Hello,
I am an absolute beginner in electronics, and i need to assemble this load sensor into a machine.
I have a "HX760 electronic scale module" for which i could only find this information sheet: https://www.aliexpress.com/item/32345824047.html?gatewayAdapt=glo2bra
And a load sensor "DYHW-116", both have the pictures below.
I know the cables of the load cell, red&black for excitation and white&green signal +-.
There are a lot of tutorials and information for the Module HX711 but barely any for mine which is different enough for me to not know how to proceed. Also the material is not mine, and i am afraid to burn/break something.
I just want to know if i can use these two components together and how to connect them properly.
Also, a few other questions to add up:
Must i use a 24V power supply to the module or can i use less (for example the 5V from Arduino)?
If i use 24V will it harm/burn/break the Arduino?
Do i need to connect both grounds? (the board has 2 ground close to each other)
No, yes, and no. Look at the datasheet in your Ali link for the operating voltage range.
No, because the Arduino will be using the 4-20mA loop and won't "see" 24 volts. Google Arduino 4-20mA for methods. If you include wawa as a search term, you will get good advice (from @Wawa ... a frequent contributor here).
But using 24 volts may harm the load cell if the board outputs an excitation voltage of 24 volts. Look at the load cell datasheet for maximum excitation voltage and measure the board's excitation voltage.
And, note the board has a maximum differential input of 20 mV. Even if the load cell can take 24v excitation, it may output more than 20 mV under full load (but if you aren't using the full capacity, it may be ok). You can calculate the full load output using the load cell "sensitivity" and excitation voltage. Google load cell sensitivity mV/V.
Why don't you look at the PCB board? I bet you will see that they are already connected to each other.
Edit to add:
But unless someone is forcing you at gunpoint to use that board, or unless there are good reasons to use the 4-20mA approach (industrial environment, say), or if you live on Mars or somewhere else without mail service, then you really ought to consider using an HX711.
