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Author Topic: EEVblog #1030 - $20 DIY Bench Power Supply!  (Read 5392 times)

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Online plazma

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #75 on: October 09, 2017, 05:05:52 PM »


I'm looking to get a couple of DPS3005 comms version to build some automated testing for a product - was about to press go on a Tenma with USB from Element14 and then try and munge a Python script for control and monitoring !

Protocol for the DPS serial seems to be based on ModBus RTU, but I found some Python code someone wrote that can talk to it easily.
There is some good info about remote controlling them here : http://ls-homeprojects.co.uk/dps3005-psu-module-and-modbus-rtu-python-arduino/

Bill.

Here is a translated document about the communication protocol https://drive.google.com/file/d/0B4-iOelpRB0tWjAzUnJZNkVicWs/view?usp=drivesdk
 
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Offline Red Squirrel

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #76 on: October 11, 2017, 03:41:06 PM »
Well I caved.  Bought 3.  :P

Alibaba's site was frustrating me with that annoying modal popup but found some on Ebay too: http://www.ebay.ca/itm/RD-DPS3005-buck-Power-Supply-LCD-color-display-step-down-voltage-converter-/292040632850?hash=item43fefa6a12:g:VwEAAOSwImRYXJme

 

Offline bitseeker

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #77 on: October 11, 2017, 04:05:27 PM »
Just log in to make the popups go away. They're for "new" visitors. (Yeah, nice way to welcome someone for the first time, eh? :palm:)
Some people love tea. Here, TEA is even better!
 

Offline bill.coghill

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #78 on: October 11, 2017, 04:07:37 PM »
Pulled the trigger on 2.  Lets see how long the 'upgraded' shipping takes....
bill.
 

Offline sempaiscuba

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #79 on: October 11, 2017, 11:19:02 PM »
 

Offline StillTrying

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #80 on: October 11, 2017, 11:51:14 PM »
I saw the DP20V2A module on eBay this morning for just £1.98 (GB) with free shipping!

I think the DP versions are harder to set V & I.

"This listing (http://www.ebay.co.uk/itm/New-DP20V2A-CVCC-Programmable-Control-Step-Down-Power-Supply-Module-LCD-Display/292005962189) has been removed, or this item is not available."

Offline Red Squirrel

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #81 on: October 19, 2017, 01:31:56 PM »
Wow that was fast, mine just came in. Did not get a chance to play with it though.
 

Offline dijkmane

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #82 on: October 20, 2017, 07:11:23 AM »
i've used the 50V5A version and build it into an old NAS housing. ;





later modified it a bit and build in a temperature controled fan regulator, same as Dave, i don't trust that little cooling piece on it, on full load it gets pretty hot.
« Last Edit: October 20, 2017, 11:55:02 PM by dijkmane »
 

Offline technogeeky

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #83 on: October 20, 2017, 11:31:32 PM »
I saw the DP20V2A module on eBay this morning for just £1.98 (GB) with free shipping!

I think the DP versions are harder to set V & I.


Yep!

With the DP versions, instead of there being different buttons to change V and I, you instead have to switch through all of the places for both V and I every time using the push-in part of the rotary encoder.

 

Offline Brumby

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #84 on: October 21, 2017, 10:56:55 AM »
UI Fail!
 

Offline Rolo

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Re: EEVblog #1030 - $20 DIY Bench Power Supply!
« Reply #85 on: Yesterday at 11:49:01 PM »
My DPS3005 module arrived yesterday. I ordered the "communications" version with the serial and bluetooth boards.





 


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