Post by thread:[Re: Strange PIC 16F84 I/O problem...]

Thanks everybody!!! Serial resistor actually solved the problem...I know that a latch up could occur (I had a similar problem with an opamp) but after I turn off the power it should go away...I still do not understand why there is permanent latchup.. Cap. is 0.1 uF and a quick calculation shows that when it is shorted it dumps a few 100 mA for a microsecond to the PIC...which way to high... Meric "Dr. Imre Bartfai" <spam_OUTrootTakeThisOuTPROF.PMMF.HU> wrote: Hi, I suggest you put some serial resistor between C and PIC as high discharge current can cause latch-up. (As a thumb of rule, about 200-250 ohms should do.) Regards, Imre ____________________________________________________________________ Get free email and a permanent address at http://www.netaddress.com/?N=1