...
I suggest it's time Dave pull out his FLIR camera, power up that failed supply board briefly (maybe outside to avoid the stench?) and really see what's getting hot... and perhaps that will lead to more clues as to the real failure cause. There might be something that failed FIRST upstream of that cap? Or maybe the failed cap caused a second failure?? Let's take a look!
"Nice", and i was planning on getting one from them. After this i think i wait with the purchase until Dave finds out what the hack is happened...
Have ben any response from the manufacturer?
...
I suggest it's time Dave pull out his FLIR camera, power up that failed supply board briefly (maybe outside to avoid the stench?) and really see what's getting hot... and perhaps that will lead to more clues as to the real failure cause. There might be something that failed FIRST upstream of that cap? Or maybe the failed cap caused a second failure?? Let's take a look!
It is hard to imagine a failure mode of a buck converter, that can damage the ceramic cap at the output. The more likely sequence is the damaged cap causing secondary faults.
Yes, Dave didn't really clean the charcoal resistor from the output, but the power supply was drawing too much current even with the output switched off (I think). So that's not it.
FWIW, and IMHO, the photoshopped click-bait previews that have been showing up lately are unbecoming of a serious channel.
I'm betting on that PCB being charred enough between the output terminals that it's now looking more like a smallish resistor than the highly insulating FR-4 that it once was.
I'm betting on that PCB being charred enough between the output terminals that it's now looking more like a smallish resistor than the highly insulating FR-4 that it once was.
That was my first thought, as well...
Dave, why didn't you check the resistance between those terminals in the charred area before you powered it up? I would expect that area to have issues after the cap blew up. Alternatively, if you did check and it seemed to be OK, why didn't you mention that in the video?
FWIW, and IMHO, the photoshopped click-bait previews that have been showing up lately are unbecoming of a serious channel.
I suspect that Dave will just say it's a cost of doing business on YouTube, you have to stand out enough to get the initial attention. It's YouTube, not Electronics Weekly, The Journal of the Institute of Physics or The Economist. I can't say that I like it, but I understand why Dave might feel he needs to do it.
I actually think it is quite sad IF 'Dave feels he needs to do it'
It's his channel at the end of the day. However, channels with an order of magnitude more subscribers do not feel the need to resort to such actions in any way. Hell, A bit of tongue in cheek is one thing, but creating a completely false image and impression of a product from a fair , honest and respected manufacturer is not really appropriate imho. If a product has a problem by all means it has to be reported fairly. If it is cr&p then absolutely say it is cr&p, but fake images ? IMHO they are uncalled for and derogatory and are certainly not the best way to promote anything.
Meanwhile ... back at the ranch... life continues..
I imagine that such flames as depicted in the video thumb are not outside the realm of possibility, given the subject failure.
Why would you want a power supply that needs a power supply to work?
I'm going to ask a dumb question...
Why would you want a power supply that needs a power supply to work? Where are you meant to get the 55V DC required to smoke it if you don't have a PSU to start with?
Aso... Isn't Isolation important? Otherwise you can fry yourself and your stuff with Ground Loops?
Because you can use a cheapo, leftover, fixed voltage supply. eg. an old laptop power brick.
Linustechtips had this exact discussion a few months ago. Apparently, these thumbnails do make a significant difference in regards to popularity. Whether we like or not, unfortunately.
I can imagine it may be perceived as disingenuous or unfair towards the manufacturer.
i have considered buying the same power supply module my self. as I like cool color panel displays with lots of graphics in a kit.
however i do not believe it rated at 50 volts IMO that's way too high for cheap chinese Silicon!
also if they say its 4 amps I do not believe it! as the probability its more like 2 amps max.
take a good look at its cooling! do you believe its wattage. do the thermal test.
derate, derate if its cheap & chinese.
a suggestion, if you can have lights ,& camera rolling whan ever you plug somthing in, or power somthing up,
particularly if its old, or cheap & chinese. getting it all on camera, is priceless
i have considered buying the same power supply module my self. as I like cool color panel displays with lots of graphics in a kit.
however i do not believe it rated at 50 volts IMO that's way too high for cheap chinese Silicon!
also if they say its 4 amps I do not believe it! as the probability its more like 2 amps max.
take a good look at its cooling! do you believe its wattage. do the thermal test.
derate, derate if its cheap & chinese.
a suggestion, if you can have lights ,& camera rolling whan ever you plug somthing in, or power somthing up,
particularly if its old, or cheap & chinese. getting it all on camera, is priceless
Have you not watched Dave's Vid on the smaller modules from the same supplier? They also have what seem like overinflated specs but when Dave characterised one it actually met the specs with very respectable dissipation and efficiency.
FWIW, and IMHO, the photoshopped click-bait previews that have been showing up lately are unbecoming of a serious channel.