I am designing a pressure indicator with the accuracy better than 0.02% of FSR. Below is the attached circuit. Someone has to carefully check the complete circuit with selection of components. Need to alter the circuit with overvoltage, overcurrent, reverse battery protection, EMC, etc.
Need to alter battery indication circuit with protection which is connected to PIN A0 of micrcontroller and provide a logic for battery status.
Stability of constant current for piezo resistive pressure sensor.
Input Voltage: 24V DC or 9V Battery