We just measured the ripple on the couple of these we have in our lab for basic testing. Anywhere above 2.4 to 3 A at a higher voltage draw (in our testing, 28V) will send the ripple into a frenzy (at 5A, we saw around 3.5V peak to peak) These damaged a piece of equipment doing that, so they're being relegated for non-critical work.
Thanks Hamed for the unboxing. I recently bought the same power supply (I think, at least from the similarity of the outer shell) and your unboxing will really help me when I unpack mine!
you're most welcome Rick, I have a larger better looking one than this one but I rarely use it and use this one every day lol Its a brilliant little psu, havent had any issues with it at all.
Good to know the cheaper options are decent, I have had so many times where I would've loved to have basically any form of adjustable power supply but never bit the bullet since the ones in local stores are quite expensive, I don't need the maximum precision anyway. Going to be particularly useful for testing LEDs to figure out a good balance between brightness and power consumption
Yeah I felt the same way about cheap power supplies but this one is actually my most used one I have. It's small and lightweight so I just naturally use it more than my larger heavier ones that require some serious energy to move lol.
@@HamedAdefuwa yeah I looked into them a bit more and I think I'm at least getting a unit where you can turn the output off instead of only the entire unit, seems like these require you to short the leads to adjust the current limit and it's inconvenient to have to disconnect the leads every time you want to make adjustments
You can't "pump" current into the circuit without it being used in the circuit. This feature of the power supply would be used to "limit" current. So if a LED could draw 2amps, you could limit it to only draw 1amp and ramp it up to 2amps, but you wouldn't be able to pump 3amps into it.
its based on your circuit. The current is mostly used as current limiting. Get a 12V computer fan and run it on 15V. Then turn down the current on your PSU. You'll see the CC for current limiting LED come on and the current reduce.
3.2 pounds is 1.45 kilos. I could go out further but I don't think you will be doing anything with this thing that would require you to know its weight to the ten thousandths place or even the thousandths as far as that goes.
Lol help me out here I'm old, what are you referring to? In terms of its weight/size, It suits one of my workbenches nicely because of limited space but I'm not a fan of the tall/skinny height. I do knock the thing over a lot (whilst on) and sometimes it concerns me that I'll do some damage to a circuit I'm working on or worse. I do still like it though, use it multiple times a week.
You didn't wind it up to ten amps, you barely hit 300ma. They have a duty cycle of about ONE MINUTE, take it more than that and these little Chinese fire crackers put on a real pretty light and magic smoke show. For starters, not a single eBay/Amazon listing for these junk power supplies, or their boxes/instruction contain a shred of real data about the device, they literally print anything that want to sell it. They're also thrown together in child-labour sweat shop style factories, in the outer provinces for peanut wages. No quality control, blatantly and complacently made the Chinese way with hot snot and a prayer, who have no moral concerns for 220 vac mains electrical safety. If you want to waste between £50 and £150 on a single or doubled up version, you may as well throw it directly into your wheelie bin.
Thanks I'd say everything you mentioned is valid completely, I appreciate the detail as well. My counter argument is that this wouldn't be for someone like yourself with your level of knowledge. After 2 years of studying electrical engineering I still have absolutely no idea how I'd be able to test this at 10A or how to increase the duty cycle. I wouldn't even want to try at that kind of current. I'm scared of inverters lol. I don't expect any of these cheap Chinese products to perform anywhere close to their rated specs. For someone like myself (student so low income & low skill), I think it's far safer to use one of these than it is to build my own PSU for £20 as I've heard TH-camrs say. I've had similar conversations about my cheap Oscilloscopes or function generator. They're useless at their max ratings (or even near them) but us total noobs are never going to need that kind of performance/quality.
@@HamedAdefuwa Great reply my friend, indeed, I've learned expensively over the decades, that quality comes at a price and there's no getting away from the fact that the vast majority of cheap Chinese mains operated electronics, poses even more of a risk of injury and instant death to novice users like yourself. There is a good reason for having proper training and a good working knowledge of mains electricity, simply put.... IT CAN KILL THE UNWARY INSTANTANEOUSLY WITHIN A SINGLE HEARTBEAT, MAKING IT THE LAST ELECTRICAL LESSON YOU'LL LEARN.
🤣 Thanks for watching, I'm a step closer to getting monetized thanks to your viewing time. Oh and you've boosted this video in the algorithm by leaving a comment. Much love. 👍❤️ Btw it is "Do all of you guys.." not "Do you all of you guys..". Best edit your comment.
Timestamps
00:00 Amazon Product Page
2:00 Unboxing
2:55 Cables
3:45 Size Comparison To iPad
5:00 Power Will Turn On
5:40 Manual
7:12 Plugging In Cables
8:00 Testing Resistor
9:30 31V Through Resistor
12:20 Conclusion
Thank you
@@bretonmendozaangelalberto4672 you're welcome :)
We just measured the ripple on the couple of these we have in our lab for basic testing. Anywhere above 2.4 to 3 A at a higher voltage draw (in our testing, 28V) will send the ripple into a frenzy (at 5A, we saw around 3.5V peak to peak) These damaged a piece of equipment doing that, so they're being relegated for non-critical work.
Thanks Hamed for the unboxing. I recently bought the same power supply (I think, at least from the similarity of the outer shell) and your unboxing will really help me when I unpack mine!
you're most welcome Rick, I have a larger better looking one than this one but I rarely use it and use this one every day lol Its a brilliant little psu, havent had any issues with it at all.
Good to know the cheaper options are decent, I have had so many times where I would've loved to have basically any form of adjustable power supply but never bit the bullet since the ones in local stores are quite expensive, I don't need the maximum precision anyway. Going to be particularly useful for testing LEDs to figure out a good balance between brightness and power consumption
Yeah I felt the same way about cheap power supplies but this one is actually my most used one I have. It's small and lightweight so I just naturally use it more than my larger heavier ones that require some serious energy to move lol.
@@HamedAdefuwa yeah I looked into them a bit more and I think I'm at least getting a unit where you can turn the output off instead of only the entire unit, seems like these require you to short the leads to adjust the current limit and it's inconvenient to have to disconnect the leads every time you want to make adjustments
Hi Hamed, thank you for the video.
Noob question : could you tell me why you can't modify the current with the buttons ?
thanks ! :)
You can't "pump" current into the circuit without it being used in the circuit. This feature of the power supply would be used to "limit" current. So if a LED could draw 2amps, you could limit it to only draw 1amp and ramp it up to 2amps, but you wouldn't be able to pump 3amps into it.
@@HamedAdefuwa Thank you Hamed :)
Subscribed. No marbles detected!
😂😂 Might start ending my videos with Mr Marble Mouth. Thanks for subscribing 🙏
need a cheap but reliable bench power supply that wont blow up. any recommendations? 10amp would be ideal
This is my favourite one th-cam.com/video/QPiTSmxVgEk/w-d-xo.html
Link to power supply here: amzn.to/2KKhH82
Hello can you tell me how we can adjust the amperage? In the video it looks like it's always at zero. Thanks
I have the same one. I can't adjust the Amp's no matter how far I turn the knob.
its based on your circuit. The current is mostly used as current limiting. Get a 12V computer fan and run it on 15V. Then turn down the current on your PSU. You'll see the CC for current limiting LED come on and the current reduce.
@@HamedAdefuwa I figured it out after messing with it after commenting. Lol. Thanks for the reply!
Is it possible to use it to cut foam?
Lol I'm not even sure how that would work
Use NiChrome wire
3.2 pounds is 1.45 kilos. I could go out further but I don't think you will be doing anything with this thing that would require you to know its weight to the ten thousandths place or even the thousandths as far as that goes.
Lol help me out here I'm old, what are you referring to? In terms of its weight/size, It suits one of my workbenches nicely because of limited space but I'm not a fan of the tall/skinny height. I do knock the thing over a lot (whilst on) and sometimes it concerns me that I'll do some damage to a circuit I'm working on or worse. I do still like it though, use it multiple times a week.
You pay in pounds. But don't know how much a pound is?
You didn't wind it up to ten amps, you barely hit 300ma. They have a duty cycle of about ONE MINUTE, take it more than that and these little Chinese fire crackers put on a real pretty light and magic smoke show. For starters, not a single eBay/Amazon listing for these junk power supplies, or their boxes/instruction contain a shred of real data about the device, they literally print anything that want to sell it. They're also thrown together in child-labour sweat shop style factories, in the outer provinces for peanut wages. No quality control, blatantly and complacently made the Chinese way with hot snot and a prayer, who have no moral concerns for 220 vac mains electrical safety. If you want to waste between £50 and £150 on a single or doubled up version, you may as well throw it directly into your wheelie bin.
Thanks I'd say everything you mentioned is valid completely, I appreciate the detail as well. My counter argument is that this wouldn't be for someone like yourself with your level of knowledge. After 2 years of studying electrical engineering I still have absolutely no idea how I'd be able to test this at 10A or how to increase the duty cycle. I wouldn't even want to try at that kind of current. I'm scared of inverters lol. I don't expect any of these cheap Chinese products to perform anywhere close to their rated specs. For someone like myself (student so low income & low skill), I think it's far safer to use one of these than it is to build my own PSU for £20 as I've heard TH-camrs say. I've had similar conversations about my cheap Oscilloscopes or function generator. They're useless at their max ratings (or even near them) but us total noobs are never going to need that kind of performance/quality.
@@HamedAdefuwa Great reply my friend, indeed, I've learned expensively over the decades, that quality comes at a price and there's no getting away from the fact that the vast majority of cheap Chinese mains operated electronics, poses even more of a risk of injury and instant death to novice users like yourself.
There is a good reason for having proper training and a good working knowledge of mains electricity, simply put....
IT CAN KILL THE UNWARY INSTANTANEOUSLY WITHIN A SINGLE HEARTBEAT, MAKING IT THE LAST ELECTRICAL LESSON YOU'LL LEARN.
Do you all of you guys talk like you have marbles in your mouth?
🤣 Thanks for watching, I'm a step closer to getting monetized thanks to your viewing time. Oh and you've boosted this video in the algorithm by leaving a comment. Much love. 👍❤️ Btw it is "Do all of you guys.." not "Do you all of you guys..". Best edit your comment.
We do all of us guys in England don’t speak with marbles in our mouth. Hahah
😎