PicoMite: driving a passive buzzer

Author	Message
thwill Guru Joined: 16/09/2019 Location: United Kingdom Posts: 4216	Posted: 11:31pm 28 Nov 2022       OK, so they are active buzzers and they work fine (with PWM) using Volhout's circuit from above with the PN2222 swapped out with the BC547s that I have. I even played a 2-channel version of "The Entertainer" on a pair of them using the PWM command, it was an experience not to be forgotten . But I get Sweet FA (with or without the low pass filter from the PicoMite manual) if I use the same setup with OPTION AUDIO, and PLAY TONE or PLAY SOUND. What detail am I failing to grasp ? Edit: I'm guessing it is something to do with the phrase in the manual "...  relies on capacitor coupling into the following amplifier ..." Best wishes, Tom Edited 2022-11-29 10:03 by thwill