Alright A little late but like I promised Here is the working completed PCB for a 3 Channel PWM controller. The file is a .PCB and can be opened with Circuit Maker 2000. the DEMO can be downloaded
HERE
Im not sure if this link is legal or not all I know is that it was at one time legal to download the 30 day trial for free from microcodes page. However they dont seem to have it on their page anymore since a release of a new software package.
The PCB can be downloaded
here
in a ZIP archive. If you have trouble opening the link try right clicking and save as, the service I am using for free hosting doesnt like direct linking.
You will also need
this kit
to make the board. The kit expects you to use the Sharpie as a etchant mask but what you will do is instead use circuit make 2000 to print out the PCB on a piece of paper. Copy and paste them (i should have done it for you) so you get more than one copy before printing. This is key in case you mess up on the following steps as a begginer probably would, as I did the first time I did it.
Once you have the image printed (I think I fit 4 to a sheet.) get it photocopied to a transparancie. Or If you have a LASER printer you can print it directly on a transparancy. It must be a LASER printer because of the heat transfer method used with the toner.
Next mesure and cut your circuit board to your desired size. It should fit just within a 5" drive bay if cut properly. Now use a one of those green dish washing pads. (a clean one
) to clean off the copper it will become nice and shiny. This is key for the ink to stick.
Now get an Clothes iron, an news paper and a clean sheet of printer paper.
set the Iron to Mid High heat and let it heat up.
Cut out one of the transparancy PCB templates for the controller. Look at both sides. The image on one side is shiny and the other is dull. The dull side is the side with the Ink on it. Keep it in mind.
Place the cut and cleaned ciruit board on the newspaper copper side up and place a piece of printer paper over it.
Now Iron it LOL for a couple minutes.
Take the paper off and get ready to put the transparancy on the copper INK SIDE DOWN. Align it by peering through the transparancy with the copper before placeing it down because when it comes in contact with the hot copper the ink will stick.
Place the blank paper on top of the board once again and then Iron it. Iron it for a good 20-30 Sec. Carefull though you dont want the plastic to melt or it will smudge the ink. Now quickly put down the Iron and SLOWLY and CAREFULY peel the plastic off the copper. It should leave behind the INK on the copper. If you feel up to it you can try peeling it as I do by keeping heat applied to it by pulling up on the transparancy and slowly moving the Iron across the paper with the transparancy as it comes off the copper board.
If you messed up let the board cool and re clean it and cut out a new template and start again.
If it looks decent let it cool, it doesnt have to be perfect as you can now use the marker to touch up and copper showing through the lines. Once ready follow the instructions in the Kit to etch the board in the solution.
I find that using a 50/50 mix of the Fehric Chloride and water works beautifully. Move the board around in the liquid exposing it to oxygen perioduclay (ever few seconds) the faster you can move the board the faster it will etch. Try not to spill the chemical as is stains and is corosive. (not that splashing it on my skin ever did anything but dont take the chance) I sugges reading the MSDS sheet for Fehric Chloride before using it. Once your finnished you can bottle the solution and save it for the future.
Next drill the hole for the components on your board. I belive the kit come with a bit. It is very small so be carefull not to break it. If the bit looks too big for the pads i suggest going to a surplus store (like princess auto if your in canada) and pick up a smaller one. A drill press or a dremmel drill press converter is highly recomended because if the bit is pressed at and angle it will break verry easily. Also dont force the bit, If you see it starting to bend your pressing too hard.
Good luck everyone!!!!