"Differential Drive" for a Buzzer using tone()

General
1

Hi there!
I will like to add a buzzer to a Photon device and I’m wondering if there’s an elegant way of “differential drive” it using tone().

Thank you for your help

2

The STM32F205 processor has complementary PWM outputs, however there's no exposed pair of pins that makes it possible to use, as is.

It is possible to do some low-level software hacking and use two timers, one in complementary mode, to accomplish this, as one user did here:

I don't think it qualifies as elegant, however.

1 Like
3

Thank you @rickkas7 for your swift reply.