Notifications
Clear all

Bench Power Supply Power Leads

9 Posts
3 Users
2 Likes
368 Views
arrowj
(@arrowj)
Active Member
Joined: 1 year ago
Posts: 12
Topic starter  

Greetings

It has been some time since my initial post, and I am still very much at the beginning of my electronics journey,

I purchased a 30V 10A RockSeed Bench top Power Supply (sold under many names). I also have a Pinecil soldering iron. I ordered two USB C power cables from Pine64, but I am curious if it would be safe and functional to cut one end and solder on a banana plug so I can use my power supply to run the iron.

I am also curious about any universal banana leads to "x" solutions that anyone has created. You can buy several various power leads that connect via banana plugs, but it would be nice if the other end had a connector that could connect to various barrel jacks etc rather than rolling a new cable for each application I may find.

Any info on your own solutions, suggestions, suppliers, etc. is appreciated.

Note: For anyone else that is considering this power supply there is a great walk through on the Hanmatek variant (which will apply to the others as well) on the YouTubes, and the creator of that video also reworked the instructions .pdf from Chinglish to English.

rockseed power supply

   
E.Danil reacted
Quote
Ron
 Ron
(@zander)
Famed Member
Joined: 2 years ago
Posts: 3392
 

@arrowj Wow, that certainly looks impressive, my home made power supplies aren't quite so neat.

Even USB-C is only max 100W so not sure how that will power a soldering iron pencil. I have to admit I don't know the wattage, but judging from my own pencil it seems like an awful lot more than 100W.

I have banana plugs, various other 'ends' and a spool of 18AWG silicone wire with HD insulation thickness. Make anything I want. The 'standard' universal end thing is 4mm.

Have you seen Bill's power supply videos? There are two, one is for small stuff (95W laptop brick) and the other is several hundred watts from an old PC or in my case purchased as I have no old PC's kicking around.

Here is what I started with Set of leads

 

"Don't tell people how to do things. Tell them what to do and let them surprise you with their results.” - G.S. Patton, Gen. USA
"Never wrestle with a pig....the pig loves it and you end up covered in mud..." anon


   
ReplyQuote
arrowj
(@arrowj)
Active Member
Joined: 1 year ago
Posts: 12
Topic starter  

@zander

The first batch of Pinecil's were rated 12-24v @ 65W. After some heated discussion on the discussion group, it was decided that it would be downgraded to 12-21V @ 60W, due to concern over the connection of the DC jack to the USB-PD chip, which has a recommended maximum of 21v, and absolute maximum of 28v. --Pine64 Wiki

I have not used it yet as I am still waiting on some supplies, but I powered it with the Lenovo 65W GaN charger (PD 3.0) for my Laptop and it works a treat. Extremely fast, and that particular charger does not require adjusting the PD setting of the iron as is apparently the case for certain devices that do not negotiate power requirements quickly enough.

I was wondering about the size of connector and appropriate wire to have on hand. Thank you!! I also bought that kit (under different branding). I think it will handle most of my testing needs, and I am getting ready to use them now to get familiar with the power supply. Mostly I want to make up custom cables for charging Li-ion batteries, powering μcontroller boards, and things of that nature. I could also wire up a barrel jack for the iron I suppose. I am not sure if the PD circuitry is in both ends of a USB C cable and cutting one end off would ruin it. Maybe a barrel connector would be a better choice.

EDIT: I have not watched those videos, but one of them is in my queue. When I want a second power supply I intend to go that route.

This post was modified 6 months ago by arrowj

   
ReplyQuote
E.Danil
(@e-danil)
Active Member
Joined: 2 years ago
Posts: 11
 

It isn't a problem if your using a micro or mini usb. But type c has something called power delivery.

It allow you to get not only 5v but also 9v,12v,15v,20v.

This video from great scott makes it clear


   
arrowj reacted
ReplyQuote
arrowj
(@arrowj)
Active Member
Joined: 1 year ago
Posts: 12
Topic starter  

@e-danil I was wondering if PD or QC chips built in to the cable would cause issues. A Great Scott video I have not seen. Added to my queue. Thanks!


   
ReplyQuote
E.Danil
(@e-danil)
Active Member
Joined: 2 years ago
Posts: 11
 

@arrowj please watch the video to understand what I am trying to say

 


   
ReplyQuote
arrowj
(@arrowj)
Active Member
Joined: 1 year ago
Posts: 12
Topic starter  

@e-danil I watched it immediately.  Great explanation. I am going to make up a barrel jack to banana cable instead. Thank you much!


   
ReplyQuote
E.Danil
(@e-danil)
Active Member
Joined: 2 years ago
Posts: 11
 

@arrowj I am wondering where would you connect the barrel jack to. one side banana leads the other side what

This post was modified 6 months ago by E.Danil

   
ReplyQuote
arrowj
(@arrowj)
Active Member
Joined: 1 year ago
Posts: 12
Topic starter  

@e-danil Banana leads to bench power supply and barrel jack to Pinecil


   
ReplyQuote