- 254
- 383 909
Uni-Byte
Canada
Приєднався 18 січ 2019
Electronics variety for the enthusiast.
Subscribe, it's free!
Ways You Can Help:
If you like the stuff I present or got any benefit from it, consider making a small donation through the PayPal link below.
Or, if you buy from Amazon or AliExpress you can use the links below to help the channel and it won't cost you a penny more!
Email Address for Business Purposes: onebytecpu@hotmail.com
Subscribe, it's free!
Ways You Can Help:
If you like the stuff I present or got any benefit from it, consider making a small donation through the PayPal link below.
Or, if you buy from Amazon or AliExpress you can use the links below to help the channel and it won't cost you a penny more!
Email Address for Business Purposes: onebytecpu@hotmail.com
Uni-Byte 0244 - Kaiweets KM601s Digital Multimeter REVEIW - I like it!
Kaiweets sent in this KM601s Smart Digital Multimeter for us to take a look at. 10,000 counts, auto-measurement and probe detection. Really nice feature set for a meter in this price range. And, other than a slightly slow continuity test, works like a charm.
Video Specific Links:
From Kaiweets: kaiweets.com/en-ca/products/km601s-10000-counts-smart-digital-multimeter?sca_ref=2995214.ZXrwGyn9Mp
From Amazon: amzn.to/421i0kn
Buying from Amazon or AliExpress? Use these links to help the channel and it won't cost you a penny more!
Amazon Affiliate Link: amzn.to/49GmnRV
AliExpress Affiliate Link: s.click.aliexpress.com/e/_DFiYIzD
Help support the channel directly.
Through PayPal: paypal.me/UniBytePP
Or click on the Super Thanks button above (heart with a "$" sign)
My uploaded projects at PCBWay: www.pcbway.com/project/member/shareproject/?bmbno=8EB135B5-5760-43
Subscribe: ua-cam.com/channels/FcYlNjwcvRDHLEMDS__YHg.html
#kaiweets #electronicsproject #multimeter @Kaiweets
Video Specific Links:
From Kaiweets: kaiweets.com/en-ca/products/km601s-10000-counts-smart-digital-multimeter?sca_ref=2995214.ZXrwGyn9Mp
From Amazon: amzn.to/421i0kn
Buying from Amazon or AliExpress? Use these links to help the channel and it won't cost you a penny more!
Amazon Affiliate Link: amzn.to/49GmnRV
AliExpress Affiliate Link: s.click.aliexpress.com/e/_DFiYIzD
Help support the channel directly.
Through PayPal: paypal.me/UniBytePP
Or click on the Super Thanks button above (heart with a "$" sign)
My uploaded projects at PCBWay: www.pcbway.com/project/member/shareproject/?bmbno=8EB135B5-5760-43
Subscribe: ua-cam.com/channels/FcYlNjwcvRDHLEMDS__YHg.html
#kaiweets #electronicsproject #multimeter @Kaiweets
Переглядів: 669
Відео
Uni-Byte 0243 - TWO Nice & Useful Little BOARDS For The Lab.
Переглядів 1,3 тис.12 годин тому
We look at a couple of interesting and cool little boards. One an educational kit, the other a dandy little tool. Video Specific Links: 555 FG Kit: s.click.aliexpress.com/e/_oko7l5v Resistance/Capacitance Reference Board: s.click.aliexpress.com/e/_olpZuv5 The FNIRSI 2C53T: Amazon: amzn.to/41bBna1 FNIRSI Direct: www.fnirsi.com/products/2c53t?sca_ref=6508821.tgJU0IfWaR AliExpress: vi.aliexpress.c...
Uni-Byte 0242 - VARIABLE DC Power Supply - REGULATOR Build & Test.: Part 2
Переглядів 98119 годин тому
New customers to PCBWay get a $5 discount: www.pcbway.com Another multi-part project design and build series. In this one we are going to design and build a variable DC bench power supply. In part 2 here we will build and test the voltage regulator for basic functionality, drop-out voltage and stability. In subsequent videos we'll add functionality and possibly put in a nice cabinet. Thanks to ...
Uni-Byte 0241 - Reviewing the FNIRSI 2C53T! Part 2
Переглядів 795День тому
Part 2 of our look at he the FNIRSI 2C53T 3-in-1 test kit. In this part we look at the 20,000 count DMM and teh Function generator. Video Specific Links: Amazon: amzn.to/41bBna1 FNIRSI Direct: www.fnirsi.com/products/2c53t?sca_ref=6508821.tgJU0IfWaR AliExpress: vi.aliexpress.com/item/1005006144235719.html Part1: ua-cam.com/video/lDQDeedr-0Y/v-deo.html Buying from Amazon or AliExpress? Use these...
Uni-Byte 0240 - Let's try out the FNIRSI 2C53T! Part 1
Переглядів 1 тис.14 днів тому
FNIRSI sent me this great looking 3-in-1 test instrument to have a look at. The 2C53T boasts an 2-Ch. 50MHz Oscilloscope, a 4.5 digit smart DMM and a signal generator. Let's have a look at it and see how it is. Video Specific Links: Amazon: amzn.to/41bBna1 FNIRSI Direct: www.fnirsi.com/products/2c53t?sca_ref=6508821.tgJU0IfWaR AliExpress: vi.aliexpress.com/item/1005006144235719.html Part 2: ua-...
Uni-Byte 0239 - Let's Build A VARIABLE DC Power Supply: Part 1
Переглядів 1 тис.21 день тому
New customers to PCBWay get a $5 discount: www.pcbway.com Another multi-part project design and build series. In this one we are going to design and build a variable DC bench power supply. In part 1 here we will look at some of the design considerations and the specification goals. In subsequent videos we'll build and test it, add functionality and finally put in a nice cabinet. Thanks to our s...
Uni-Byte 0238 - Mailbag #32: Even with a STRIKE, the MAIL keeps coming!
Переглядів 85621 день тому
A variety of new stuff to the lab from AliExpress, FNIRSI and Amazon. Video Specific Links: 555 FG Kit: s.click.aliexpress.com/e/_oko7l5v iSesamao Spudger: amzn.to/3ZRtPbk Female Banana Jacks: s.click.aliexpress.com/e/_onPU3hp Resistance/Capacitance Reference Board: s.click.aliexpress.com/e/_olpZuv5 Silicone USB Cable: s.click.aliexpress.com/e/_onRVi95 Ferules: s.click.aliexpress.com/e/_oF4VM2X...
Uni-Byte 0237 - What Happens If YOU do THIS to an LED?
Переглядів 7 тис.Місяць тому
Investigating an unusual ability of LEDs and how it can be exploited. Buying from Amazon or AliExpress? Use these links to help the channel and it won't cost you a penny more! Amazon Affiliate Link: amzn.to/49GmnRV AliExpress Affiliate Link: s.click.aliexpress.com/e/_DFiYIzD Help support the channel directly. Through PayPal: paypal.me/UniBytePP Or click on the Super Thanks button above (heart w...
Uni-Byte 0236 - Let's Build A VARIABLE DC Load: (it gets SORTED out) Part 4
Переглядів 844Місяць тому
New customers to PCBWay get a $5 discount: www.pcbway.com In this multi-part series we are going to design and build a variable DC load. In part 4 here we will address issues we met in Part 3, finish our testing and fine tuning, then we'll put in a nice cabinet. Project files are below. Project Files: drive.google.com/file/d/1_xmlmgfMopphqU6ln3_rC8tpNyU-tBf1/view?usp=sharing Part 1: ua-cam.com/...
Uni-Byte 0235 - A QUICK First Look: The ET4410 LCR Meter
Переглядів 977Місяць тому
I wanted a bit better LCR meter for my lab, so I picked this East Tester ET4410 up off AliExpress. I literally know nothing about except the specs. Let's play with it!!! Want one? ET4410: s.click.aliexpress.com/e/_mNQ6aWr Get ab extra $25 with an AliExpress Discount Code: $2 OFF For orders over $20 Code: 【IFPH0LN】 $5 OFF For orders over $50 Code: 【IFPBE9G】 $25 OFF For orders over $200 Code: 【IF...
Uni-Byte 0234 - Let's check a CLASSIC Fluke 8840A/AF DMM
Переглядів 689Місяць тому
New acquisition at Uni-Byte labs. We got this beautiful classic Fluke 8840/AF for $100 from a local vendor. Let's check it out! Buying from Amazon or AliExpress? Use these links to help the channel and it won't cost you a penny more! Amazon Affiliate Link: amzn.to/49GmnRV AliExpress Affiliate Link: s.click.aliexpress.com/e/_DFiYIzD Help support the channel directly. Through PayPal: paypal.me/Un...
Uni-Byte 0233 - AliExpress Electronics GADGETS Reviewed!
Переглядів 1,7 тис.Місяць тому
In the video we are going to do short reviews of several recently bought gadgets from AliExpress. Reviewed Products: Heated Solder Sucker: s.click.aliexpress.com/e/_mrP1C7D Plastic Mini-Vise: s.click.aliexpress.com/e/_m02OFgP Steel Min-Vise: s.click.aliexpress.com/e/_mssVfnV Soldering Iron Cartridge: s.click.aliexpress.com/e/_mNqmlL9 Spudgers: s.click.aliexpress.com/e/_m0MwMpz AliExpress Discou...
Uni-Byte 0232 - Let's Build A VARIABLE DC Load: (THINGS Go WRONG) Part 3 (Warning: PWM/fan noise)
Переглядів 1 тис.Місяць тому
New customers to PCBWay get a $5 discount: www.pcbway.com Note: There is PWM and fan noise in this video. Still getting the bugs out! In this multi-part series we are going to design and build a variable DC load. In part 3 here we will test the design goals and answer some viewer questions - but not all goes as planned. In Part 4 we'll hopefully finish up and put in a nice cabinet. Part 1: ua-c...
Uni-Byte 0231 - Mailbag #31: More GOODIES from AliExpress!
Переглядів 2,8 тис.Місяць тому
Yet more goodies from AliExpress. Mostly regulators, transistors. other parts and tools. Video Specific Links: Spudgers - s.click.aliexpress.com/e/_mOd96nm 78L12 & 79L05 Regulators- s.click.aliexpress.com/e/_mMgBKS4 2N506, 2N3819, 2N6517 - s.click.aliexpress.com/e/_m0Z6lwg Tap Drills - s.click.aliexpress.com/e/_mq969wo Radio Chips - s.click.aliexpress.com/e/_mNxjCWc Flush Cutters - s.click.alie...
Uni-Byte 0230 - FNIRSI HS 01 Soldering Iron REPAIR
Переглядів 7182 місяці тому
In this short video we attempt to repair a FNIRSI HS-01 soldering iron that accidentally got fried using a replacement part from AliExpress. Buying from Amazon or AliExpress? Use these links to help the channel and it won't cost you a penny more! Amazon Affiliate Link: amzn.to/49GmnRV AliExpress Affiliate Link: s.click.aliexpress.com/e/_DFiYIzD Help support the channel directly. Through PayPal:...
Uni-Byte 0229 - Very NICE Clamp Meters from TESMEN
Переглядів 6132 місяці тому
Uni-Byte 0229 - Very NICE Clamp Meters from TESMEN
Uni-Byte 0228 - Let's Build A VARIABLE DC Load: (It LIVES) Part 2
Переглядів 1,7 тис.2 місяці тому
Uni-Byte 0228 - Let's Build A VARIABLE DC Load: (It LIVES) Part 2
Uni-Byte 0227 - REALLY Nice Light Duty CORDLESS Iron from AliExpress!
Переглядів 1,7 тис.2 місяці тому
Uni-Byte 0227 - REALLY Nice Light Duty CORDLESS Iron from AliExpress!
Uni-Byte 0226 - FAKE Logitech M185 Mice? Really?
Переглядів 5972 місяці тому
Uni-Byte 0226 - FAKE Logitech M185 Mice? Really?
Uni-Byte 0225 - CHARGE Pumps - Are the "FAKES" Better?
Переглядів 8362 місяці тому
Uni-Byte 0225 - CHARGE Pumps - Are the "FAKES" Better?
Uni-Byte 0224 - Let's Build A VARIABLE DC Load: Part 1
Переглядів 2,9 тис.2 місяці тому
Uni-Byte 0224 - Let's Build A VARIABLE DC Load: Part 1
Uni-Byte 0223 - Mailbag #30: The MUST have Gadgets, Bits & Pieces for ELECTRONICS
Переглядів 1,9 тис.2 місяці тому
Uni-Byte 0223 - Mailbag #30: The MUST have Gadgets, Bits & Pieces for ELECTRONICS
Uni-Byte 0222 - Does the OWON XDM2041 Do The Business?
Переглядів 2 тис.3 місяці тому
Uni-Byte 0222 - Does the OWON XDM2041 Do The Business?
Uni-Byte 0221 - OWON XDM2041 55000 Count Bench DMM Review: Part 1
Переглядів 1,7 тис.3 місяці тому
Uni-Byte 0221 - OWON XDM2041 55000 Count Bench DMM Review: Part 1
Uni-Byte 0220 - SUPER Versatile and CONFIGURABLE Linear Power Supply: Part 2
Переглядів 8713 місяці тому
Uni-Byte 0220 - SUPER Versatile and CONFIGURABLE Linear Power Supply: Part 2
Uni-Byte 0219 - Quick FNIRSI HS-01 Teardown and Some Mail (NOT from AliExpress!)
Переглядів 1,2 тис.3 місяці тому
Uni-Byte 0219 - Quick FNIRSI HS-01 Teardown and Some Mail (NOT from AliExpress!)
Uni-Byte 0218 - Two quick EASY and VERY useful Projects
Переглядів 1 тис.3 місяці тому
Uni-Byte 0218 - Two quick EASY and VERY useful Projects
Uni-Byte 0217 - Versatile and Configurable DC LINEAR power supply - Part 1
Переглядів 7553 місяці тому
Uni-Byte 0217 - Versatile and Configurable DC LINEAR power supply - Part 1
Uni-Byte 216 - FNIRSI LCR-P1 Component Tester from AliExpress. Quick Review.
Переглядів 6 тис.3 місяці тому
Uni-Byte 216 - FNIRSI LCR-P1 Component Tester from AliExpress. Quick Review.
Uni-Byte 0215 - Mailbag #29: My biggest All ALIEXPRESS Haul To Date!?
Переглядів 1,7 тис.4 місяці тому
Uni-Byte 0215 - Mailbag #29: My biggest All ALIEXPRESS Haul To Date!?
Hi When I presa Shift and V (the V on ch2 key (the big one at the right bottom) the screen flickers and the signal trace color becomes green. Do you know whether this is an undocumented funcionality or a bug?
It's an undocumented feature. In case you don't like pink. You can do the same thing from the personalization menu.
Actually, just kidding. WE (the DSO2D13 users) don't really know what it's for. But in some cases it provides a sort of "heat map" like you would get on digital phosphor scopes. Play around with it and see what it does. Maybe you can be teh first to figure out it's purpose. But I do think it's an undocumented feature. Maybe at some future firmware release Zeeweii will tell us what it is. OR maybe it will go away as they can't get it working as they want it to,
Neat.
It is quite nice.
@@uni-byte Got a few of the next smaller one. Sometimes I place lower bets on them and end up with many of the same models. As for longevity measuring for 60 years the cheaper ones offer so much better value for money.
@@LawpickingLocksmith For most electronics uses, I'd have to agree.
Nice.
😊👍
It was probably just a sleeve for the Christmas card
Could very well be. Thanks!
Nice....cheers!
Thanks!
The 10A multimeter input is not protected by a fuse!!! POORLY!!!
..
The 10A multimeter input is not protected by a fuse!!! POORLY!!!
..
The sawtooth was lopsided because of the 40% duty cycle set on the screen.10:42. The measuring scope reports the same 40% duty cycle. Other waveforms subsequently sampled may also be affected by this setting.
Yes, of course. It was actually meant to be tongue-in-cheek. I had a long rambling explanation that did not make the final cut. The gist was, if we call a waveform "square" or "sawtooth" these have specific meanings in electrical engineering that don't allow for adjustment. Better choices for those modes would have been "rectangle" and "triangle" which are less specific and can be adjustable. Anyway, thanks for bringing it up. I'll pin your comment so others will get the explanation.
Sure the distortion isn’t an op-amp issue?
Yeah, it could possibly be. The thing that has me think it's a firmware or table problem is that it happens over a wide range of frequencies and amplitudes. So. although it could be op-amp related (I've seen some weird s#it come out of fake op-amps) I'm leaning toward one of the other faults.
@@uni-byte I was thinking it was an implementation issue. Either way, it will be interesting if they can improve the shape, although I assume the steps are here to stay.
I think it would be good to measure op voltage drift over time, and how much it varies with ambient temperature. My 30 year old diy linear psu with current limit using 2 x BC107, a BFY50 and a 2N3055 transistor (as in your design) does vary slightly with temperature . The voltage reference is 2 x 1N4148 diodes in series which is probably not ideal. The TL431 ? should make it very stable. So yes if your design has better temperature stability I'm in! Looking forward to the kit on AliExpress when finished!
The Zener I'm using is a 1N5231. They have a much better TC than the 1N4148 and can actually be close to 0. Worst case is somewhere between -1.5mV/°C and +1.5mV°C. But I won't rule out a TL431 as they are very inexpensive. I doubt there will be a kit available unless someone in China want's to copy my design🤣.
Completely assemble but when give supply no display come what to do please help
If everything checks out, It may be that the PIC16F628 has not been programmed. That seems to be a common problem reported. You can goggle "dl4yhf frequency counter". These are based on his design and he provides a link to the firmware. This might work with the firmware for counter2, but you could try all 3.
Even saying such "semi-sinusoidal" sounds softly 6 or 7 times is such super silly stuff that I sorta sighed and soon stopped.
Super!
You mean you can’t read Chinese?
LOL! I played hooky to go to a Chinese restaurant on the days they were teaching that at school.
He can barely read LOL! ...sorry bytey poos !!! happy new year ! I think again !
@@andymouse 🤣
Hi. Can you please do a video on how to check capacitors and how to tell if good or bad. Thank you.
I have a short series coming up, hopefully in a few weeks, you can get your answer from. Make sure you are subscribed to get ntoified.
Stick it over the corner of a page . It would make a good bookmark.
Great idea, thanks!
No ringing there. It powers up very cleanly. I think I'd turn the supply voltage both high and low, and set up the scope trigger just below that voltage, and with the supply voltage turned on just connect the rated load to the supply and observe the power supply's voltage transient. That's pretty much a worst case scenario for the supply. If it's relatively stable I'd call it good. BTW, I used to work at HP.
The issue becomes what kind of load? I tried that with some of those highly inductive vitreous enamel wire-wound resistors and got varying degrees of ringing (close to 1 Vpp worst case). I would suppose a 100% ohmic load would produce less, but they are hard to find. Were you there during the Bill and Dave heydays? Or during the horrible Carly years?
@@uni-byte, 1 volt of ringing for an inductive load seems reasonable to me for a hobbyist PS just as long as it stabilizes quickly. Inductive loads don't usually care if there are modest transients. I got out of HP before the witch, and everything went to Hell. I started out at HP Colo. Springs as a machine op, waiting for a tech job opening. I worked 2nd shift alone on the second level of a huge building, running CRT pump-down equipment, ovens and High Vacuum systems and cryo-pumps making CRT's for scopes. I worked right across the isle from the R&D cubicles. One night I saw a guy wandering through the R&D area in the semi-darkness, since it was after hours for the R&D group, and I noticed that he wasn't wearing a badge. So I went over, and told him that he couldn't be in the R&D area without a visitor's badge, and I escorted him through to facility to the front desk where the head security guard was stationed in order to get him a visitors badge. While we walked we had a nice chat about test equipment manufacture since it was a very large facility and took a while to walk through, and I wasn't a security guard, and the guy seemed pleasant enough. When we got down to the front desk the security guard leaped up and said, "Is there a problem Mr. Hewlett?" And Mr. Hewlett replied, "None at all. This young man pointed out to me that I needed a security badge in order to be in the R&D area, and since I wasn't issued one when I came in he escorted me back here to get me one. I'm pleased to see that all of the employees here are aware of industrial espionage and take security seriously. He should be commended for his diligence." As for me, this was in the days of information starvation before the Internet and digital photography, and I was a 22 yo kid who had no idea what Bill Hewlett looked like. Perhaps there was a picture of him on the wall in some board room I wasn't allowed into, and he hadn't started yelling about who he was or gotten huffy with me for interrupting his wander through his own R&D department. We both pleasantly did the right thing. So I went back to work, having kept my job, and gotten an attaboy from Bill Hewlett.
@@johnwest7993 Great story! Thanks for sharing.
Osobiście waham się pomiędzy DSO3D12, a ZOYI ZT-703S - które urządzenie Pana zdaniem jest lepsze ?
It depends on what you need. The scope in the DSO3D12 is superior, but the DMM in ZT-703S is better. The generators are different. The Zeeweii will work up to 5MHz, but the Zoyi has variable amplitude. Also, you can view the DMM and scope at the same time on the Zeeweii and it's screen is a bit bigger. For me personally, the Zeeweii is the better choice.
Nothing wrong with using a TL431. Might be slightly better tempco, and has nice two resistor/potentiometer setup to setup whatever reference voltage you want it to output. Surprised you didn't check to see what the turn-off waveform looked like, and the waveform when it gets a step-response load added and removed.
I'll consider the TL431. I'll do those tests later on when I have it being supplied with a transformer. I expecting the turn off won't be as pretty since the main power will likely fail before the op-amp power. I need to do some more thinking on what to do about that. Maybe use an MCU to control turn on and turn off, but I don't want to get too complicated with it.
I'm looking at the manual for this meter, cause this would be a really nice addition to my bench. I do mostly repair of audio equipment, so I'm focused on the capacitance, especially in the uF ranges. On page 18 of the manual, it gives the equation to determine accuracy, based on actual measurement, test frequency, etc. The equation given is: .1% (1+Cx/Cmax + Cmin/Cx) (1+Dx) (1+Ks+Kv+Kf). Its the Cx/Cmax that throws me off here (most of the other bits basically fall out of relevance compared to this one, so ignore them for our purposes here) Cx/Cmax is in the case of a hypothetical 10,000uf cap (the rated upper limit). Cmax per the chart below that is given as 15.9 @ 100Hz so we get 10,000/15.9 = 629. Multiply that times the .1% basic accuracy and we're at 62.9% error??? Am I doing that right? That accuracy (or total lack thereof) even at the top of the range is nuts, so I must be screwing something up??? Thanks again!
I'm not sure where you are getting the value 15.9 from. In my copy of the manual (ET44 Series) Cmax for 100Hz is 800. And the basic accuracy for the ET4410 is 0.2% not 0.1%. That said, there is a chart on page 19 that gives the expected accuracy. According to that chart, for 10,000uF (10mF) @ 100Hz, the accuracy is 2%.
Reusable hot tea cup. Microwave and dishwasher safe.
Warning: Do not read the above comment if you are now or will ever be allergic to sarcasm.
LOL! 🤣🤣🤣
@@mikebond6328 Happy New Year Mike!
Happy New Year. The design is looking pretty awesome so far.
Thanks, and happy New Year to you too.
I like your panel design idea. PCBs have gotten so much cheaper over the years! At a past job when I was doing this regularly, I used FrontPanelExpress. They have a nice CAD program that lets you design a panel and see what it will cost. They do infill in different colors, and they also let you tap threads and so on. Very professional looking. Nowadays, I am not as certain how I would do it. 3D printing is affordable, so instead of tapping a thread on the reverse side I might make a bracket to hold an LCD display and glue it to the inside. Or even 3D print the entire panel.
Thanks you, and thanks for the information.
It's a hat ! Happy new year ! Its the 1st today ! I think the Matte green is awesome I think it costs a little more but could be wrong. This looks great so far ! very nice noise and switches one like a goodun !!
Thanks Andy, Happy New Year!
Very informative video Thank Sir
Thanks Abdul, have a great 2025!
can the oscilloscope be used while plugged in?
Yes, the scope and the generator will work fine plugged, but the DMM cannot as it communicates over the same serial port as the USB.
Interesting power supply project. I like it. I would be interested in the power stage circuitry consisting of the three transistors. Could you please explain it more deeply for better understanding? Especially I did not understood the purpose of the "light" feedback for the first transistor following the Opamp (4:47).
Did I say light? I thought I said "a little" negative feedback. The negative feedback is there for the same reason negative feedback is always used, to reduce the voltage gain. Just the emitter resistor alone would provide some, but that would only be with respect to the base drive. Putting in the 3K6 resistor to the output provides more negative feedback in response to the output voltage. Since the op-amp is capable of 10V or so on it's output we only need a little voltage gain to accomplish our task. Too much will make the circuit unstable, so we reduce it.
Yes, you are right, you said little feedback. Sorry for any confusion. I have simulated with LtSpice. Your technique is new for me. Personally, I would do it with resistive divider at base only. However your approach is clever. I‘m aware with negative feedback but have never used such technique. Thanks for explaining and Happy new year!
@@heinzkreutziger2218 You are welcome. No worries, I wasn't upset at all. I should be publishing the test of the circuit tomorrow. Happy New Year!
nice true English
Thanks!
DS03D12 posiada True RMS, kiedy działa jako multimetr ?
Yes, it is true RMS.
Can the device measure 2 reverse-phase waves on 2 channels?
Yes. The two channels are completely independent and will display whatever signal is present.
@@uni-byte can you make a video to measure 2 reverse-phase signals on 2 channels? I really need it
@@huypixeltft6068 What do mean by reverse phase? Are you talking about reverse polarity? What is this for, audio, stepper motor control, 3-phase motor control?
@@uni-byte I want to create 2 reverse phase waves to connect to the 2 input signal of the differential amplifier
@@huypixeltft6068 Yes, it can do that. Any 2-channel oscilloscope can do that. I have a busy schedule and would not be able to get a video showing that in the near future, but you can take my word for it.
DS03D12 posiada True RMS ?
Yes, it is true RMS.
The "eevblog" meterts always make me laugh. I just could never buy one. Not from Dave - he thinks 911 was an "inside job". Weird. I'll keep my Fluke 87-5.
LOL! I wanted a Brymen and I only bought it because I like blue better than red. Agreed, Dave is more than a bit of a right-wing conspiracy theorist guy. Sometimes it quite entertaining.
Cool! I love my Fnirsi internal resistance tester. Some of their products are a bit over cramped. Their DSO-TC2 is great but not that user friendly.
I have a bunch of FNIRSI stuff right now. Most of it is really good. I think they are getting better overall and listening to their market. I use their HS-01 irons exclusively these days. They just work so well.
@@uni-byte Agree, if they continue they are showing others how to compete. Love my HRM-10. Would less recommend the DSO-TC2 or their benchtop scope. Guess next gen will be fine?
They keep pushing out crap into the market.
I wouldn't call it crap. Not everyone can afford $1000 for a scope, DMM and FG (and that's already on the cheap side). Tools like this help get someone with less than $100 into the game.
Dave, is that you 😊
Just putting the Kelvin clips in the holes does not give you 4-wire mode. Plug some 4mm connectors in and clip the leads on. You need to get the feed and sense parts of the Kelvin clip apart.
It does not introduce as much error as you might to think. Your idea to put banana plugs in would create about the same error of about 2 cm of un-corrected wire length. The measurement node is where the kelvin clips make contact. Whether or not that contact is across the component leads, or the component leads meet that point in another way is immaterial. The only error will be the unaccounted for conductor from that node to the internal element of the component. The way I did it, they measurement node is where the clips first contact each other which might a cm or 2 from the contact point to the banana socket. Virtually the same would be true if banana plugs were inserted.
@@uni-byte The problem with simply dropping the probes in the hole is that you have no idea how good the contact is. And the sense wires are now on the wrong side of that uncertain contact so they have no way of correcting for it. Plugging in a 4mm connector (no insulating cap) allows you to make contact close to the hole, but now with the sense wires doing their proper task.
@@donepearce Ahh, I get what you mean and generally I'd agree. However, in this case the kelvin clips have sharp gold plated edges that when put into a banana socket make very good contact.
@@uni-byte I feel an experiment coming.
@@donepearce Kind of did that in the video when I compared teh result with the REL mode. No?
Nice unit, very similar to the ZOYI ZT-703S which I have and I know so do you. I think you may get some better results if you had taken the time to null out the test leads. On the Zoyi you briefly press the power button I would guess that there is a similar button on the FNIRSI . Like yourself I started with a second hand Heathkit. They did the job at the time. I agree that these little units are a fantastic tool for the new user, and also for those of us that are somewhat longer in the tooth.I bought the ZOYI for pretty much the reason you gave and that was working on MCU projects when away from my main workbench. However one other benefit that I bought the unit for was that it is completely isolated so you can do a bit of poking around on some older equipment without the danger of frying the front end of your scope via some earth return issue. Looking forward the the PSU project. Thanks for some very interesting videos, hope you had a Great Christmas, and all the best for the new year. Andy
Actually, I don't have the Zoyi. I have a Zeeweii DSO3D12 though. The manual for the Fnirsi is lacking quite a bit. I'll look around for a REL button as you suggest. Thanks for suggesting it.
@@uni-byte sorry, must be another channel - these things get everywhere...the Zeeweii DSO3D12 is another example of a nice starter instrument as well.
@@andye2005 Indeed it is.
I work with robotics and building cells for the auto companies. In the drawing packages we receive are blank pages. The intention of blank pages are for notes. Designers, controllers, mechanical, electrical and supervisory notes can be noted on the blank pages for reference and reminders. In R/D, design changes are a constant. So having these blank pages really comes in handy in times of design or layout flaws or changes. Most, if not all these blank pages have page numbers also, so when referring to a specific change, you can refer to the page number in meetings are update calls. I find them to be very handy and efficient.
Absolutely. Been there, seen that and used 'em many times. But in this case, the page has writing on it telling us it's got no writing on it. That's what I was hinting at. Thanks for taking the time to watch and comment. Much appreciated.
This video could have been 2 mins long instead of 14, all his saying is check polarity of supplied power cable and make sure center pin is positive
Well, no. More information is given than that.
Is it possible to build an oscillator circuit, drive it into the ground through two electrodes, and emit electromagnetic waves at desired frequencies?
I'd use an antenna of some sort rather than drive it into ground, but that's basically how a transmitter works.
It shouldn't matter how much something cost, charge your standard rate and don't take advantage of people.
Agreed.
I miss the possibility of control by serial port commands. All modern devices MUST have this.
I won't say I disagree, but good luck finding a 3-in-1 meter like this for under $100 that has that capability.
From your video, it looks like an interesting device to me as well. In particular, I would like to know more how this device performs in "hands on" event of any repairs/troubleshooting a circuit. For example in the repair of radios, audio amplifiers... where you need to input a small signal and you check the amplifier output signal (shape, clipping point, max RMS power measurement @4/8ohm load). Perhaps as a suggestion, would it be possible to include an example of this within the review of this product? Example simple audio amplifier kit idk... TDA7265 +-12V with a volume potentiometer and 4/8ohm load resistor. This would show if its easy to use and whether it is practical in this specific case... I look forward to further reviews
There is an interesting kit I want to build up. It's not an amplifier, but it is a simple signal generator. I could use the FNIRSI to analyze it, but I'm not sure when it will get done. So much to do over the next little while.
@@uni-byte of course priorities first especially now during the holidays. And yea it could be a good example on "hands on" device performance. It maybe would be interesting in addition to analysing DIY kit with FNIRSI maybe to take a look at the shape of the singal from DIY kit and the shape of the FNIRSI 2C53T signal generator on the bench oscilloscope and see which is better... Thank you, and I wish you a Happy Holidays.
@@SQERS3 Happy Holidays!
Wishing you a Very Happy Christmas and Best Wishes for the New Year from Maynooth in Ireland.
Thank you very much! Same to you. I was born in Bray just 45 km from Maynooth.
I have been looking for a device like this to keep with me away from my bench at home. Thank your for reviewing this. Not sure what I will end up getting, but this one looks pretty decent. Again, thank you!
You're welcome! Also look at my 3-part review of the Zeeweii DSO3D12.
Your affiliate link is broken. Have you another link for this?
That's a thing. Seller's stop selling things for whatever reason.. Try searching on AliExpress for "CH224K Module". There seems to be a module available these days that has the config pins directly broken out.
Nice enough device, I draw the line at instrument, thats reserved for my Tektronix and HP gear...YAYYYY!!!!! I'm a test gear snob !!!!
I agree to a point, but it's all relative. This is a fine instrument to the guy that has a logic probe, a $5 analog meter and only $100 in his pocket. :-) I do really like the older Tek and HP stuff. Back before the Agilent/Keysight days. Not such a fan these days when I can get something from Siglent that will run circles around anything I can get form Keysight or Tek for the same money.
@@uni-byte :)
Excellent work. I really love Fnirsi products. Own several of their products already. Waiting to see if I should get this since I already own a ZEEWEII DSO3D12.
This has some features the Zeeweii does not have and vice-versa. I may do a comparison video some day, but I'd say you are in good hands with the Zeeweii. I have one of those as well. Did you see the review I did on teh Zeeweii?
@@uni-byte Yup, that is why I ended up buying it. You probably have the most thorough review of it on the internet.
@@TRONMAGNUM2099 Cool! Thanks.
Great review. What level of technical skill would you recommend this device for? Is it good for someone to use early and then be able to use this device for more different tasks as more experienced the person become?
Yes, this would be a good for a beginner and would certainly be useful to an expert too. Especially for off-site work where portability is important.
Not sure if you've already solved the mystery of the melted battery wires, but my suspicion is that the Red / Black leads **might** have been reversed in polarity. This would cause a short circuit through the body diode of your MOSFETs and draw significant current. The melting solder most likely saved your board! :D Edit: Yep, you figured it out... 👍
Watch part 4. 👍 Hint - The leads were not reversed.
@@uni-byte Just finished part 4. Nice catch!
@@Pyroteknikid Thanks. I was invested in the outcome. LOL!
Nice! I always forget about giving that a try!
You should try it.