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Description:
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.
Features:
# Two selectable differential input channels
# On-chip active low noise PGA with selectable gain of 3264 and 128
# On-chip power supply regulator for load-cell and ADC analog power supply
# On-chip oscillator requiring no external component with optional external crystal
# On-chip power-on-reset
# Simple digital control and serial interface: pin-driven controlsno programming needed
# Simultaneous 50 and 60Hz supply rejection
# Current consumption including on-chip analog power supply regulator: normal operation < 1.5mApower down < 1uA
# Operation supply voltage range: 2.6 ~ 5.5V
# Operating Temperature Range:-20 degree ~ +85 degree
Applications:
This weighing sensor amplifier module can use to be
weight scales,
kitchen scale,
industrial process control etc...
- Document link:
- h-ttps://github.com/aguegu/ardulibs/tree/master/hx711
- h-ttps://cdn.sparkfun.com/datasheets/Sensors/ForceFlex/hx711_english.pdf
- h-ttps://www.youtube.com/watch?v=nGUpzwEa4vg
Connection diagram
What you will get:
2 X HX711 weight sensor AD module
WILL
2025-08-18 11:47:44
These things work great. There's a ton of information about them online. I am very new to arduinos and programming but I was able to get this working pretty easily.I did not use a pre-made load cell. I created my own wheat stone bridge with single strain gauges and discovered that these will only work in a half or full bridge configuration. All I had to do was connect a dummy gauge and it worked perfectly. If you Google dummy strain gauge you can see wiring diagrams on how to connect them.The output is 0 to 2^24, there is some noise but it is negligibleWould absolutely buy these again.
Stephen Lowther
2025-07-11 14:15:34
Jumps around +- a gram or two, but that could just be the code I wrote for it.
MJJ
2025-06-19 18:43:19
Took a bit to solder them up mainly because I was very rusty. Nice solid units tolerated my heavy hand with the soldering iron. Well packed quick delivery
Yoshihiro Yasuda
2025-06-01 12:17:29
It worked well as expected. I lifted two pins and changed the configuration to speed up the sampling rate from 10 SPS to 80 SPS as it is described in the datasheet, and it worked nicely with higher sampling ratio. I am satisfied with this product.
Edmo
2025-03-18 15:58:58
Works great, I was able to put angle headers on and hot glued the leads as strain reliefs.
Dave S.
2025-02-10 09:33:36
There is no power supply ground pin on the IC chip according to the manufacturer's datasheet. However, their reference design shows tying power supply ground (from the digital interface's ground pin) to the analog ground pin on the chip. This can easily be done by tying the GND pin on the 4-pin header to the E- pin on the other header. Doing so makes the readings much more stable, and the digital interface much more reliable. Other HX711 board designs online make this connection.
Thomas
2025-01-23 12:10:58
it works, as expected. be careful to not get gnd and VCC flipped or you will fry the board.also pins on one side are short, making it a bit difficult to solder and get a good connection.
Bob
2025-01-16 13:19:07
I was sent these as a gift. Other HX711 boards I've used in the past had a simple solder pad that allowed operation between 10hz and 80hz.... this one does not. Its much more of a pita to setup for 80hz operation. You must first lift or cut the pad of pin 15, and then solder pin 15 to pin 16 See picture. I broke one of the two chips doing this, but luckily got the second one working. This chip is also pretty noisy. There are shielded HX711 boards on the market that are much less noisy for the same price.
boncontrols
2025-01-03 12:41:41
For the users out there scratching their heads why the output is drifting or gives errors, the PCB has a defect. The pin E- is not physically connected to GND. As a result the bridge E+ pin is not regulated and floats. The fix is to connect a wire from E- to GND and no more drifting. I wasted so much time on this and almost abandoned the project. Please fix the PCBs or at least put a warning about this defect so people would not waste any more time troubleshooting.
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