PicoMite: driving a passive buzzer

Author	Message
thwill Guru Joined: 16/09/2019 Location: United Kingdom Posts: 4334	Posted: 11:11pm 15 Dec 2022         Volhout said   No inductors, try this .... My 4.7nF capacitors and an ~1.5cm 8 ohm speaker finally turned up so I was able to build @Volhout's inductor free circuit from a couple of pages back (using a 47 ohm resistor I had in stock rather than the 33 ohm specified). It sounds good (not that I can necessarily tell as I appear to be on the path to deafness), but it is very quiet, and will presumably get worse when I am running it from a 3.7V LiPo rather than 4.8ish V USB? Is this just "life" with a small speaker and no enclosure/cone or is there something I can do? Note that I only have room for a single speaker. Thanks in advance, Tom Edited 2022-12-16 09:12 by thwill