I have a portion of my small battery powered project where I have a small vibrator motor. As you can see in the schematic the input signal from a 3.3V PIC32 goes into the INPUT pin on a analog switch. When this signal is high the switch connects 3.3V to the vibrator motor and when it is low it will connect to ground.
When the device is booting up or if the battery voltage drops too low and the micro controller is shut down the vibrator motor will activate. This could be a good thing to indicate bad batteries but it is annoying when programming and booting up which in my mind outweighs any benefit from a low battery indicator.
I was wondering if there was a simple circuitry fix to add in if the micro controller shuts down, maybe a pull down resistor on the vibrate line?
Also the vibrate control line goes directly to the PIC I/O pin.
When the device is booting up or if the battery voltage drops too low and the micro controller is shut down the vibrator motor will activate. This could be a good thing to indicate bad batteries but it is annoying when programming and booting up which in my mind outweighs any benefit from a low battery indicator.
I was wondering if there was a simple circuitry fix to add in if the micro controller shuts down, maybe a pull down resistor on the vibrate line?
Also the vibrate control line goes directly to the PIC I/O pin.
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