Ina125p is a mid to high end analog instrumentation amplifier while hx711 is a strain gage load cell digital interface ic purposely made for consumer electronic let me say it s made to equip the standard kitchen scale or person weighing scale everyone has at home.
Load cell amplifier ic.
The filtering capacitor is highlighted in the color black between the two signal lines s and s.
The pin 5 can be used to adjust the output to be within this range if driven from an zero ohm source.
By connecting the amplifier to your microcontroller you will be able to read the changes in the resistance of the load cell and with some calibration you ll be able to get very accurate weight measurements.
The hx711 load cell amplifier is used to get measurable data out from a load cell and strain gauge.
Here the two scheme diagram of load cell amplifier circuit.
Load cells connected to combinator and hx711 amplifier this is the same layout that you would find in say your home scale.
A load cell signal conditioner is an integral component of any weighing system.
Let s go for pros and cons.
Load cell amplifier our intelligent strain gauge bridge amplifier is a compact stackable microprocessor based unit specifically designed to control and monitor process applications.
Reference circuit for the hx711 a common load cell amplifier ic referring to figure 5 above for the commonly used hx711 load cell amplifier the filtering capacitor is placed in between the two wires carrying the output signal.
It is very easy to be embedded into industrial devices.
The 100 ppm k gain drift of the circuit will make a 0 01kg drift for a 100kg bed and patient if the temperature changes 1 k.
Integrated design small size easy to use.
Let me say that they are two different things.
Load amplifiers increase the signal generated by strain gauge sensors and allow for further processing and monitoring.
I ve found some interesting schematic of load cell amplifier.
It accepts 20mv differential signal input and converts it into 4 20ma and 0 10v output in linearity.
The sparkfun load cell amplifier is a small breakout board for the hx711 ic that allows you to easily read load cells to measure weight.
Brt hx760 load cell amplifier circuit is a very simple low cost weight sensor signal conditioning circuit module.
Load cell amplifier using amp04.
The faa family is ideally suited for applications in the process weighing and process automation sectors.
There would be four single strain gauge load cells hooked up to a combinator and an amplifier to give you your weight reading.
Real scale instruments for load cells are often less than 2 ppm k.
As we know load cell amplifier is pretty expensive with fair price range of 100 300 usd.
