Strain Gauge Load Cell Arduino

The white connectors on the board are 4 pin molex connectors with 0 1 spacing.

Strain gauge load cell arduino.

The ground of the hx711 is connected with the arduino s ground. Load cells usually has four strain gauges hooked up in a wheatstone bridge formation which have four output wires. The white wire will be connected with the a pin of the hx711 while the green wire of the load cell or strain gauge is connected with the a of the hx711. Stack the load cell amplifier shield on top of the arduino board in our case a lynxmotion botboarduino.

When a single strain gauge is hooked up to a metallic cell we are calling that a load sensors which have three output wires. A 24 bit analog to digital converter called the hx711 converts the small changes in strain from the load cell into 24 bit changes in voltage arduino 0 5v. The load cell wheatstone amplifier shield 2ch is intended for precise amplification of measurements specifically for bridge amplifiers medical instrumentation and industrial process control. On the right side of the hx711 breakout board the four terminals are clearly labeled with gnd dt sck and vcc.

Instrumentation signals for example from wheatstone bridge sensors are often in the order of mv millivolts or less and need to be amplified for. For more information on load cells strain gauges and wheatstone bridges see our tutorial. Electronic weighing machine uses load cell to measure the load or pressure produced by the load here most load cells are follows the method of strain gauge which converts the pressure force into an electrical signal these load cells have four strain gauges that are hooked up in a wheatstone bridge formation. This allows the arduino to resolve weight mass changes down to the range of the load cell typically 500g 1kg 5kg or more divided by half the bit depth 2 23.