DC precision voltage source project - Page 1
Forum section: electronics / projects

author: niner_007
author_rank: Frequent Contributor
timestamp: June 03, 2020, 04:06:16 am
content: 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 itAnyhow, 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 issueCompact size, about 160mm x 80mmAccepts and can accommodate many battery types within the same enclosure:4 x 18650 batteries-or-12 x CR123 batteries-or-16 x AA batteriesLTZ1000 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 projectsAD5791 as the DACOnly 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

author: jbb
author_rank: Super Contributor
timestamp: June 03, 2020, 05:15:45 am
content: 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.

author: coromonadalix
author_rank: Super Contributor
timestamp: June 03, 2020, 02:33:14 pm
content: https://www.ebay.com/itm/Keysight-Agilent-03458-66509-DCV-Reference-PCA-/283724090177

author: niner_007
author_rank: Frequent Contributor
timestamp: June 03, 2020, 09:17:51 pm
content: Quote from: jbb on June 03, 2020, 05:15:45 amAww, I don't know any of the people here, I only been on the Metrology section of the forum

author: seebeck
author_rank: Contributor
timestamp: June 04, 2020, 02:14:11 am
content: 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-calibratorhttp://bbs.38hot.net/thread-39900-1-1.htmlhttp://bbs.38hot.net/thread-750388-1-1.htmlWith best regards.From Seebeck.

author: niner_007
author_rank: Frequent Contributor
timestamp: June 04, 2020, 07:31:35 am
content: 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.

author: Vovk_Z
author_rank: Super Contributor
timestamp: June 04, 2020, 08:13:46 am
content: Quote from: niner_007 on June 03, 2020, 04:06:16 amWhat 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).