My goal is to reduce battery consumption of a op-amp to zero while a microchip sleeps.
Intend to do so with a transistor driven by a pin.
While sleeping, the chip would use little battery, and the op-amp would use none.
An interrupt would set the OPAMP pin as HIGH, which would allow the transistor to relay the power to the op-amp.
The PWM pin would do its thing, and get increase with the op-amp, and the resulting voltage would drive the speaker.
Once the chip is done with the sound, the chip sleeps and turns the OPAMP pin as LOW, stopping the use of the op-amp.
Here are my questions:
- Does the schematic make sense and am I hooking things the proper way?
- Is a pin's output stable enough to drive a op-amp with a transistor to save on battery?
- Would the added pin relay actually reduce significantly the op-amp's battery use?
- Is there a better way to amplify a sound while also reducing battery power?