Arduino Hx711 Weight Scale Interface 1 0 Software

This Instructable describes how to make a small weighing scale using readily available off the shelf parts. Materials needed: 1. Arduino - this design uses a standard Arduino Uno, other Arduino versions or clones should work also 2. HX711 on breakout board - This microchip is specially made for amplifying the signals from load cells and reporting them to another mircocontroller. The load cells plug into this board, and this board tells the Arduino what the load cells measure. 5kg load cell - Load cells are specially shaped metal parts that have strain gauges glue to them. The strain gauges are resistors that change their resitance when they are bent.

When the metal part bends, the resistance of the load cell changes (the HX711 measures this small change in resistance accurately). You can buy both the HX711 and load cell here: If you do purchase the kit please leave a review! It is really helpful for future buyers. Sturdy flat mounting surface (x2) - a stiff piece of hardwood or metal is ideal. Wires in various colors for connecting all the parts 6.

Transducer, both HX711 and the transducer will be powered down. When PD_SCK returns to low, chip will reset and enter normal operation mode. After a reset or power-down event, input selection is default to Channel A with a gain of 128. Application Example Fig.1 is a typical weigh scale application using HX711. It uses on-chip oscillator (XI=0.

Power supply for Arduino. Ratchet ekonomicheskoj effektivnosti proekta excel. First we are going to mount the load cell. Your mount will be unique, but here are the guidelines you need to follow: 1. The aluminum load cell should have 4 tapped holes and a label showing the direction of force.Mount the side without the label to the fixed surface and mount the side with the label to the moving surface.

The arrow on the labeled side should point down in the direction the platform will move when a load is applied. The mounting plate and the moving plate should both be as rigid as possible 3. Make sure to put some form of rigid spacers between the mounting plates and the load cell. Standoffs or washers both work well. The goal is that any force applied to the moving plate causes the load cell to bend and twist. Without spacers, load would be transferred directly from the moving plate to the fixed plate without affecting the load cell. This type of load cell should only be used to measure force in the direction of the arrow on the front, but you could definitely flip it over to measure a pulling force.

This would only really be good for a permanently mounted scale since the force is on a cantilever. If you want to measure pulling force with a handheld device, you could follow most of the instructions but use 'S type' load cell (this would be very accurate. You could also buy a cheap digital luggage scale and remove the load cell.

I am working on an application where i need to convert the weight of a person to calculate and use it for other parameter. So i started searching the internet and found many tutorials using the load cell and arduino. I started by opening up a bathroom scale and using the sensors available in it. It turned out after trying with the AD620 insrumentation amplifier that i was not getting linear results and the readings were not accurate so i decided to use HX711 instead. Also the code provided displays the weight in KG and can measure upto 120KGs. I am publishing this instructable so it helps someone like me to make their project faster. So the sensor gives the analog voltage as an output to the arduino but the voltage level is too small to be detected by the adc of the arduino and needs to be amplified using instrumentation amplifiers like AD620 or INA125.

Also the ADC on the arduino is 10 bit which provides a maximum of 2^10 ie. 1024 readings compared to HX711 which is 24 bit ADC and easy to interface. The Hx711 uses SPI interface to communiacate to the Arduino.

(Refer Data sheet for more info) More info on Connecting to Arduino Connection is pretty simple. Connect the wires from the load sensors E+ E- on the terminals of the sensor 2. Connect the S+ and S- wires on the A+and A- terminals respectively. Connect Vcc and Gnd 4. Connect the Dt terminal to A1 and Sck terminal to A0 (can be changed according to code).

Hey guys, i'm doing a balance system with 4 balances to do a mass balance in a race car (a project of my university). I did all, but the balances display a wrong result. I calibrated the system (individualy) but when i put a 5kg mass in the balance (used to calibration) all display the same value, but if i mount in the balances, one same more and one same less. I don't know what's happening, could it be the cables? (i need a long cable) I'm sorry for my bad english, i'm brazilian. Please Help me!

I have made same kind of circuit but I am getting a problem in amplifying the voltage. I have tried this with a 3 wired load sensor in which I am keeping 2 resistors on the breadboard and 2 wires (black and white) coming out of load sensor are connected to make a Wheatstone bridge and I am reading the value of voltage between red wire of load sensor and its other end in Wheatstone bridge. Now when I am applying force on load sensor then it's value are changing ( very minute change but still change I have to amplify that).