At 09:50 PM 6/8/02 +0200, Arkady Skorokhod wrote: >1. PIC is used to produce voltage level by means of PWM. >So, one pin configured as out is connected to an in-pin of an op-amp >arranged as an active low-pass filter. The op_amp (AD711 in this case) is >powered from +/-15V rails. > >2. 8 out-pins of a PIC are connected to digital inputs of a DAC (AD7524). >The DAC is powered from +15V. > >The question in both cases: Is it OK (= safe for the PIC)? If not, how >should I arrange these connections? Should be fine! Think of it this way: the PIC is sending the signal, not receiving it. So long as the intended load can accept the voltage the PIC supplies, everything is OK. dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 18 years of Engineering Innovation (1984 - 2002) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body