0060 - FG 100 DDS Function Generator: NO! JUST NO!

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Review of this little function generator. However, from the first moment we turn it on it starts out bad and just keeps getting worse. Hang in for the duration to seem some of the worst technical fails ever.
To their credit, the vendor immediately returned all my money, but Just can't help thinking they know what they are selling.
#fg-100 #electronics #functiongenerator #dds
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Опубликовано:

10 июн 2023

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Комментарии : 57

@sorcererstan 11 месяцев назад

I just re-checked mine that I got several years ago and it's actually very nice waveforms all around, up to the max specs. Must have gotten lucky.

@uni-byte 11 месяцев назад

You may have gotten your before the attack of the clones!

@muppetpaster 7 месяцев назад

Same here...ordered one 2 weeks ago after seeing this, just to have a laugh...Have to say I'm powering it with 12 Volts..... And hey...What'd you expect of this, being just south of 10 dollars...I actually paid 7 Euro's.

@shaunmorrissey7313 5 месяцев назад

I have one of these and I have to say mine behaves completely differently, I opened mine up and the construction is quite a bit deferent and the op-amps used are TL082C. Seems I have been lucky with my purchase.

@uni-byte 5 месяцев назад

Nice! Do you remember the vendor you got it from?

@shaunmorrissey7313 5 месяцев назад

@@uni-byte Hi, looking back I bought mine on the 6th of October 2021 from an ebay seller base in the UK. I didn't think I had it that long.

@trcwm 11 месяцев назад

Great video! anxiously awaiting the follow-up.

@aquinamedia4508 11 месяцев назад

Many thanks for the educational and buyer beware content! Could be an interesting follow-up video on swapping the op-amps.

@uni-byte 11 месяцев назад

Yes, it will be revealing for sure.

@davidv1289 11 месяцев назад

Thank you for sharing - sorry, but I have to admit I had a good laugh at the waveforms - glad to hear you got your money back. Replacing the opamps would be interesting and the "clip and clean" method would probably be best in this situation - less chance of board damage. Regards, David

@uni-byte 11 месяцев назад

You and me both! Yup, the "clip and clean" method looks best to me too.

@mrv4757 3 месяца назад

Well, the review seems to be missing a suggestion on a good generator within the same price range. The video is interesting anyway, so thanks for sharing.

@uni-byte 3 месяца назад

Problem is, there is nothing else in the price range. If you get one of these that works properly, or you have the skills to get it working (see the follow up video #0071) it's pretty good for the money. The next level up and your into the $75 range. But you do get a lot more in that range.

@ovalwingnut 8 месяцев назад

GR8T Infotainment. Thank you.

@uni-byte 8 месяцев назад

Glad you liked it!

@user-ni2cc2pm5c 7 месяцев назад

Thanks for your video, the one i've bought doesn't even generate waves only bulbs coming out 😂

@uni-byte 7 месяцев назад

Sorry to hear that. If you can check the output of the DAC to see if it's okay then maybe an op-amp replacement might get it going.

@georgehanekom5412 11 месяцев назад

I don't think I need a AWG for what I do just yet and I do have the little XR2206 kit in case I need to make a speaker beep. The local online retailer had this one for sale with one review that was terrible so I was really looking forward to your input. Also looking forward to see if changing the opamp works, I had a clone DSO150 oscilloscope go magic smoke on me and after ordering new ICL7660 (I think) IC's I managed to get it working fairly ok after that.

@uni-byte 11 месяцев назад

The little XR2206, despite having issues of it's own, is head and shoulders better than this. I think I'm going to use NE5532 replacements. Others seem to have had luck with them. Good going on the DSO150!

@markharrisllb 11 месяцев назад

I bought one of these when I first had my Hantek 6022BL. Even though I was extremely new at the time I realised it wasn’t helping my progression. Sadly I think the market will be mainly the very naive like myself and it does negatively impact on our experience and journey into learning electronics. Even sadder is that there are several RU-vid videos praising them at the price.

@uni-byte 11 месяцев назад

Yeah, things like this can be a real drawback to someone just getting their feet wet. Like buying a budding musician a $300 trombone. More likely to make them hate playing rather than excel at it.

@ivolol 11 месяцев назад

I saw a russian? video of a guy who had ordered a DIY 0-30V PSU board. Whole board worked fine [eventually], except... they had included dud opamps in the kit. So many problems on first start. And when he substituted some others he had on hand... also dud 'cus they'd be ordered from ali. He eventually made his own 'opamp tester' circuit (verify very basic comparator functionality) to find a portion of working ones out of what he had on hand, and finally the whole kit worked perfectly.

@uni-byte 11 месяцев назад

The whole counterfeit chip thing seems to be getting out of control. For me, I tend to buy more for reputable outlets like DigiKey more these days. I do have some eBayer's I've used for years that have yet to pass me a counterfeit chip, but they usually don't have everything I need.

@user-lb2kr7wt3g 4 месяца назад

It strange on your oscillo Mine wark very good!

@uni-byte 4 месяца назад

Yeah, it looks like some are good, others not so much. Watch the follow up video. We fix the problem.

@alasdair4161 3 месяца назад

I made the mistake of building the kit version of the FG-085, and it is even worse. The FW has more bugs than a beehive.

@uni-byte 3 месяца назад

I wasn't even aware of that model. Is it just the FW?

@jcbu55 5 месяцев назад

Can the device be used as a sound generator? Thanks for the reply.

@uni-byte 5 месяцев назад

If you get a working one it will generate audio frequencies.

@jcbu55 4 месяца назад

@@uni-byte I got mine now and it works great. 👍

@uni-byte 4 месяца назад

@@jcbu55 Good to hear!

@tomigalik4052 9 месяцев назад

How many max amper can it produce in output?

@uni-byte 9 месяцев назад

The original op amps are capable of about 10-15 mA. The ones I put in can do maybe twice that. So, not much. It really is a high impedance output and NOT a 50 ohm output like hey suggest in the information sheet.

@muppetpaster 7 месяцев назад

Sure.....Amps output....😂😂😂 Funny man...

@stargazer30721 11 месяцев назад

We bought one of these at work because it was inexpensive and if was damaged in the field it would be ok. Had all of the same issues our tech says. Buyer beware!

@uni-byte 11 месяцев назад

Thanks for the additional info. It does seem the majority of them these days are tiny boat anchors.

@paulhall9713 Месяц назад

At about 15:00 I nearly choked to death.

@uni-byte Месяц назад

LOL! Thanks!

@icollided 4 месяца назад

Thank you for saving me $25

@uni-byte 4 месяца назад

You are welcome!

@jeanyluisa8483 29 дней назад

Those cheap function generators are sold by countless resellers. Even though they all look the same, they have different firmware versions and and some different hardware components. Thats why the many tests of this generator on RU-vid show so different results. I bought one of them about 3 years ago and its as lousy as the one in this video. I bought another one 2 month ago. That one works fine, the sigals it generates are ok and it even has some more waveforms than the old one.

@uni-byte 29 дней назад

This one was repairable. See the link in the description "We fix the FG 100 DDS".👍

@jeanyluisa8483 29 дней назад

@@uni-byte Oh yes, now when you point me o that video - I have seen that video some time ago and ordered some N5532 to fix it. Problem is just, that I have no experience with soldering those tiny smd parts. My soldering skills are already bad enough at bigger parts. So fixing it is one of many projects for "later", when I am in the mood to try it. As I wrote I already have a new one of those FG 100 DDS and it works fine.

@uni-byte 29 дней назад

@@jeanyluisa8483 Sounds good!

@johnwest7993 9 месяцев назад

In my professional opinion, 'All broke ting'.

@uni-byte 9 месяцев назад

Indeed it was!

@oldskeptic1513 8 месяцев назад

... once upon a time there was an expression, you only get what you pay for ... I do not think I'm the first to say, you've got a faulty unit as well ...

@uni-byte 8 месяцев назад

I ended up fixing it and it turns out to be quite nice. See this video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-XWJOChu1ZMc.html

@oldskeptic1513 7 месяцев назад

@@uni-byte ... thanks, I shall ...

@SquareWaveHeaven 11 месяцев назад

More like.... DYSfunction Generator : >

@uni-byte 11 месяцев назад

LOL! Just about sums it up.

@dishepullisais2434 9 месяцев назад

05:00

@TRONMAGNUM2099 9 месяцев назад

I was dying laughing watching this. Pure garbage there. You could do just as good maybe better with a 555 and a breadboard.

@uni-byte 9 месяцев назад

A 555 would be a dream in comparison to this in it's original state. After replacing the op-amps with real ones it turns out to be quite good: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-XWJOChu1ZMc.html

@kd5ozy 4 месяца назад

what do you expect from chinese junk? spend a little money and get a good one

@uni-byte 4 месяца назад

Thanks for your comment. The point of getting this was for review as a part of the beginner's electronics tool kit I am developing. It may come as a surprise to some people, but there are some beginners that do not have the money to spend on a $600 function generator, or at least do not want to spend that kind of money (+$600 for a scope, +600 for a power supply, +++$$$) on a hobby they may abandon for one reason or another. That's they idea behind the beginner's tool kit. To put together a set of useful instruments and tools at a reasonable cost. These were once pretty good little generators, but doing this review we found out that that the market is being supplied with counterfeit components.