Finally tackling an aspect of my project to detect/control liquid output.
* Initial approach was going to be using a 'flow meter', but reading on-line/feedback seems to allude that they are actually not very accurate? (odd if that’s the intended purpose?)
* Was suggested that weighing is better/more accurate approach.... hence the adventure started!
Got my first load sensor cell 'kit' off Amazon: https://www.amazon.com/dp/B07GQPV6C4
Nice little 'kit'.. to play with/learn from.. but in the end was just not going to physically fit/work for my current project.
After some searching.. and guessing/hoping.. I ended up buying and hacking apart a digital scale form Harbor Freight: https://www.harborfreight.com/1000-gram-digital-scale-60332.html
I was curious to see what sort of load cell sensor was being used in this, as it was smaller, and physically might fit my needs.
In the end, it was the same 'bar' shaped load cell sensor, but was physically smaller, and would fit my needs. (box/specs stated it only supported up to 1kg of weight though).. almost at my max.. but didn’t want to really limit my project. Was suggested that the 1KG limit might just be the code/software..etc
I hacked apart the HF scale, to keep a portion of the body/enclosure, the metal (top) plate, and the connected load cells sensor. I removed the LCD screen, the amp board and the default buttons. I then took apart the Amazon kit form above to use the HX711 amp board, with the load cell sensor from the HF scale.
It worked, but the HX711 board is/was set to run @ 10SPS by default.. after lifting one of the pins (from GND) and connecting it to +5v.. it now runs @ 80SPS.. which gives much faster feedback.
I have finally implemented the hacked 'Arduino friendly' scale.. into the cup-holder base. I am now at the point where I can swap out the cup-holders with the new scale based one, and start 'testing' Code has been updated already...(but not clue what best way to handle this? currently just a weight checking loop, but should have some sort of future/smoothing algo implemented to plan for future weight targets?)
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I made an oriole feeder with a piece of spalted maple I found in the Norwich trash.
<oriole feeder 3.jpg>
--On Tue, May 30, 2023 at 8:57 AM Pete Prodoehl <ras...@gmail.com> wrote:
Hello Makers! It is now time to share... What have you been hacking on
or making?
Reply to this email with a brief run-down of whatever projects have been
keeping you busy, either at the space(s) or elsewhere.
Include a photo and/or link if you can! Show us something neat! ~[ *
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That’s so cool!
From: 'Tom Gralewicz' via milwaukeemakerspace <milwaukee...@googlegroups.com>
Sent: Sunday, June 4, 2023 4:36 PM
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