#146 

I totally understand about the display Andreas, I love those blue fluorescent displays. I have an ancient second hand Fluke bench meter with a VFD and I love it.

Love your videos! Definitely underrated. Keep it up!!

I purchased a Maynuo M9712 300W load some time ago, it looks like a copy of the BK precision unit you showed, only price is closer to the one you purchased. AND you cover it later in the video... good stuff.

Excellent video Andreas, you've convinced me, I need to invest and get myself a proper electronic load, it will save me the trouble of messing with the cheap ones. I was looking at these two for quite some time (Maynuo and Itech). Also having the multimeter grade display, saves you from using an additional two instruments..

at 5:55 it should be a voltmeter across the shunt resistor, it measures the current flowing across a known resistance using ohm's law by measuring the voltage across the known value of the shunt resistor

Good day Andreas and congrats on your new equipment! Nice video again; great explanations to help many makers understand better. Great work! (Btw. you probably already know, but if you have multiple of those cheap 1A/2A Usb load-resistors, they can quite easily be converted to 1A/0.5A. See the video on my channel, which also refers to your comparison)

Hi Andreas, good to see you again. :)

Yeah I bought such a power module dps3005 and a metal casing (all components were included but I connected the switch on the back differently to turn the fan on for high loads or off when on very small load) It's very handy and cheap for a lab power supply for a hobbyist! I run it from a laptop power brick which supplies around 19V only but can deliver several amps, and that's enough for most electronics that only require up to 12V.

I just received my Maynuo M9712 DC Load about a month ago, its "exactly" the same as your unit for about US$440 from AliExpress. I can send the supplier link if anyone wants one from there, as I the first supplier replied "there were not any left in China"... well I got one from another supplier and fast! I also managed to get my hands on the isolated USB adaptor for US$40... wish I had access to your video before that purchase to make one myself... although the one I got works fine. I think there are a few of these units under different brand names, I have not seen any bad reviews of the different variants. I am very glad to have it in my lab... already used it a few times and couldn't have done without it.... the PC connection/software is great.

Thanks a lot, very interesting!

Thank you for your share. As a Chinese, I am very happy to see this.

Good summary of Ohms Law.

Again a very good video ! Also interesting is the efficiency of power supplys, certainly if you gonna do a video about solarpower. What is the inputcurrent with no load and with variable load.

Like i learned, many Year's ago: a German Phrase "wer misst, misst Mist!". And you show it everytime, how this is true.....

Great video. I like the analysis. The electronic load is a little pricey though. Maybe in the future you will find a cheaper load like the power supply and review. Your work inspires me to put out some videos too. So far I have not but I think I will soon.

Nice vid old man !

Morning Andreas. So I see you are tempting me to buy some serious electronic equipment 😀 Once again a subject that I had no proper understanding, but now hmmmm. Might have to be on my Xmas list. Great presentation as always👍 thank you my friend The additional information at SensorsIOT is very clearly laid out👍 Can I put in a request? I love the way you present the information graphically. Would you be able to do a video to show us how you go about making such images and graphs. ✌️

Thank you for yet another informative video! I got interested in the DPS5005, so I checked the specs. It seems it's a voltage step-down device that takes up to 55 V and steps it down 50 V max. I guess you have another power supply feeding the DPS5005 around 40V DC, which in turn is connected to mains power 230 AC(?) So this spawns 2 questions: What power supply was that supplying the DPS5005, and what were you testing in this setup then? I think you were testing a power supply and a voltage step-down in conjunction. Ie, in this setup, can we always be certain that the last device in the chain (here the DPS) is at fault if we get "crappy" results? Sorry if this question is somewhat basic and badly formulated, I hope it's understandable :-)

Another useful video but power supplies need to be tested for noise, transient response etc. if they are going to be used on a serious electronics bench. Some shots of your lovely scope and the new load switching between currents would have been nice.

I have that Maynuo load you mentioned. Specs are good but the manual is completely useless. The cryptic 14-segment VFD is pretty confusing without documentation.

Hello Andreas, first thank for all your knowledge sharing. I wish also to get a DC Load, I just want know if now do you have a updated verdict about the It8512A+? My second choice is the M9811, both are more or less at same price. The largest display on Itech seems also great for me, but still the software seem better on the Maynuo. After few months of usage do you think is still a good choice or you recommends another device in place ? Thanks again for your channel

I wonder if the "new version" of the DPS5005 is the one with included Bluetooth connection? I guess we will find out in a couple weeks.

Hello Sir Andreas this video is very useful and one thing what video should i start from? I'm a fresh graduate of bs. computer engineer and started working in Test engineering :) and still I need to learn more. THANKS!

excuse me, if I have a motor hub kit for my bike with a controller of 72v 5,000watts, and if I am building up a battery pack of 72v and 5,000watts, plus the load of the controller. will it come to 70v or less when i connect the load_?

Andreas in ohms law V=I/R V = voltage. Great Video again mate. Alway loved 4 wire measurements. Used it a lot in calibration. 4 wire was the best way to check impedance of parts in a circuit.

Is it necessary to buy electronic load for beginner. Thank you

hallo Andreas, I would like to buy a DPS5005-C with the function to connect it to the computer. can you say what could come in connection with the producer?

Andreas, all in all, was the Itech Electronic Load a good investment? Thanks.

Gloves?

If those test leads are the inexpensive stock ones there's no way they're 14AWG. They have extra thick insulation to handle high voltages. I've seen some of them as low as 26AWG. The only way you can confirm that a test lead is 20AWG is to make it yourself.

Thank you.

There is an alternative firmware for the dps5005 available: johan.kanflo.com/hacking-the-dps5005/

Those RDTech power supplies are great, I have 7 of them, including the new remote control version which is handy when used with at PC. RDtech's stuffs official store is rdtech.aliexpress.com if someone wants a direct link. RDTech's software is much better than those shown for your load. I'm guessing that is the version he is sending you. It is handy with Bluetooth or USB connection. The seller is a great guy too, very helpful and always easy to get ahold of. Shipping time is super fast as well and well protected as mine has come in a big styrofoam box with bubble wrap inside. I also have 4 of those electronic loads and they are great. The main reason to prefer them over others is the fan control! Thankfully someone was smart enough to have the fan be more than just ON/OFF like with ZKE Tech products and that initial smaller load you had shown. The one you showed by ZIHYU the zpb30a1 (i have v2.7) actually bases the fan speed on the temperature so it only spins as fast as is needed depending on your load value. Just make sure you get the model with the newer fan, it is much quieter than the original As with many fanned devices, adding a bit of space between the fan and heatsink and sealing the outside gap now created, can reduce noise even further without impacting your airflow negatively Speaking of on/off fan controls, if you get one of the RD Tech housings, don't wire the fan as suggested. Modify the circuit by using a transistor (or just connect directly) connected to the fan on the power board (the non all in one units, or ones with a fan, the better price/performance models) so the added external fan turns on only when the internal one does. Little less noise in the lab that way.

Too many advertisements.