Hello RD Tech. Glad to see you back around. Two questions:
Any progress on a logging version of the communications program?
I see on the 5015 certificate of compliance that there is a model DPS5030. When will that be released?
thank you very much for your question
for logging, there is still not this function
for DPS5030, it will be long time
sorry
My dear friend,
Both you again, long time no see , how are you ? for our products you brought, it is still good? If you have any problem, please tell me, I can help you
Today, we will publish new product USB color LCD display tester meter.
https://www.aliexpress.com/store/product/RD-USB-2-0-Color-LCD-Display-Tester-voltage-current-meter-4-digit-Voltmeter-Ammeter-Temperature/923042_32845522857.html
User manual and PC software download link: My Files
Simple video to show this : New RD UM24C USB full color display tester meter cable resistance measuring communication function - YouTube
There are 2 versions, UM24 (no communication version) and UM24C (communication version by Bluetooth)
there are many advantages: 7 main interfaces, 10 kinds date detection, operation help button, PC bluetooth connection, 10 data groups to store, Micro USB cable impedance measurement, voltage and current graphing…
Now as old rules, at first published 4days, selling at lowest price 9.99 usd (UM24)， 12.99 USD (UM24C), after 4 days, back normal price more than 13 USD ( UM24), 17 USD (UM24C).
In the market, same quality and color LCD USB meter cost more than 20 usd. So please check it, hope you like it
If you don’t like it, please ignore me
Have a nice day
Best Regain
Glen
BTW, home page : https://rdtech.aliexpress.com/store/923042
Power supply page: DC-DC Power Supply module - Shop Cheap DC-DC Power Supply module from China DC-DC Power Supply module Suppliers at RD Official Store on Aliexpress.com
My dear friend
there is a new products was published again- DPS8005 buck power supply.
https://www.aliexpress.com/item/RD-DPS8005-programmable-constant-voltage-current-Step-down-power-supply-module-Voltmeter-Ammeter-buck-converter-80V/32849962454.html
there are 3 version, No communication version, USB communication version , USB+BT communication version.
Input voltage: 9-90V, output 0-80V/0-5.1A, Most function are same to other DPS series power supply.
But this time, there is new function for PC software, data download and data export.
You can download all file My Files and there is a simple video : New Products DPS8005 Digital control buck power supply 80V/5.1A - YouTube
As the old rules, when new products was published, there is 4 days lower price.
Now no communication version 27.88 USD (normal price 33 USD)
USB communication version：30.43 USD (normal price 36USD)
USB+BT communication version: 32.98 USD (normal price 39 USD)
Only 4 days, please hurry… hope you like it
Lastly, there are 2 kinds power supply case, but they are not suitable for DPS8005, because the fan board MAX input voltage is 60v. but you can use the case, not use the fan board
RD official store https://rdtech.aliexpress.com/store/923042
good work, my friend
I like it , but please be careful your wire
Hi. I’m doing tests and I see that the timeout during the Modbus response its +–500ms, it is right? I think it is very high….
1, Our DPS power supply android APP was published today,
A, Now it is only support communication version of DPS3005 , DPS5005 and DPS8005. If you have bluetooth board, you can connect it with android phone (only support android 5.0 and above).
This is the down load link (or you can check their file link ) My Files .
This is the video for APP : Android APP of DPS power supply publish for commummnication version of DPS5005,DPS3005, DPS8005 - YouTube
If you have USB version and not have BT board, you can make order here to buy a bluetooth board https://www.aliexpress.com/store/product/RD-bluetooth-board-for-DPS-and-DPH-power-supply-communication-version/923042_32882334859.html (if you have no communication version, don’t buy it)
B, For other power supply communication version (DPS5015. DPS5020,DPH5005), APP is designing ,in the future Maybe you just update this app on line to get new APP. Now please wait our good news
This is all DPS power supply link, you can check https://rdtech.aliexpress.com/store/group/DPS-digital-control-power-supply/923042_508466030.html?spm=2114.12010108.nav-list.6.5794671dZ5MRbP
2, our new products UM34© USB 3.0 meter and USB load LD25 (25W, intelligence control ). For the old rules, new products are published, there is lowest price in 4 days , UM34 12.99 USD (normal price 16 USD), UM34C 16.98 USD (normal price 20 USD). LD25 8.99 USD (normal price 11 USD ), buying together will more cheaper, please check the link.
UM34© link: https://www.aliexpress.com/store/product/RD-UM34-UM34C-for-APP-USB-3-0-Type-C-DC-Voltmeter-ammeter-voltage-current-meter/923042_32880908871.html
LD24 link https://www.aliexpress.com/store/product/RD-LD25-Electronic-Load-resistor-USB-Interface-Discharge-battery-test-LED-display-fan-adjustable-current-voltage/923042_32882318330.html
UM34© video : New products UM34(C) and LD 25 USB Intelligent electronic load pulished - YouTube
A, UM34© is better than UM24©, same interface with UM25©, have USB 3.0 port.
B, only APP, not PC software, precision is better than UM24©, not better than UM25C,
C, LD24 is digital control USB load, have many protection(OVP,OPP,OTP) , can set the output state and current, big power 25w.
Thank you again for read so many thing, if you want to learn more , please check the page
This is our home page : https://rdtech.aliexpress.com/store/923042
Hope you like our APP and new products
Type-C meter TC64 —
1, TC64 Type-C meter, Type-C port is full function port, support Type-C fast charge and most all type-c device, but not Type-c identity resistance (no type-c trigger), Quick charge recognition mode:QC2.0、QC3.0、APPLE 2.4A/2.1A/ 1A/0.5A、Android DCP、SAMSUNG
And Application for PD charger measurement; PD car charger measurement; Type-C U flash measurement, and etc.
Video:
2, As for new products rule, first 6 days , lowest price 7.99 USD/piece, after 6days, normal price 10 usd, please check
3, our UM series APP was updated, one APP can support UM24C, UM34C, UM25C, you just update the old APP to get the new APP
4, For your support, 1 USD coupons (click to get https://www.aliexpress.com/store/selected-sale-items/923042.html?spm=5261.10636610.0.0.28923e5f2WBnPr&es=0zoEZ8%2F9sMa4VUJZWh31nYdeUaf%2Bl%2Btp )for DPS/DPH power supply and UM series Meter(contain AT34 )
DPS/DPH power supply: DPS digital control power supply - Shop Cheap DPS digital control power supply from China DPS digital control power supply Suppliers at RD Official Store on Aliexpress.com
UM series Meter: UM Series Meter - Shop Cheap UM Series Meter from China UM Series Meter Suppliers at RD Official Store on Aliexpress.com
Are all the bench psu’s in this thread the type you have to build a case for? I was looking for a ready built one with everything nicely integrated together. Are those type just too expensive?
You can buy the parts (including the casing) then install yourself or you can contact Liu Liang for a complete assembly.
- Clemence
Yes, all of these come in kit form but they do offer kits now days that make it easy.
When I was searching there was a drastic price increase for a ready made all in one unit and they had much lower specs. For the same price I got a 15A power supply pre-made units only had ~3-5A, which is almost useless for flashlights.
Does anyone happen to know why the typical cheapie bench power supplies, like a 30v 10A, is limited to 10A even when the voltage is turned way down to like 8 volts?
Then we have the DPS5020 which can take that same 30v 10A and put out 20A at say 12v.
I’m not really understanding that. Does the DPS 5020 just have better circuitry in it? Is it a better design overall?
I’m considering buying a cheap 30v 10A bench supply, that can actually output those numbers, and then mount the DPS5020 controller on top of it. I’d mount the electronics of the DPS5020 inside the bench supply case.
I could reroute the output wires of the bench supply to the DPS5020 then route the output of the DPS5020 back to the original output terminals.
So I would power up the bench power supply and set it’s output to a bit more than I need, maybe leave it at 30v 10A, then do the actual controlling through the DPS5020.
Yes it costs a bit more, but I would have a nice looking enclosure in the form factor I want plus have a decent power supply for the DPS5020.
Just a thought.
Maybe their circutry can only support up to 10A before failing so they limit it by that number.
The same way RDS5020 can’t output more than 20A if you use 8V.
RD circutry is better I am sure, but goes by the same principle. There is max current that can be used on both devices.
Not sure what part confuses you…converting 30V/10A to 12V/20A?
One reason for fixed output current can be because it is a linear supply. This means less electric noise on the output current, but more wasted heat (They usual have some transformer taps or use a SCR/Triac to regulate the transformer).
In the case of the DPS series, they are limited by the fixed output current. This is mostly due to current being much harder then voltage to control and the components are rated for that amount of current.
Other cheap power supplies are not so good and will not support the full current / voltage range except under ideal conditions.
Your best idea is to get a cheap fixed output power supply, like a 24v or 48v unit and then connecting the DPS unit to that.
I have 1 DP unit built inside an ATX power supply, it works great but is limited to 11v output. They have buck/boost options now though that could boost the power.
I have another DPS5015 setup with an old 48v server power supply that I use for most things and have no complaints. Although the ripple voltage is higher on this one it does not effect most things we do with flashlights.
The part where one brand (cheapie) is limited to 10A regardless of voltage.
It would be nice if instead of 30v and 10A (300 watt), a cheapie bench supply could also do 8v and 27A (also 300 watt), but it can’t.
I really don’t know much about bench power supplies. I want to learn, though.
I assume the DPS5020 is a switching type due to its small size, light weight, high efficiency and no big coil.
I come from an automotive background, so I know how an alternator generates AC voltage then it goes through a bridge rectifier (3 big diodes, sometimes 6 to improve reliability) and a voltage regulator to get 14-ish volts DC. I guess this more closely resembles a linear type power supply? I’m not sure.
Current is basically always going to be the limiting factor.
Voltage is really easy to handle, you just pick some higher rated components that cost a little more and you can handle higher voltages easy.
Current on the other hand is what makes components heat up and there is no real option for handling higher currents other then getting beefier and bigger components. This can drastically increase the cost and complexity along with needing changes to the entire design.
Same reason that a lot of the older driver designs we used to use worked fine for low currents of ~5A but have major issues when we try to run them at 15A.
The DPS is indeed a switching power supply.
Overall the DPS series is the best bang for the buck that I could find by a long shot for high current power supplies. Most cheap power supplies are limited to around 5-10A max.
This is the supply I used in mine. Seems to work great. https://www.aliexpress.com/item/Single-Output-Switching-Power-Supply-Transformer-Ac-110-220V-to-Dc-60V-17A-1000W-for-CNC/32834100045.html
I haven’t pushed to the upper limits yet but at 10 amps it had no problem.
I used this enclosure. https://www.aliexpress.com/item/KINCO-250-x-190-x-110mm-Metal-Electronic-Enclosure-Project-Case-DIY-Power-Junction-Box-Case/32900527650.html?
Took the enclosure off the power supply and mounted it in the new enclosure along with the DPS5020. Added a 80mm case fan to get more air in and out.
It did take a little enclosure modifying to fit everything and be functionable but it’s doable.
Not exactly cheap, but like TA says for the money and output power, there’s not anything else going to touch it.
If I could find a proper enclosure cheap enough I might go that direction. Unfortunately, the cheapest, and only, case I found in the form factor I want is $130 shipped. This one.
This is why I think it’s better for me to just buy an existing bench power supply, like a cheap 30v 10A, and convert it.
IDK, I’ll keep looking around for a case.
I don’t know if this might be something that would help but I thought I would post it as maybe a option for some.
The old Xbox 360 power supply (brick) that can be purchased used for a few bucks on ebay might make a good low voltage power supply.
The 203 watt model will do 12v at 16.5amps on the output. I use one to power my Icharger, its worked great for several years now.
You have to do a little rewiring buts it’s very simple. Lots of info on google. Xbox made different power models so be sure and check to get the one you need.
This is just a reference to what your looking for, you might even find one cheaper or scavenge one from around the house. 
https://www.ebay.com/itm/Genuine-XBOX-360-203W-Power-Supply-BRICK-ONLY-Tested-Clean-Con-Fast-Shipping/223241682370?