A fan lying flat on the bench will "freewheel" (the air gets sucked out and the blades will have no resistance on them.) This sounds much different than a fan operating properly. Just something to factor in. Great project!!! Thanks!
Nice build-up, respect. Only one question: Doesn't block the transformer the air flow? The housing seems to be too small for your project. I really like the way you make your own front and rear panels. Thumbs up!
Thanks! No, the transformer only in way of 1/8 of the area of the fan intake and is nearly 1.5cm away so it's effect is negligible. Yes, the case is a little tight. I wanted it to be the same case as the little power supply you see at the end (above the load) in that shot of the little lab in my office.
No whine at all for me and I can't even hear the fans at the beginning so all's good ! I must say that front panel is beautiful ! we are so lucky to be able to have our ideas turned into reality nowadays and at a sensible price too...yeah 10/10 from me for artwork and functionality and what a great little series. I will be without doubt looking to build one myself based on your design if I may ! but I think I will design my PCB around a decent heatsink that I have lying around as they ain't cheap, don't think I will be able to improve your panel design !...Where can I find the last rev of the circuit please PCBWAY ? cheers.
Good - no whine!! Thanks also for your kind remarks. I'll post the schematic in the description here in a couple of days along with the updated gerber files. Putting it on PCBWay might be very difficult as a couple of subassemblies are involved (the coarse/fine current control and the ammeter) that would be difficult to shoehorn into their template. Cheers!
any heating element, i would just nut-bolt them with heat paste and aluminum plate to the cabinet itself. since a meta cabinet is not too bad of a heat sink. but that was nice too.
The schematic and gerber files will be added into the description in a few days. We're dealing with nearly a meter of snow here and frequent power outages.
Hi Andy. I'm dealing with a lot of weather related issues. We've been having snowstorm after snowstorm and it's taking all of my "electronics" time to deal with snow removal and cleaning up fallen trees. I will try hard to get a link to a package put up today or tomorrow. Thanks for your patience!
I am a subscriber, I cliked that I like the project too. BUT I know these sound like a small things, but they aren't. Your mains input power tags are not properly insulated. Did you add a fuse (add one internally if need be). DId you earth the metal case???? When you were handling the unit, it was working with the top off, you could have easily electrocuted yourself. I worked in a repair center, and we all hated working on home built stuff due to the high risk of things like that. I received a 30 second long 240volt mains electic shock (I could not let it go) from exactly that scenario when I lifted up a home brew HAM radio in for repair. Amazingly, Im not dead, but most people would be. Please earth the case, fully insulate mains, at the input plug, power switch, fuse and transformer if it has metal tags. I see yours doesnt but other might have that on their transformer. Oh, I stopped my electrocution by throwing the radio on the floor so the sheer weight took it out of my frozen hands. It took me 2 days to fix the radio afterwards.
Thanks for being a subscriber and for your ProAdvice. However: > The case is grounded by a green wire from the IEC connector to the closest screw holding the transformer in. You can hear me mention my intent to do that @8:35 and you can see it clearly @9:56. > The unit is fused. The IEC connector has a fuse holder and in it there is a 150 mA fuse installed. It will not work without a fuse. You can see the fuse holder in the IEC connector @10:02. > The connections to the IEC connector are: Top is ground, next is neutral and bottom is live. It would take an effort on my part to come in contact with it. The connections to the transformer are under the circuit board. The only place one might accidentally come in contact with the mains by handling it would be the power switch at which point the terminals are insulted with heat shrink. I'm sorry to hear about your experience, but that would not be a likely occurrence with this device. Kudos on your 40 years of experience. I have 17 more than that in very much the same categories. I look forward to your first videos. 👍
Hi All, the project files (gerbers, schematics, program) have been added in the description. Have fun!
Cheers !
No high pitch squealing in this video mate, great fix , keep up the good work 🤙🏼🇦🇺
Thanks!
A fan lying flat on the bench will "freewheel" (the air gets sucked out and the blades will have no resistance on them.) This sounds much different than a fan operating properly. Just something to factor in. Great project!!! Thanks!
Thank you!
Nice build-up, respect. Only one question: Doesn't block the transformer the air flow? The housing seems to be too small for your project. I really like the way you make your own front and rear panels. Thumbs up!
Thanks! No, the transformer only in way of 1/8 of the area of the fan intake and is nearly 1.5cm away so it's effect is negligible. Yes, the case is a little tight. I wanted it to be the same case as the little power supply you see at the end (above the load) in that shot of the little lab in my office.
No whine at all for me and I can't even hear the fans at the beginning so all's good ! I must say that front panel is beautiful ! we are so lucky to be able to have our ideas turned into reality nowadays and at a sensible price too...yeah 10/10 from me for artwork and functionality and what a great little series. I will be without doubt looking to build one myself based on your design if I may ! but I think I will design my PCB around a decent heatsink that I have lying around as they ain't cheap, don't think I will be able to improve your panel design !...Where can I find the last rev of the circuit please PCBWAY ? cheers.
Good - no whine!! Thanks also for your kind remarks. I'll post the schematic in the description here in a couple of days along with the updated gerber files. Putting it on PCBWay might be very difficult as a couple of subassemblies are involved (the coarse/fine current control and the ammeter) that would be difficult to shoehorn into their template.
Cheers!
:)
Great work! That is much, much better! Also, I do like the new camera, do you mind sharing what camera it is?
Thanks! The camera is a Canon EOS R50 with the kit lens. It works and is quite intuitive.
any heating element, i would just nut-bolt them with heat paste and aluminum plate to the cabinet itself. since a meta cabinet is not too bad of a heat sink.
but that was nice too.
That is sometimes a solution, but tis case is kind of weird. The different parts are not thermally connected.
I may missed it, could you please provide a link to the schematics? Thanks.
The schematic and gerber files will be added into the description in a few days. We're dealing with nearly a meter of snow here and frequent power outages.
Me again ! have you posted the schematic anywhere yet please ?
Hi Andy. I'm dealing with a lot of weather related issues. We've been having snowstorm after snowstorm and it's taking all of my "electronics" time to deal with snow removal and cleaning up fallen trees. I will try hard to get a link to a package put up today or tomorrow. Thanks for your patience!
@@uni-byte No worries please don't let me hassle you ! and be careful !
@@andymouse No worries. Files have been added.
I am a subscriber, I cliked that I like the project too. BUT I know these sound like a small things, but they aren't. Your mains input power tags are not properly insulated. Did you add a fuse (add one internally if need be). DId you earth the metal case???? When you were handling the unit, it was working with the top off, you could have easily electrocuted yourself. I worked in a repair center, and we all hated working on home built stuff due to the high risk of things like that. I received a 30 second long 240volt mains electic shock (I could not let it go) from exactly that scenario when I lifted up a home brew HAM radio in for repair. Amazingly, Im not dead, but most people would be. Please earth the case, fully insulate mains, at the input plug, power switch, fuse and transformer if it has metal tags. I see yours doesnt but other might have that on their transformer. Oh, I stopped my electrocution by throwing the radio on the floor so the sheer weight took it out of my frozen hands. It took me 2 days to fix the radio afterwards.
Thanks for being a subscriber and for your ProAdvice.
However:
> The case is grounded by a green wire from the IEC connector to the closest screw holding the transformer in. You can hear me mention my intent to do that @8:35 and you can see it clearly @9:56.
> The unit is fused. The IEC connector has a fuse holder and in it there is a 150 mA fuse installed. It will not work without a fuse. You can see the fuse holder in the IEC connector @10:02.
> The connections to the IEC connector are: Top is ground, next is neutral and bottom is live. It would take an effort on my part to come in contact with it. The connections to the transformer are under the circuit board. The only place one might accidentally come in contact with the mains by handling it would be the power switch at which point the terminals are insulted with heat shrink.
I'm sorry to hear about your experience, but that would not be a likely occurrence with this device. Kudos on your 40 years of experience. I have 17 more than that in very much the same categories. I look forward to your first videos. 👍
I can’t hear too much whining in today’s video compared to previous one. You can change the fans to noctua silent fans they are surprisingly silent.
And I noticed noctua in your list 😂. Great choice
Thanks for letting me know.
@@ponsaravanan Yeah, they are great fans. Pricey but good.