LOAD CELL FORCE SENSOR INSTRUMENTATION AMPLIFIER -analog output
Here is my newly developed Load Cell amplifier circuit. Circuit provides very accurate reading. I have tested this circuit with 5Kg Load Sensor. Output is almost 0 to 5V / 0 to 5Kg. Circuit is based on INA326 Instrumentational Amplifier. Gain is set 500, circuit works with 5V DC input.
The INA326 is high-performance, low-cost, precision instrumentation amplifiers with rail-to-rail input and output. They are true single-supply instrumentation amplifiers with very low DC errors and input common-mode ranges that extends beyond the positive and negative rails. These features make them suitable for applications ranging from general-purpose to high-accuracy.
- Power Supply Pin 8 VCC (5V DC) and Pin 9 GND
- Pin 2 and Pin 2 Sensor
- Pin 5 and Pin 7 Sensor Analog Output
Load Cell Sensor Connections
- Green Wire >>> VI+ CN1 Pin 7
- White Wire >>> VI- CN1 Pin 8
- Red Wire 5V DC
- Black Wire GND
Note : Sensor 2 Wire required 5V DC Separately.