{"action":"created","issue":{"url":"https://api.github.com/repos/tatobari/hx711py/issues/2","repository_url":"https://api.github.com/repos/tatobari/hx711py","labels_url":"https://api.github.com/repos/tatobari/hx711py/issues/2/labels{/name}","comments_url":"https://api.github.com/repos/tatobari/hx711py/issues/2/comments","events_url":"https://api.github.com/repos/tatobari/hx711py/issues/2/events","html_url":"https://github.com/tatobari/hx711py/issues/2","id":159677653,"number":2,"title":"How to tare & define 1kg","user":{"login":"u-l-m-i","id":19860868,"avatar_url":"https://avatars.githubusercontent.com/u/19860868?v=3","gravatar_id":"","url":"https://api.github.com/users/u-l-m-i","html_url":"https://github.com/u-l-m-i","followers_url":"https://api.github.com/users/u-l-m-i/followers","following_url":"https://api.github.com/users/u-l-m-i/following{/other_user}","gists_url":"https://api.github.com/users/u-l-m-i/gists{/gist_id}","starred_url":"https://api.github.com/users/u-l-m-i/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/u-l-m-i/subscriptions","organizations_url":"https://api.github.com/users/u-l-m-i/orgs","repos_url":"https://api.github.com/users/u-l-m-i/repos","events_url":"https://api.github.com/users/u-l-m-i/events{/privacy}","received_events_url":"https://api.github.com/users/u-l-m-i/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":15,"created_at":"2016-06-10T16:54:31Z","updated_at":"2016-06-13T11:35:55Z","closed_at":null,"body":"ello Tato,\r\n\r\nthanks for providing your code and explanation,\r\nbut I’m still struggling with a few things.\r\n\r\nFirst: Can you please explain how to evaluate the tare value and the value for the defined (1kg) \r\n\r\nSecond: Maybe depended on above\r\n\r\nWith changing the Vcc to 3,3 V the results get better, but still a very inconstant.\r\nMy scale consists out of 4 Load Cells which are linked as Wheatstone Bridge.\r\n(tare & 1kg as in our example)\r\n\r\ne.g.\r\nEmpty scale:\r\npi@raspberrypi:~/scale/hx711 $ python hx.py \r\n0.000\r\n1.076\r\n-0.043\r\n4.500\r\n-0.033\r\n0.000\r\n-0.033\r\n0.000\r\n0.022\r\n-0.022\r\n-0.033\r\n0.022\r\n-0.011\r\n-0.011\r\n-0.022\r\n^CCleaning...\r\nBye!\r\npi@raspberrypi:~/scale/hx711 $ python hx.py ## with 1kg\r\n0.000\r\n0.043\r\n0.043\r\n0.033\r\n18.261\r\n0.011\r\n0.196\r\n0.022\r\n0.087\r\n0.087\r\n0.000\r\n0.011\r\n^CCleaning...\r\nBye!\r\npi@raspberrypi:~/scale/hx711 $ python hx.py ##wtih 5kg\r\n\r\n0.000\r\n0.022\r\n0.033\r\n0.033\r\n0.076\r\n0.043\r\n0.043\r\n0.065\r\n-0.011\r\n0.022\r\n0.033\r\n^CCleaning...\r\nBye!\r\npi@raspberrypi:~/scale/hx711 $ \r\n\r\nAny idea or advice?\r\n\r\nThanks \r\nu-l-m-i"},"comment":{"url":"https://api.github.com/repos/tatobari/hx711py/issues/comments/225556860","html_url":"https://github.com/tatobari/hx711py/issues/2#issuecomment-225556860","issue_url":"https://api.github.com/repos/tatobari/hx711py/issues/2","id":225556860,"user":{"login":"tatobari","id":7002585,"avatar_url":"https://avatars.githubusercontent.com/u/7002585?v=3","gravatar_id":"","url":"https://api.github.com/users/tatobari","html_url":"https://github.com/tatobari","followers_url":"https://api.github.com/users/tatobari/followers","following_url":"https://api.github.com/users/tatobari/following{/other_user}","gists_url":"https://api.github.com/users/tatobari/gists{/gist_id}","starred_url":"https://api.github.com/users/tatobari/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tatobari/subscriptions","organizations_url":"https://api.github.com/users/tatobari/orgs","repos_url":"https://api.github.com/users/tatobari/repos","events_url":"https://api.github.com/users/tatobari/events{/privacy}","received_events_url":"https://api.github.com/users/tatobari/received_events","type":"User","site_admin":false},"created_at":"2016-06-13T11:35:54Z","updated_at":"2016-06-13T11:35:54Z","body":"Hi!\nI'm not sure if you are aware but three wire load cells are basically\nhalf-wheatstone bridges and wiring it is not as intuitive as it looks.\n\nI've found a very usefull product in sparkfun.com that may help you with\nthat. Here's the link:\n\nhttps://www.sparkfun.com/products/13281\n\nHowever, if, like me, you're not in a position where getting those products\nis easy (I live in Argentina), here is the link to the schematics of the\ncombinator so you can wire the load cells yourself pretty easily:\n\nhttps://cdn.sparkfun.com/datasheets/Sensors/ForceFlex/SparkFun%20Load%20Sensor%20Combinator%20v10.pdf\n\nJust ignore the RJ45 and JP7 parts. In those schematics, JP5 is the HX711\nwith 5 pins instead of 6. Just ignore the 5th pin (the shield pin) and wire\nthe bridge you made according to the schematics to the other 4 pins just\nlike the schematic indicates.\n\nLet me knw if you have any doubts.\n\nTato\nOn Jun 13, 2016 02:58, \"u-l-m-i\" <notifications@github.com> wrote:\n\n> Hi Tato,\n>\n> after several tests I also suspect the load cell as root cause.\n> I'll check the 4 load cells (3 wires each) & Wheatstone Bridge during this\n> week and will update as soon as it's possible.\n>\n> Thanks for your support & your patience !\n>\n> —\n> You are receiving this because you commented.\n> Reply to this email directly, view it on GitHub\n> <https://github.com/tatobari/hx711py/issues/2#issuecomment-225495122>, or mute\n> the thread\n> <https://github.com/notifications/unsubscribe/AGrZ2fpPZyJ0QlyaO_Kah8QxABB_JhrYks5qLPGNgaJpZM4IzIiI>\n> .\n>\n"}}
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