5SgbEVaPIh8/w-d-xo.html
I got one after he reviewed it. It is really handy although a bit low on torque. But it also has a clever clutch that allows you to apply wrist power to get stubborn screws started. Definitely a "must have" tool.
@@kirkb4989 I find it the most handy with machine screws. Especially really long ones.. Self-tappers drag it down too much.
Turns out the Uni-T USB tester is a bit of a non-product, no one asked for it and we got it. I'm sure we'll find a place for this little tester.
Hopefully somewhere nice and melty warm ;) ;) ;)
At least the screen is easier to read than the cheap little ones.
And it doesn't drop quite as much voltage across it.
Hi..! Where are you from? Good vídeo!!!! Greetings 👋🏼 🇦🇷
UM25C is the best one out there, highly accurate voltage measurement and lots of settings/measurements. Better than all 3 of those combined.
Sure, it may well be the best one, but my tendency here is to try and demonstrate the devices with the most beginner/hobbyist friendly price.
The UM25C may be better, but it's also triple the price.
How much difference does that extra few percent of quality matter to a hobbyist on a budget?
@@pileofstuff I can see his point. I got the UT658c (one in/out only) than struggle with finding adapter that fits with my cable and hardware. The sucky part, as more adapter you add as more failure and measurement flaws you add. There the bunch of integrated connector options would be a great help.
Especially an hobbyist is probably not aware of this and therefore can not make a good use of an device thats to simplific equipped.
Not even talking about the most useful feature, saving the data. It really gives me a hard time to figure out how that works. In fact, I am still looking after reading the original manual and also downloading an manual in my native language. Ihoped to find some information in your video ... maybe the next one you make ;-)
P.S. Data saving would be most helpful if the power source (testobject) is an powerbank. Since they switch of the power after running off. This causes all measurement about capacity of my testobject to get lost :-(
Why builtin cables ughh
It's a shame that the USB A and USB C are isolated.
Agreed. I was hoping it could use any combination.
Jup
@@pileofstuff Jup
That UNI-T device is rubbish. Any USB tester purchased now days needs to have QC and PD Protocol Detection, and preferably also have Protocol Trigger built in.
AND why peel off the factory screen protectors, and why be so damn smug about it? You like your screens all scratched up, huh?
The screen protector peel is a common internet joke. And I like to play with that joke. Most people seem to enjoy it (including several in this video's comment section)
I have a friend who leaves the screen protector on as long as he can. I can go either way.
@@johndii2194 - Recently I saw a video on another electronics channel with a review of a multimeter. He did the same silly joke about removing the factory screen protector, then later in the same video he stated that the large LCD screen would likely get scratched and that he would need to cut down a phone screen protector for it. In the summary he also recommended that viewers buy a protector.
@@pileofstuff- yes, I know it's a internet joke. But it is moronic one. Peel them off 7 segment displays, sure.
@@johncoops6897 Nah, you're taking this way too serious; first I thought you were just making a bit of a shit joke, now I realise you're just being a bit of a dick.