Pretty PSU

[MarkMLl]

Has anybody looked at one of these PSUs with a big LCD screen

https://www.banggood.com/HR3006-30V-6A-Intelligent-Voltage-Regulator-Current-Power-3A-Oscilloscope-Meter-With-Fast-USB-Charging-Port-Phone-Repair-Tool-p-1530658.html

I've been unable to locate a manual, source of firmware upgrades or manufacturer, but the "upgrade connector" on the front suggests to me that it's got something "Arduino-like" inside (not necessarily an AVR, and even if it is an AVR possibly with a custom boot loader like the little DSO112 'scope).

Reviews aren't brilliant, but apparently it does have a two-channel 'scope normally showing voltage and current... I find myself wondering whether it could be repurposed to monitor e.g. the QuickCharge and/or Apple handshake protocol when something is plugged into the smarter USB connector.

MarkMLl

[Synapse_Gap]

G'day Mark,

I just ordered an HUITOO HR3006 Power Supply on AliExpress.
Had to dig really hard to find the manufacturer ... Guangzhou HuiToo Computer Co. Ltd.

Here's the link to the HR3006 page ... http://www.huitoo.cn/index.php/product/index/g/e/id/12.html

Software update is available, but no PDF manual.  Perhaps you can email them for help ... [email protected]

Cheers

[MarkMLl]

Thanks for that. I'd got as far as HuiToo before but hadn't for some reason found their download page.

Assuming that we're both looking at http://www.mictouch.com/filedown/HR3006_Update_v2.7.zip there's a whole lot of stuff in there relating to a soldering station and possibly some sort of charger, but nothing obvious related to HR3006 (or even plain 3006).

Please let us know how you get on with it, I find myself wondering whether it's sufficiently general-purpose to be able to be hacked to display the "Are you a charger?" negotiation when something's plugged in, or possibly even measure USB cable resistance.

MarkMLl

[mikeselectricstuff]

A few short vids on it if you search HR3006 on Youtube
https://www.youtube.com/results?search_query=hr3006

[MarkMLl]

Thanks Mike, seen them. Don't really drill down to the underlying architecture which is what I was prodding at.

Not sure I can justify buying one this month :-)

MarkMLl

[MarkMLl]

I've got myself one of these as an experiment, since provided that it doesn't burst into flames it will be useful for odds and ends of bench work.

It's compact, fairly light and generally speaking appears to be fairly well made. Even without substantial load it gets fairly warm particularly with a side panel off, there's a not-very-quiet fan on the case and a buzzing inductor (which might actually be improving: comments, anyone?).

The SMPS board appears to have three output channels, adequate heatsinks and at least one chunky shunt presumably for current measurement.

Outputs are QC3.0, adjustable-voltage USB, and 3x4mm skts (yellow and black strapped together behind the front panel, so of limited use as a voltage monitor). I don't know whether it is QC3-only, or if it also supports older versions. Electronics comprises an STM32F103 and an HC4051 analogue switch.

Connected to USB it appears as an HID device at 03f7:1111, it emits an HID descriptor but no unsolicited data. I've not explored deeper, and specifically haven't explored how firmware is loaded. The USB logos aren't the official "trident".

The display has a pair of buttons underneath, which move between different screens. The rotary/button control is for setting voltage etc. in the context of a particular screen. Without load there's a bit of measurement jitter, suggesting that what's being displayed is an actual measurement rather than being derived from the setting.

There's an elapsed time indicator, which shows how long it's been turned on; I'm not sure whether this is anything other than cosmetic. If the settings screen says "English", that means "switch to English" rather than "the display is English" :-)

There's a 'scope display for voltage and current, I don't know which channel(s) are monitored yet. I think this is at a fixed 5 mSec/dev, as distinct from e.g. being able to watch how charge current changes over an hour.

I don't believe that there's any indication on the screen of QC etc. events. One thing I'd really like to see is an indication of what a 'phone etc. is actually asking the charger to do, since this would be a useful diagnostic of how it would behave connected to a lesser charger.

But all in all it does look like a fairly hackable device, so it might be possible to add functionality.

The HR3006_Update_v2.7.zip firmware update that somebody located has disappeared from Huitoo's website. There's an earlier HR1203 PSU which appears related, an update's still available from http://www.huitoo.cn/index.php/download/index/g/e/id/2.html I've not checked whether more information survives on archive.org.

MarkMLl

[adamantem]

HI, do you have the firmware file??

[MarkMLl]

HI, do you have the firmware file??

No, but I've not looked particularly hard recently.

On my unit the fan failed after a couple of years continual operation, and the result is that while the PSU can still be set to a predictable voltage etc. the measurement functions are screwed. I've not looked in detail, but my suspicion is that the analogue multiplexer chip fried... I'll investigate when I've got nothing more pressing on my plate.

MarkMLl

[MarkMLl]

As well as being acoustically and electrically https://github.com/MarkMLl/dsocat/blob/main/DSO-Cat_2021-01-29T09_35_07.png noisy, these appear to have a CD74HC4051 analogue multiplexer which is vulnerable to overtemperature... I did say they had a crap fan, didn't I?

If it's still "alive" but all measurements are screwed up, assume it's this chip.

MarkMLl