EnviroDIY | Cdavis | Mentions https://www.envirodiy.org/members/craig607/activity/mentions/ Activity feed mentioning Cdavis. Sat, 25 Jul 2026 12:27:09 -0400 https://buddypress.org/?v= en-US 30 hourly 2 f7b5d104248d3b1163ed14733ee27a8c neilh20 replied to the topic DIY auto sampler in the forum Infrastructure and Equipment https://www.envirodiy.org/topic/diy-auto-sampler/#post-16891 Thu, 31 Mar 2022 22:23:32 -0400 @craig607 yes totally agree, spit balling or back of the envelope sketch 🙂
So great – you can see I’m asking the dumb questions, and if some one has to pick up the bottles every so-often, then can also switch out the power source batterys :).

I see now how the hardware fits in, and found the schematics…[Read more]

]]> f09a96397284f2a67244557cd5594c2a neilh20 replied to the topic DIY auto sampler in the forum Infrastructure and Equipment https://www.envirodiy.org/topic/diy-auto-sampler/#post-16889 Thu, 31 Mar 2022 20:26:13 -0400 @craig607 great to see the stepper functionality and managing it with the GCODEs though I wasn’t clear what the Marlin board is, and how it gets activated. Is the relay the power switch ON, or a pull to ground input.
This probably says how basic my view is, looking at powering, the 4.2V is nice as it maps to a LiPo battery, though LiPo are 4.2V…[Read more]

]]> e637358a05b36d09dd47538cd131a8f6 neilh20 replied to the topic DIY auto sampler in the forum Infrastructure and Equipment https://www.envirodiy.org/topic/diy-auto-sampler/#post-16887 Thu, 31 Mar 2022 16:17:03 -0400 @craig607 fascinating, thankyou for the brainstorm.
Looking at the stepper motor power draw, seems like managing where that power draw comes from would be part of the design. For one source of steppers that give a range of V and A, there is a lot of choice https://www.adafruit.com/?q=stepper&sort=BestMatch
Happy to brainstorm that part if its useful.

]]> 64a793f2a038f4383f821a90652ef31f Heather Brooks replied to the topic DIY auto sampler in the forum Infrastructure and Equipment https://www.envirodiy.org/topic/diy-auto-sampler/#post-16876 Fri, 25 Mar 2022 13:23:59 -0400 @craig607, thank you for posting this! Would you consider expanding on it as a guest blogger here on EnviroDIY?

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