Electronics > Projects, Designs, and Technical Stuff

DC precision voltage source project

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niner_007:
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

jbb:
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.

coromonadalix:
https://www.ebay.com/itm/Keysight-Agilent-03458-66509-DCV-Reference-PCA-/283724090177

niner_007:

--- Quote from: jbb 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.

--- End quote ---
Aww, I don't know any of the people here, I only been on the Metrology section of the forum

seebeck:
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.





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