/diy/ - Do It Yourself

Anonymous Sun May 24 13:59:53 2020 No.1828194 [View]
File: 12 KB, 464x330, opamp.png [View same] [iqdb] [saucenao] [google]

I need help with op amps.
On input I have AC signal in range -100mV to 100mV. How do I offset that to a 0.5V - 2.5 but using single supply op amp? Rest of the circuit is supplied by 3V so op amp would also be supplied by 3V. Signal frequency is under 1KHz.

Input comes from piezo sensor, for vibration sensing so it has to be non-inverting op-amp because in datasheet it said the sensor prefers 1MOhm+ impedance on input.

All tutorials and schematics I've found are doing it easily but with +5V -5V supply, which I don't have in this circuit.
Or they have single supply op amp config but their input signal is also offseted.

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