Teardown & Review of 0-15V CV 1A/5A CC Bench Power Supply 1505DP/1505D

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56K WARNING!!! Ahahah

Following @Heisen’s Incredulation that I’ve never owned an adjustable power supply in the three decades since I first picked up a soldering iron, I did some research and fell in love with this dinky little thing:

It was 2500 and purchased from babaocamachine. I couldn’t find anything cheaper.

But look how cute it is! It came with a power cable, two power leads, and an ESD lead:

Even the butt is cute!

There’s a lot of care in putting this together, the screws are glossy gunmetal and there’s two types. The socket head ones at the rear are not structural, they’re use for heat dissipation, a small but clever touch.

Let’s take it apart!

Just a beautiful construction and layout. Elegance with simplicity. It’s done so well.

ESD lead is earthed:

IEC socket is properly protected with terminal boots:

Enthusiastic heatshrinking on the power button:

Red goop on every connector:

A look at the power supply board:

The control panel:

All of the semiconductors:

I can’t express with words how much I like this retro-clean look:

Now for some testing, starting with Voltage accuracy:

Constant Current at 1A and 5A:

A 5 Ohm load to check Current accuracy:

Real-world use case : CC-limited charging of LiFePO4 cells:

USB port appears to be a fixed 5V output with current monitoring:

The one downside is that the viewing angles of the LCD aren’t great looking up or straight on, it absolutely needs to be below eye-level:

Footnote:

This does have OCP, it’ll cut power if it detects a short and beep, I didn’t document that.

But others on youtube have.

I want another.

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In case someone’s interested in the specific model-
15V 5A Baba 1505DP (rs 2499)

30v 5a-
Korad KA3005D (rs 4389)
Korad KA3005DS (Upgraded model, rs 4444)

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How to turn OCP on and off? So it doesn’t cut off, I don’t see any button.

My only gripe is that most of these chinese bench supplies come with f type plug including mine (korad ka3005ds) so if it’s not properly grounded then it will give you little shock or kill the component you are testing

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The power cable with no earth pin?

Yeah you can almost see that it doesn’t. Which is common with chinese supplies. Even my welding machine came with this shit*ty plug

Rotary encoder has a button, the button’s main function is to turn OCP on or off.

A similar unit with the same functionality:

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Now you can blow stuff up in controlled manner.

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@rsaeon All I want to ask is this - What Camera did you use to take the pristine closeup pics?

Sorry the rest is just too much for my tiny head.

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I guess all photos that @rsaeon posts are taken by DSLR + some non-kit lens, much better dynamic range than any phone camera’s, the colors just pop.

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This is so annoying, idk why the Indian retailers are sending out units with European plugs. KA3005DS from g2m came with the same plug as well.

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Oh you’d be surprised! All of these photos are with the Redmi Note 10 Pro Max, the last phone made with a AF macro lens, even if it’s just 5MP.

The trend then shifted towards telephoto lenses with built-in close focusing, like the Samsung Galaxy Ultra series.

The special-ness is the Leica colour science that was leaked through an apk from a flagship Xiaomi phone a few years ago. But that’s no longer compatible with the current version of MIUI for this phone.

So if I do a factory reset, I’ll lose these customizations forever. There’s no way to preserve what I have without rooting.

But the phone is getting old, it takes a few seconds to launch any app and at least a second or two to switch apps. So the time may be soon for a change.

The future of photography is already here and it’s computational, imagine having Google’s math with Leica’s or Zeiss’s understanding of colours, that’ll make any sensor of any phone look amazing.

Of course there’s no comparison against a large sensor camera and a large aperture lens, but I have more cameras than I do fingers and toes and still I end up shooting with my phone.

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All of these photos were taken with a Sony A57 and a Sony 30mm macro lens:

But does this mean the photos we are seeing are not truly “real”? Real in the sense like less real than DSLR.

When a DSLR captures an image, the process involves straightforward analog to digital conversion, with adjustments dials like ISO, shutter speed, and aperture giving us a very close representation of what’s actually in front of the lens. No artificial bits gets generated which is not in the viewfinder.

In contrast, phone photography, especially with its tiny sensors, relies heavily on computational techniques. The phone compensates for its hardware limitations by enhancing images with algorithmic adjustments. Extra data is computationally generated based on the data directly captured by the sensor, the algorithms have become incredibly skilled at interpreting and “guessing” what the image should look like, making the end result appear remarkably real.

It’s likely due to cost considerations. The factory in China probably uses this cable because it’s compatible with major socket types worldwide, which simplifies shipping and reduces complications.

Retailers usually buy these units as is, and requesting a different cable would disrupt the production process, adding extra costs. So, they stick with the standard cable to keep things efficient.

I bought two different bench power supplies both came with this cable. Both supplies are made in china.

No, they’re all real — I meant computational in the sense that things that are traditionally considered flaws, like distortion, chromatic aberrations, noise, low dynamic range, etc are fixed before the image is saved.

Canon’s already doing this with their mirrorless cameras. If you take their lenses and put it on a non canon-camera, you’re going to be shocked to see the amount of distortion it has. But by using clever math, and high resolution sensors, the end user sees a perfectly normal jpg image.

Believe it or not, Apple started this shift many many years ago with the iPhone as a way to work around the physics of small sensors, Google took it and pushed it hard and now everyone else is catching up.

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If you want better leads.

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I should’ve seen this earlier. Korad bench supply doesn’t come with leads.

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