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All content on EnviroDIY is licensed as Creative Commons Attribution-ShareAlike 4.0. Hardware designs on EnviroDIY are released under the CERN Open Hardware License 1.2. Alternative licenses are available. Learn more
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neilh20 replied to the topic DIY auto sampler in the forum Infrastructure and Equipment 2 years, 6 months ago
@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]
Cdavis replied to the topic DIY auto sampler in the forum Infrastructure and Equipment 2 years, 6 months ago
@neilh20 For my sediment machines I use a high torque 920z Nema 17 motor and is rated for 3.36v and 2.1amps. It works very reliably. The one I prototyped is a 76oz Nema 17 which is rated for 4.2v and 1.5amps. I have a pancake motor as well but they are lower torque. Here is a reference to a number of steppers from the 3d printing side of things:…[Read more]
neilh20 replied to the topic DIY auto sampler in the forum Infrastructure and Equipment 2 years, 6 months ago
@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.
Cdavis replied to the topic DIY auto sampler in the forum Infrastructure and Equipment 2 years, 6 months ago
@heather, I would consider that. I still need to figure out the details on implementation and code.
Shannon Hicks commented on the post, New Mayfly v1.1 release date and Product Status page 2 years, 6 months ago
We sent inventory to Amazon a while ago, we’re just waiting for them to process it and make it available, and I don’t know exact dates until they’ve finished, but if you follow the Amazon links on the Availability […]
neilh20 commented on the post, New Mayfly v1.1 release date and Product Status page 2 years, 6 months ago
Hi Shannon, just wondering if you see that Mayfly 1.1 and Modem will be available from Amazon in single piece qtys? I can only find the Kit at present. Thanks
LLK007 became a registered member 2 years, 6 months ago
LLK007
@llk007
Heather Brooks replied to the topic DIY auto sampler in the forum Infrastructure and Equipment 2 years, 6 months ago
@craig607, thank you for posting this! Would you consider expanding on it as a guest blogger here on EnviroDIY?
Lauren became a registered member 2 years, 6 months ago
Lauren
@lars13
Cdavis replied to the topic DIY auto sampler in the forum Infrastructure and Equipment 2 years, 6 months ago
The pump project that I used can be found here: https://www.thingiverse.com/thing:3148717
Marlin: https://marlinfw.org/
Here is how I currently put this strategy into action. A wifi connected outlet turns the machine on and off.
https://youtu.be/c7tz9yOD6Wc