Hi everyone,
I have recently been asked to carry on a project which the original circuit designer had to leave (due to ill health). My task is to take the schematic and create a very small (fit in a pen size) circuit board. Im using a pic 18f2550 (or an 18f4550... making two to test which is most effective), and using a clock speed of 24MHz. We are going to be sending the board out to be made, so everything will need to conform to conventions. I have never actually designed a board like this before (all of my previous ones have been fairly basic pic boards with no need to consider space/EMC/conventions. And likewise i have never been taught about them.
I would be really appreciative if someone could give me some basic pointers on:
a) How to avoid EMC problems... should i thicken up certain ground tracks/avoid making loops etc?
b) Are there any conventions that need to be used for symbols etc? i have a diode silkscreen symbol, but have no idea which way round the anode or cathode is .
Any help/advice about surface mounting in general would be greatly appreciated.
kind regards
Fergus
I have recently been asked to carry on a project which the original circuit designer had to leave (due to ill health). My task is to take the schematic and create a very small (fit in a pen size) circuit board. Im using a pic 18f2550 (or an 18f4550... making two to test which is most effective), and using a clock speed of 24MHz. We are going to be sending the board out to be made, so everything will need to conform to conventions. I have never actually designed a board like this before (all of my previous ones have been fairly basic pic boards with no need to consider space/EMC/conventions. And likewise i have never been taught about them.
I would be really appreciative if someone could give me some basic pointers on:
a) How to avoid EMC problems... should i thicken up certain ground tracks/avoid making loops etc?
b) Are there any conventions that need to be used for symbols etc? i have a diode silkscreen symbol, but have no idea which way round the anode or cathode is .
Any help/advice about surface mounting in general would be greatly appreciated.
kind regards
Fergus