Author Topic: DC precision voltage source project  (Read 1689 times)

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Offline niner_007Topic starter

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DC precision voltage source project
« on: June 03, 2020, 04:06:16 am »
I have an idea for a long term project, and as a way to sink my volt nuts into. A DC voltage source very similar to Ian's, focused on precision, linearity, compact form factor and battery life. I love Ian's PDVS v1 but I can never get my hands onto one, he's had a sale on Friday, and I missed it :( Anyhow, even if I had 10 of them, it would not help my voltnutty thirst. What I'm thinking is something among the lines of:

  • No expense spared, cost is not an issue
  • Compact size, about 160mm x 80mm
  • Accepts and can accommodate many battery types within the same enclosure:
    • 4 x 18650 batteries -or-
    • 12 x CR123 batteries -or-
    • 16 x AA batteries
  • LTZ1000 as the reference, but specifically in a A9 03458-66509 module / form factor, mounted on the main PCB. I love the A9 form factor, and its versatility as a precision reference building module for various projects
  • AD5791 as the DAC
  • Only VHD200 and VHP202Z resistors in the precision parts of the circuit. Easily ordered from Vishay.
  • +-10V out with 0.1V, 1V, 10V ranges, maybe more
 

Offline jbb

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Re: DC precision voltage source project
« Reply #1 on: June 03, 2020, 05:15:45 am »
Well, if that’s your thing then who are we to argue :-)

The Metrology page might be a good fit for the high accuracy you want.

The Projects page might be good for non-precision aspects. For example, rechargeable lithium cells (LiIon, LiPo, LiFePO4 all in same boat) could make shipping annoying as they’re not supposed to be over 30% full and I assume you want always-on.
 
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Offline coromonadalix

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Offline niner_007Topic starter

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Re: DC precision voltage source project
« Reply #3 on: June 03, 2020, 09:17:51 pm »
Well, if that’s your thing then who are we to argue :-)

The Metrology page might be a good fit for the high accuracy you want.

The Projects page might be good for non-precision aspects. For example, rechargeable lithium cells (LiIon, LiPo, LiFePO4 all in same boat) could make shipping annoying as they’re not supposed to be over 30% full and I assume you want always-on.
Aww, I don't know any of the people here, I only been on the Metrology section of the forum
 

Offline seebeck

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Re: DC precision voltage source project
« Reply #4 on: June 04, 2020, 02:14:11 am »
Hi niner_007 ,

You can see the following posts for your reference if you are interested.

http://bbs.1ppm.cn/topic/340/dc-cal-mini-diy-multifunction-calibrator
http://bbs.38hot.net/thread-39900-1-1.html
http://bbs.38hot.net/thread-750388-1-1.html

With best regards.
From Seebeck.





 

Offline niner_007Topic starter

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Re: DC precision voltage source project
« Reply #5 on: June 04, 2020, 07:31:35 am »
These are good links.

To be clear, I wasn't asking for help, but that is absolutely welcome, I mostly know how to proceed and how to get the project done, this was just sharing the idea for the project, and to get people engaged and sharing their suggestions. And as a place to provide updates on the project.
 

Offline Vovk_Z

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Re: DC precision voltage source project
« Reply #6 on: June 04, 2020, 08:13:46 am »
    • LTZ1000 as the reference, but specifically in a A9 03458-66509 module / form factor, mounted on the main PCB. I love the A9 form factor, and its versatility as a precision reference building module for various projects
    • AD5791 as the DAC
    • Only VHD200 and VHP202Z resistors in the precision parts of the circuit. Easily ordered from Vishay.
    • +-10V out with 0.1V, 1V, 10V ranges, maybe more
    What accuracy do you need? "0.1V, 1V, 10V ranges," for usual multimeter we can get by cheaper IC. If we use LTZ1000 - to get its all long-term etc stability - it needs mains power (it have to be 24/7 powered).
     


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