Instrument Basics: Electronic Loads - Workbench Wednesdays
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- Опубліковано 2 чер 2024
- An Electronic load can sink current from power sources such as power supplies or batteries. Loads are useful to test a power supply’s design margin or verify a battery’s capacity. See how three different instrument options from ultra low-end to midrange to high-end compare. Learn how modes like constant current and constant resistance can be used for different measurements: bit.ly/2lU0Gvt
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: bit.ly/2MFMG0v
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Really useful and excellently presented vid. I've been struggling with understanding how, why and when to use an electronic load, so, other than a 100W wire wound resistor, I've not purchased anything yet. Now I feel that I can start to think seriously about one. Many thanks
Great video, keep up the good work.
Excellent tutorial video - keep up the great work!
Excellent video, Many Thanks
An excellent presentation.
Beautiful equipment
Thank you for the explanation.
aah I'm a fanboy for rhode & schwarz equipment, especially the really old stuff is not only capable but also beautifully built. the old units were often called "Rostig & Schwer" - german for Rusty and heavy..because they are.
Yeah we got a Rhode spectrum analyser at work and the entry level price is 50 grand
great, great video, BR
Can we use nichrome resistance wire as a load for testing discharge Li ion batteries? The same wire that is use in vaporizers or I think as well in fan blowers. Im afraid it could behave as short for the battery. Thanks for any info.
Exelent Channel, tks for all.
Awesome video! :)
Good video thanks. Can this device also be used to record the charging of a battery (with another source) and show a plot of V against time on a laptop?
Thank you so much for such a nice video...... Which oscilloscope you are using?
Great video. I repair power supplies and use an electronic load. You may be able to answer my question. Some linear PSU's don't seem to like being switched on with an electronic load preset to a CC value, for example, load preset to 5amps maximum capability of PSU 10amps. the PSU sees the load as a short and goes into short circuit protection the PSu works ok if I slowly increase my CC to the maximum, I don't get this problem if I attach a resistance load. is this a phenomenon you have come across, or is it my electronic load settings, I usually only use it in CC mode.
keen.... can we use the middle one to test slew rate of amplifier
Just grabbed a Rigol 3021, for the price, it's fantastic.
Can this device also be used to record the charging of a battery (using another source)and show a plot of V against time on a laptop?
That BK sounds like my Kikisui. Great video.
Love these.
Mogul NV book XP
120320/0305H PST-1105H UTC. Greetings from California. Thank you for the introductory information on the 3 variants of EL. For Home DIY hobbyists the first device seems to be a suitable unit than the other 2 devices. There was not much description on the cheapest device, therefore please present a detailed working description on it. Many Electronics enthusiasts will be thankful to you.
Unscrupulous Battery sellers do cheat DIY buyers by selling B grade or substandard LiFePo4 cells with lower capacity.
The Label may exhibit the Cell capacity, which may not true. (I'm a victim) So to help DIY Group, your detailed Audio/Video presentation will be a boon.
A newer model of such EL device has entered the market Viz: ET5420, $200. This device has similar look as the BK Instrument device, perhaps BK unit is made by the same company, EAST TESTER. The contact person of the company
is Cathy Wu . This is FYI.
Thank you and best wishes. Stay safe.
Nice
Excelente
Hey, what is the usage of Vsense that is usually on programmable load?
Were you saying that all 9V batteries are bad, or just the particular brand that you were testing here?
most of them
It keeps bothering me (as hobbyist) but I had the idea that an electronic load would simulate a variable power resistor, it looks like CR mode is needed the most. If I want that would be a bad idea to omit the op amp and make a crude one by using only a 10 turn potentiometer for precision to control the gate voltage of the MOSFET? Plus a shunt resistor for some load sharing and that's it.
Never mind, for one more time I think I discovered the answer after I asked you, there is no stability without the op amp I believe, because of heat I guess, thermal runaway effects etc. I did what I proposed and with stable gate voltage current either keeps increasing or decreasing depending if the MOSFET heats up or cools down. But thank you for being about to reply..! But if try it with op amp and still is not stable I'll be back...
As a fellow hobbyist, I could give a tip on something to buy or build, Tekbox Self Powered Active load. The manual has schematics. I have bought product.
Vast!!😮
Could you compare Easttester ET5410(+) to the middle one you showed? Can it handle 40A continously or will it overheat? How is the build quality and durability expectation? I guess you cant expect too much of these cheaper chinese loads?
I don't have access to an Easttester and have never heard of the company. So I have no way to compare other than a datasheet evaluation.
@@bald_engineerEasttester is no newbee here, but thanks for your answer.
Re: battery tester - 4:25 "if you're clever you can sorta use it as a constant load". Well ... what cleverness would you need?
Checkout their Tenma 72-13200
Sucks that Farnell Switzerland won’t sell to consumers any more...
Why don't they?
You can also find some bulletproof older stuff from HP/Agilent second hand on eBay, which is certainly still usable!
Shipping is usually crazy though, since they're heavy. And used test equipment on eBay is a bit of an overpriced dumpster fire right now for some reason... Things were more reasonable just a couple years ago. YMMV
Sir, Can I use a load tester as variable DC power supply ? I have an old scrap model FUJITSU DENSO EUL-300D
No.
ok many thanks for your reply.
The above load tester which I have mentioned FUJITSU DENSO EUL-300D which is a scrapped one is not working and many be 20 years old. Can I restore this and can I use this for some more years ? Is this old stuff compatible for the current technology ?
waiting eagerly for your reply
Assume the tester is in worst condition
Sir, thanks for your reply. I am a Mechanical Engineer and I have moderate knowledge in electronics but my friends are electronics engineers who help me in restoring.
But my important question is can I utilise this old piece for another 3 or 4 years ? PLz let me know about the usability for some years.
🇳🇱🤪🤪🤪🤪🤪👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍
Turns out I've been comparing loads the wrong way this whole time.
How were you doing it? It might help some people know what not to do.
As energy cant be created nor be destroyed so in what form this electronic load dissipates energy which it absorbs from source.
heat, hence the big/loud fans