Use the speaker (& case) from an old cellphone? RP On Wed, 24 Oct 2018 at 20:54, Art wrote: > Hi All, > > I have a 12F1840 that will put out various frequency tones when > complete, square waves with a 2N3904 amplifier transistor with Vcc of > 4.5 VDC. > > I need a nearly microscopic speaker of some sort that will put out > enough noise to be heard easily. Cellphones have microscopic speakers > and put out enough volume when used in speakerphone mode, so I didn't > worry about sourcing a speaker for my project. However, I now realize > that I can't locate one of these beasts. > > I don't need high fidelity sound, but I need something loud enough to be > heard in the next room at least well enough to alert me that the 12F1840 > has been activated. > > Budget is almost nil. Size is as small as possible, 8mm by 8mm by 3mm > would fit in my enclosure. I can go a bit larger than that with a PCB > redesign. > > Any suggestions? > > TIA. > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .