Thanks. Not sure what the piezo draws. Less sure if it's relevant when the output is PWM because of less than always on duty cycle. Later I had this setup so I could send an email from my phone while away from the house to my laptop. Outlook rules would look for a keyword in the subject and run an external power shell script that would attach to the com port the arduino was on and send the message which would get flashed and beeped in morse. This would surprise my wife every time! It was funny.
Thanks. Not sure what the piezo draws. Less sure if it's relevant when the output is PWM because of less than always on duty cycle. Later I had this setup so I could send an email from my phone while away from the house to my laptop. Outlook rules would look for a keyword in the subject and run an external power shell script that would attach to the com port the arduino was on and send the message which would get flashed and beeped in morse. This would surprise my wife every time! It was funny.
freman448 1 year ago
Nice project. I also use resistance to protect Arduino PWM output, but according to the piezo buzzer documentation it is not needed.
mhary2 1 year ago
Comment removed
mhary2 1 year ago