YEAPOOK ADS1014D 2 in 1 Digital Oscilloscope DDS Signal

This does exactly was was promised. I’ve worked with standard old school oscilloscopes for more than 40 years and this beats them completely.

I bought this as a space saving way to have a scope on a small bench to work on old 8 bit computers. It is ideally suited to this and the compact size make it much more convenient than some of my other scopes. The scope is easy to use and has a lot of nice features for the money. You can’t go wrong with this compact, lightweight and functional scope

I was tempted to buy an oscilloscope costing twice as much, but there was no need this does everything I need.

Initial measurement displays were showing voltage spikes that seemed to be from the switch mode power supply that cleared when using a power bank. After using this oscilloscope for some time, the problem when using the SMPS seems to have resolved itself and is ok now.

I have given this a five-star review because I am more pleased with it than I expected to be.

To have a quick look at what it could do I plugged it in straight out of the box (using a wall-socket USB which can supply 2.1A at 5V). I then pressed the green signal-generator button and set up a 500Hz square wave (using the various navigation arrows plus OK). I then hooked one of the probes to the signal output (using the supplied signal output lead), pressed the auto button and there was the square wave on the screen. I then just played around with it to familiarise myself with the controls. You can always just unplug the leads and factory reset the whole thing via the menu button.

My main worry was that some previous reviews have mentioned various bugs that needed fixing by updating the firmware for the FNIRSI 1014D (which is what this device clearly is). However, when I looked for those bugs, they didn’t seem to be present. For example, a review on the famous video site said that you couldn’t switch between AC and DC coupling on one of the channels without the update– you can on mine. I assume that the ‘scope I have was shipped (February 2022) with the latest firmware updates, which is why I am more pleased than I expected.

In the box you get exactly the same manual that you can download from FNIRSI (with just the name changed). Whoever wrote the manual probably does not have English as their first language, but, having said that, it’s not bad — they obviously know what they are talking about. Just heed the ‘Serious Warning’ so that you don’t destroy your ‘scope. Other than that, everything becomes clear when you experiment with the machine. The manual is certainly not exhaustive. You will have to figure out all sorts of things by common sense and experiment (for example, the voltage values on the horizontal cursers give the voltage difference between the cursers, and so on). There is also a leaflet with the probes (and a bag of bits including screwdriver) that explains how to compensate the probes. I did that and it works easily.

If you are new to oscilloscopes, like me, I would recommend a read of something like ‘XYZs of Oscilloscopes ‘, free to download from Tektronix and/or have a look at some videos. Pricewise, apparently it’s a bargain compared to other ‘scopes. For me, for occasional hobby use, it’s a bit of chunk of money. On the other hand, it does cost less than two tanks of fuel.

I am used to using older analogue scopes but happy with the functions this adds. Manual is tiny so download the online version from FNIRSI who seem to make this scope. I noticed the dc voltage reading was wrong on mine so applied the version 3 update available on the web which seems to have cured the problem. Unable as yet to work out how to do a Ch A – Ch B measurement (useful for differential amplifier inputs) and yet to use the generator function.

L’ho preso per un uso amatoriale per cui non pretendo una precisione eccelsa e al momento attuale rispecchia le mie aspettative.

This oscilloscope was a little tricky out of the box. Firstly, the included power supply was of the 2 prong variety, but this was expected as mentioned and photographed. The manual prohibits using other power supplies, but I found no issue with a high-quality mobile phone charger.

I also ran into (and overcome) two further issues out of the box. Firstly, I was unable to get the trigger function to work reliably, but this was resolved by updating to the latest ‘FNIRSI’ firmware (this is a rebadged FNIRSI 1014d). The second trouble I had was that channel 1 was reading far too low on the 1V scale, this was caused by a sticky relay, and rapidly switching the voltage div knob fixed that. (See photo for the wave)

It is great that this oscilloscope can operate from an isolated 5v supply, it makes measurements of signals that reference a non-earth potential possible, though a little dangerous. The integrated function generator is nice to have, it would be even better if it had a level control for it, as it is a 5V signal.

The signal generator doesn’t have an amplitude control.

Good simple digital scope for the price.

Nice for the price. Custom waveform gen is interesting, albiet a bit tedious to get your desired waveform.
Some buttons are behind menu buttons.
but overall very nice, it uses 5v power from a wall wort, meaning that it isnt referenced to mains ground like some scopes. So you dont need a differential probe. Which run $200.

Connecting it to a pc just lets you look at pictures, thats it. But if you take the scope apart, there is a 8 gig SD card with those waveform pictures,it can be removed to transfer photos. But you gotta take it apart, dunno why they didnt put the sd card on a side where you can easily remove it.

but For $200, it is well worth the cost, gives you a 2 channel and a function gen. Other scopes that have this are twice the price.

This is a very good unit for the price easy to use its similar to the Chinese made american brand scope I use at work the auto button makes it easy to use has a large clear display and useful function generator comes with probes and instruction book only bad thing is the supplied mains usb adaptor has non standard chinese pins so I use a spare usb adaptor very good for general hobby use promo delivery from amazo

Feature Rich digital oscilloscope, built in sig. gen. very useful. A very good general purpose and more, scope, for a truly amazing price

I’m still dubious about support: I’m pretty sure this is a re-badged FNIRSI model, but I can find no web-presence for Yeapook (downloadable user guides/firmware updates if needed). At the price I think it’s hard to beat. Annoyingly, it came with a Chinese power adapter (easily fixed – it needs a typical, isolated, 2A+ USB supply). After reading a number of reviews (mostly FNIRSI) I gave it a quick checkout. It’s not the most accurate – less so as you get towards 100MHz (but a 100MHz scope only reproduces sinusoid fundamentals near the limit, so you can’t expect it to recreate a 100MHz square wave). I was also worried about reports of wildly inaccurate measurements, but so far it looks quite good (just make sure the probe info is set up properly, and that you aren’t using too slow a timebase and actually looking at an ‘aliased’ signal reconstruction). I do find CH1 seems to have a little inbuilt overshoot (after adjusting the probe). For the price I have an extremely good, hobbyists diagnostic tool with a useful signal generator (& – unless I can find a way to extract/analyse the data – pretty pointless FFT analysis)