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HX711 Module + 20kg Aluminum Alloy Scale Weighing Sensor Load Cell Kit

4.8490

$13.99 / $17.07

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$1.50 / $17.07

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Parameter:

Comprehensive error: 0.05% F.S
Rated output temperature drift: ≤ 0.15% F.S / 10 ℃
Output Sensitivity: 1.0 ± 0.1 mV / V
Zero drift: 0.05% F.S (1 minute)
Zero point temperature drift: 0.2% F.S / 10 ° C
Zero output: ± 0.1 mV / V
Input impedance: 1000 ± 50Ω
Output impedance: 1000 ± 50Ω
Overload capacity: 150% F.S
Recommended excitation voltage: 5-10V
Operating temperature range: -10 ~ +50 ℃
Application: for high-precision small-scale weighing for micro-automatic testing equipment, micro-weighing equipment, pushing and pulling equipment, pull pressure test
Red: E +
Black: E-
White: A-
Green: A +

Package included:

1 x Weighing Sensor Load Cell
1 x HX711 Module

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HX711 Module + 20kg Aluminum Alloy Scale Weighing Sensor Load Cell Kit

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Show Original

A part of the review has been auto-translated.

fuiru VIP3
US

01/08/2018

I was able to get this working very quickly, but the values coming from the HX711, with no load on the bar, kept drifting very significantly.

After a long troubleshooting session, I found out that the HX711 print has a major design flaw. They forgot to connect the AGND pin of the HX711 to GND, so it's just floating in the air, explaining the drifting. This can be fixed by soldering a wire between the GND pin on one connector and the E- pin on the other side. I found the exact same board on a different site with a picture of the schematics. This confirms that AGND is not connected to GND. See attached picture.

It's also important to note that the print is designed to be supplied with 5V, even though the HX711 is specified to work down to 2.6V. The internal voltage regulator on the HX711 is configured with R12 and R13 to produce 4.2V across the sensor (E+ and E-). Considering the drop across the transistor, the supply voltage needs to be about 4.5V (or up to 5.5V), otherwise the regulator can't do its job. If a 3.3V supply is provided, the resistors can be changed accordingly. If you use it as is on 3.3V, be aware that the built-in regulator will not be able to do its job, so any ripple on the supply voltage will influence the measurement.

I was able to get this working very quickly, but the values coming from the HX711, with no load on the bar, kept drifting very significantly.

After a long troubleshooting session, I found out that the HX711 print has a major design flaw. They forgot to connect the AGND pin of the HX711 to GND, so it's just floating in the air, explaining the drifting. This can be fixed by soldering a wire between the GND pin on one connector and the E- pin on the other side. I found the exact same board on a different site with a picture of the schematics. This confirms that AGND is not connected to GND. See attached picture.

It's also important to note that the print is designed to be supplied with 5V, even though the HX711 is specified to work down to 2.6V. The internal voltage regulator on the HX711 is configured with R12 and R13 to produce 4.2V across the sensor (E+ and E-). Considering the drop across the transistor, the supply voltage needs to be about 4.5V (or up to 5.5V), otherwise the regulator can't do its job. If a 3.3V supply is provided, the resistors can be changed accordingly. If you use it as is on 3.3V, be aware that the built-in regulator will not be able to do its job, so any ripple on the supply voltage will influence the measurement.

I was able to get this working very quickly, but the values coming from the HX711, with no load on the bar, kept drifting very significantly.

After a long troubleshooting session, I found out that the HX711 print has a major design flaw. They forgot to connect the AGND pin of the HX711 to GND, so it's just floating in the air, explaining the drifting. This can be fixed by soldering a wire between the GND pin on one connector and the E- pin on the other side. I found the exact same board on a different site with a picture of the schematics. This confirms that AGND is not connected to GND. See attached picture.

It's also important to note that the print is designed to be supplied with 5V, even though the HX711 is specified to work down to 2.6V. The internal voltage regulator on the HX711 is configured with R12 and R13 to produce 4.2V across the sensor (E+ and E-). Considering the drop across the transistor, the supply voltage needs to be about 4.5V (or up to 5.5V), otherwise the regulator can't do its job. If a 3.3V supply is provided, the resistors can be changed accordingly. If you use it as is on 3.3V, be aware that the built-in regulator will not be able to do its job, so any ripple on the supply voltage will influence the measurement.

12

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uhm VIP3
DK
28/02/2019

Tested on a Professional instrument, and accuracy is within +- 5%, acceptable for this price.

Tested on a Professional instrument, and accuracy is within +- 5%, acceptable for this price.

Tested on a Professional instrument, and accuracy is within +- 5%, acceptable for this price.
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Q:
How many readings can this take per second?

How many readings can this take per second?
How many readings can this take per second?

A:

10hz . but soldering off pin 15 from ground to VCC, so the rate go to 80Hz, then the read is no more freezing

10hz . but soldering off pin 15 from ground to VCC, so the rate go to 80Hz, then the read is no more freezing

Answered by Fredlepp on 12/01/2021Helpful (0)
0

Q:
if I use 4 of these load cells, can I use only one board or I need 4 boards to connect it to an arduino?

if I use 4 of these load cells, can I use only one board or I need 4 boards to connect it to an arduino?
if I use 4 of these load cells, can I use only one board or I need 4 boards to connect it to an arduino?

A:

You should be able to use only one HX711 amplifier with 4 load cells. Just make sure to connect them in parallel. Combine all similar coloured wires together and then feed them into the HX711.

You should be able to use only one HX711 amplifier with 4 load cells. Just make sure to connect them in parallel. Combine all similar coloured wires together and then feed them into the HX711.

Answered by jfjoubert on 22/01/2019Helpful (0)
0

Q:
why we divide by 106 in the code ?

why we divide by 106 in the code ?
why we divide by 106 in the code ?

A:

i really do not know. i buyed the transducer but i have not used yet. i hope some else can answer you!

i really do not know. i buyed the transducer but i have not used yet. i hope some else can answer you!

Answered by zolatanaffa on 08/06/2020Helpful (0)
0

Q:
I want to built a scale but I need all information or a complet kit. 20 kg load cell hx711 ad module lcd monitor ??? power supply ??? wirering schema ???. thank you

I want to built a scale but I need all information or a complet kit. 20 kg load cell hx711 ad module lcd monitor ??? power supply ??? wirering schema ???. thank you
I want to built a scale but I need all information or a complet kit. 20 kg load cell hx711 ad module lcd monitor ??? power supply ??? wirering schema ???. thank you

A:

Sorry, we don't know what the model you want to build for a specific learning kit.Maybe you can consult on the relevant forum.

Sorry, we don't know what the model you want to build for a specific learning kit.Maybe you can consult on the relevant forum.

Answered by wujiahui on 30/12/2018Helpful (0)
0

Q:
Is this sensor linear? Also, what is the thread size for the holes?

Is this sensor linear? Also, what is the thread size for the holes?
Is this sensor linear? Also, what is the thread size for the holes?

A:

Yeah,this is sensor linear,the thread size is 15mm.

Yeah,this is sensor linear,the thread size is 15mm.

Answered by wujiahui on 13/11/2018Helpful (0)
0

Q:
how can I connect multiple loadcell to share the same load? I need to measure the weight change of some frame which is 2meter long, so putting such small loadcell is effecting the balance, can I add 2 sensors on both end of the frame and connect to one board and take single measurement?

how can I connect multiple loadcell to share the same load? I need to measure the weight change of some frame which is 2meter long, so putting such small loadcell is effecting the balance, can I add 2 sensors on both end of the frame and connect to one board and take single measurement?
how can I connect multiple loadcell to share the same load? I need to measure the weight change of some frame which is 2meter long, so putting such small loadcell is effecting the balance, can I add 2 sensors on both end of the frame and connect to one board and take single measurement?

A:

Sorry, we have not tried this situation, it may be feasible. The three added numbers are.

Sorry, we have not tried this situation, it may be feasible. The three added numbers are.

Answered by wujiahui on 13/11/2018Helpful (0)
0

Q:
Hello Team, Need your team support. Please find my requirement details for your reference. Load cell can able to measure for 100Kg. With Bluetooth option. Suitable for Arduino Boards. If suitable modules are available, please share the details. Regards, Surya prakash

Hello Team, Need your team support. Please find my requirement details for your reference. Load cell can able to measure for 100Kg. With Bluetooth option. Suitable for Arduino Boards. If suitable modules are available, please share the details. Regards, Surya prakash
Hello Team, Need your team support. Please find my requirement details for your reference. Load cell can able to measure for 100Kg. With Bluetooth option. Suitable for Arduino Boards. If suitable modules are available, please share the details. Regards, Surya prakash

A:

Do not have this product.

Do not have this product.

Answered by Jonnie on 03/07/2018Helpful (0)
0

Q:
library for scale weight

library for scale weight
library for scale weight

A:

you can google for it

you can google for it

Answered by Cream5 on 30/11/2017Helpful (0)