2 Sets Digital Load Cell Weight Sensor + HX711 ADC Module Weighing Sensor for DIY Portable Electronic Kitchen Scale Kit (5kg, HX711)

Made a scale with one of these and a raspberry pi, pretty accurate.

Purchased the 10 kg versions. Load cells and HX711 were used with an ESP32 at 3.3V with no issues, and typical accuracy and precision expected. However, took off a star because of misleading information on threaded mounting holes. The design drawing specified two M4 and two M5 threaded holes. All the holes on the 10 kg cells were M4-0.70 threads.

This can only read at 10Hz, other boards such as the SparkFun break out board has an option to cut a trace to make it read at 80Hz, but this board is fixed.

Nice weight measure (this one is the lowest cost I could find). Simple soldering to attach the headers to the electronics board, instructions in the Amazon product help match the wires, I crimped on some dupont connectors I had laying around for easy on/off, then I 3d printed a small base to easily attach a M4 screw at one end, and allow the other end with the arrow sticker to be free floating so the weight can measure. Was easy to find an Arduino library to read, calibrate, and tare the value.Cannot wait to build this into a robot weight measuring device for my robot club. We use a commercial one right now, but a DIY project fits our club way better than a store bought solution.

Rate is NOT selectable as stated in the description. It only samples at 10SPS and there is no way to change it to 80SPS. Seller sent me to a GitHub page as an answer to this question but there is no info on rate in the github link.

I bought these in anticipation of using them for a project, to which I am now getting. I need to build my platform, but have been working with the HX711 boards and a Python library that I found on line. Since I have not formally mounted these, I cannot speak a great deal to their accuracy, but a note of caution - if you find a library online and there are comments - read ALL of the comments, I discovered the article had errors and the author has done nothing to correct them.Use the wiring scheme presented here on Amazon.Use one cell per HX711 since channel B does not have the same options as channel A.I found the HX711 works with 3.3 volts (RPi) as well as 5 volts (also RPi, but the GPIO's are rated at 3.3 volts and will burn out at 5 volts, but I tried 5 volts and my RPi is working, but went to 3.3 volts)The HX711 mounting holes are around 2.6mm, definitely less than 3 mm (M3), Amazon has screw kits for M2.x screws, watch for the flat head v pan/hex/etc - the flat head could split your board if you get it too tight.

The load cells work to 20kg, and are relatively linear. My only complaint is the circuit board that came with it. It has good resolution (24 bits) and good gain, but the sample rate is fixed at 100ms. The chip is even capable of higher than that (12.5ms) but the PCB design has hard-wired it to be locked at the slower rate for some reason.

Load cells work well but the schematic for the HX711 pcba is wrong. Also, it is missing a trace to ground the chip.