Quote Originally Posted by menta View Post
btw, I've reached a point where my WW board is working, only when I use LONG wires to the external crystal.
I guess this cause some kind of induction which makes it do work.
I was using a very expensive wire (some kind of wire used in plans, teflon isolation, non melting) and it didn't work. Only when I used some simple 26 AWG wire it is working.
go figure.
Hi Menta,
every piece of wire, every component, every circuit board trace, exibits properties of both capacitance and inductance ( which means they act to some degree as both a capacitor and a coil ). The Oscillator in the PIC requires just a certain amount of each, or it will not work. When you use a crystal, you must use the correct value capacitors in the circuit or again, it will not work.<br>
That said, imagine the long wires running parallel to one another. every mm of that wire adds capacitance to the circuit, probably why it works with the long wires and not the short ones. One big however is, the long wires also work as coils and will throw off the frequency of the Oscillator. So as Skimask pointed out, put in the capacitors, on very short wires and enjoy your success.