You could connect mclr directly to +5 as well - it just has to be high or the pic will not run (ie, it is in a state of reset whenever low) Any resister below, say 470k ohm will work. You can use higher, but it won't make any significant difference on current draw, and capacitive effects of the circuit board start to make a difference in how fast the circuit is reset, wakes up, etc. The reason most people use a resistor is so that you can still ground the mclr without shorting the power supply to induce a reset. If you never plan on reset the circuit this way it's still a good idea to follow this practise, though you could just hook mclr directly to +5 and be fine. -Adam Ken Robertson wrote: > > Ahh, I guess I should get one then. :) Do the crystals have a particular > polarity? Ohh, and 20mhz, not 220. My error. > > Also, I noticed on the board that I am missing a resistor that connects +5v > to MCLR, that it another problem. What resistor should I use? I put a 22k > one there, but I guess now it isn't working because of that crystal. > > Thanks! > Ken > > ----- Original Message ----- > From: "Bob Blick" > To: > Sent: Tuesday, January 23, 2001 8:46 AM > Subject: Re: (PIC): Possible miswiring of my board... input please? > > > > website/catalog just says "Series" in the impedance column. > > > > Bingo. You want "parallel" crystals for the PIC. > > > > -Bob > > > > -- > > http://www.piclist.com hint: The list server can filter out subtopics > > (like ads or off topics) for you. See http://www.piclist.com/#topics > > > > > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics