oops hit send just as I noticed I said 'speaker' when I meant 'piezo'. Note that many of these aren't flat on frequency response (see the graph in the image I linked), but they're perfectly servicable as a beeper/buzzer as long as you know that some frequencies are better than others. On Wed, Oct 24, 2018 at 2:43 AM Forrest Christian (List Account) < lists@packetflux.com> wrote: > Maybe one of these: > > https://www.allelectronics.com/item/pe-52/mini-tone-transducer/1.html > > [image: image.png] > > I think the term you're looking at is 'transducer' or 'speaker'. All > electronics have quite a few on their website, that's just the first one = I > found. > > > On Wed, Oct 24, 2018 at 2:04 AM 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 >> > > > -- > *Forrest Christian* *CEO**, PacketFlux Technologies, Inc.* > Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 > forrestc@imach.com | http://www.packetflux.com > > > > --=20 *Forrest Christian* *CEO**, PacketFlux Technologies, Inc.* Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 forrestc@imach.com | http://www.packetflux.com --=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 .