Quote Originally Posted by Rob View Post
I have used both values without problems although I normally use 10k.



It really does depend on what the input to the PIC is coming from although, generally, it is best to use a pull-down resistor otherwise it mght be left 'floating'.
The signal is 5V output from another PIC16F684 (on the same power supply).

again, depends on what it is being connected to. Some times it is necessary to use a capacitor to reduce noise etc



I'm assuming the capacitor was placed across the power supply of a voltage regulator. This is common practice and helps "smooth" the voltage. If I'm using a 5V regulator, I normally have a 47uF or 100uF across the input to the regulator and 10uF on the output of the regulator. Normally, I have 100nF capacitors across both input and output of the regulator in addition to the 47/100uF and 10uF caps. Some may say that this is unneccessary with todays voltage regs. Have a look at the specific voltage regulator data sheet; it may suggest different values.
It is between the anode and the cathode of the battery...

Hope this helps

Rob