On Fri, 13 Oct 2000, David VanHorn wrote: > The easy way is with an op-amp. Some mics require a DC voltage to operate, > but you can get that easily. Is this a good solution for low power apps, like battery powered where the PIC will sleep until some time, wake up to check timers and input pins, then sleep again? -- Ian -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu