5PCS HX711 Load Cell Amplifier A/D 24 Bits Precision Breakout Board Dual-Channel Weighing Sensors Converter Modules for Arduino for Raspberry Pi

Used 3 of the 5 so far and they each worked great! The built in ADC converter is useful for when i use the raspberry pi. If your having problems with them it's probably you not the product! And please read the data sheet they are a little tough to finally set up the programming. Here is some tips #1 If your trying to connect a strain gauge directly to it it won't work it needs to be in a wheatstone bridge config. #2 The chip sleeps after 60 micro seconds so if you plan on using something like a raspberry pi you should use a signal.signal type of command to disable interrupts. Arduino or ESP32 will be a better / easier choice. #3 it calculates the change in resistance for the wires connecting the wheatstone bridge too so if you moving anything around the readings will keep changing.

Works great with the Arduino. No luck with Pi. It would give readings but they never changed when I added weight to the load cell. Works as expected with Arduino though. 🤷‍♂️

Faster sampling rate mod wasn't too hard. Pick to scratch of the trace. Clip and tin the resistor lead. And a good fine point soldering iron.

Worked perfectly as advertised. Great value!

The E- terminal is not connected to ground and therefore these boards will not work unless you apply an external jumper. This wasted a lot of my time trying to figure out. Don’t buy, save your money.

This product was advertised as supporting 80 SPS but to do that you need to pry up pin 15 from the board and solder a 10K pull-up resistor across pin 15 and VCC. Since it is a tiny chip this requires surgical precision and is a half-you know what solution. It does work fine with 10 SPS.

* Soldering up the headers takes only minutes; most of the time was waiting for the iron to heat * Paired this with a 20 kg load cell from Amazon.ca * These little (they are quite small, about the size of a loony) boards amplify the reading and report it to arduino easily and accurately * Inexpensive and fast shipping. You get 5. I only needed 1; so I have 4 for future projects. I figured if I burned one out or something it was nice to have backups, but these are so easy to use it is a no brainer.

The PIN 15 to select the SPS is soldered to the GND, meaning it is stuck to 10 SPS, there is no normal way to switch to 80 SPS, contrary to what the ad claims.

Each module randomly spits out random data. Not useable.

The E- is not connected to the Ground

2/5 Worked out of the box... Unfortunately needed 3. One had a Pin error and the other two had nan errors... Other than that the 2 working ones work well