Reddit reviews CHENBO(TM)4Pcs 50kg Load Cell Body Scale Weight Weighting Sensor Half-bridge/Amplifier with 1pcs HX711 A/D Module
We found 2 Reddit comments about CHENBO(TM)4Pcs 50kg Load Cell Body Scale Weight Weighting Sensor Half-bridge/Amplifier with 1pcs HX711 A/D Module. Here are the top ones, ranked by their Reddit score.
Load cell-This load sensor, sometimes called a strain gauge, is the same one found in digital bathroom scales (you know, the ones you use in January for your New Year’s resolutions, and then forget about a month later).HX711-This module uses 24 high precision A/D converter chip hx711. It is a specially designed for the high precision electronic scale designwith two analog input channelthe internal integration of 128 times the programmable gain amplifier. The input circuit can be configured to provide a bridge type pressure bridge (such as pressureweighing sensor mode)is of high precisionlow cost is an ideal sampling front-end module.LOAD CELL SPECS - 34 mm x 34 mmHx711 SPECS-Selectable 10SPS or 80SPS output data rate;Operation supply voltage range: 2.6 ~ 5.5VPackage:4 x human scale load cell sensor ; 1X HX711 Module
Yeah. These:
https://www.amazon.com/gp/product/B07D6HYYSN/ref=ppx_yo_dt_b_asin_title_o07_s01
Paired them with an ESP8266 running ESPHome.
I built some custom scales using scrap hardwood and an HX711 AD converter and four 50kg load sensors for each scale. I'm running a very buggy and slightly modified version of tatobari's hx711py library on the raspberry pi to pull weight settings, but the readings are very shaky and extremely sensitive to changes in temperature, so it's only accurate to about +/-5% (which I'm comfortable with now). I have hardcoded tare weights for full and empty kegs/CO2 canisters, so the python script is sending a calculated percentage to the influxdb database (housed on another, more stable machine in my house) using the influxdb API.
My solution is a little janky but it came together quickly with tools that I'm familiar with. Other folks on r/homebrewing have come up with similar methods and PLAATO just introduced a commercial solution for weighing kegs.