PCB Design Method and Software
 
- By GRAIG

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Method:

How to make PCBs with a laser printer

First thing to do is make a schematic in any Layout editor. Once you have done this you can then design the layout using layout editor too. Making schematic first helps because Layout editor will show you clearly if make any mistakes with the PCB.
Here is an example


Print it out onto some semi glossy photo paper. Be sure to select “solid black” in the Layout editor printing preferences and also unselect silk screen layers so that you only see pads and traces: 

 
Then quickly take this paper, cut out your design and place it face down onto some blank PCB board. If you don’t do it quickly, the ink won’t stick. Then use an iron and press the design on to the board. Use A LOT of pressure and ensure all parts of the design make good contact with the blank PCB. Keep it pressed for at least 15 mins. I have found that having steam on/off makes no difference. Then take your blank PCB with the design stuck on to it and soak it in soapy water for about 20 mins to loosen the paper.
 
 

Then CAREFULLY remove the paper. Be sure not to remove any of the black ink traces because these are what stops the acid in the etching process. We use a kind of rubbing motion to remove the paper. Keep it wet all the time so that it seoarates easily from the copper board. If any black ink black ink traces are removed or not properly stick on copper clad , then u can permanent marker to give final touch-ups.
Done and ready for etching:
 
Get some etchant and just follow the instructions for the dilution level. We just use a FeCl3 solution and a glass bowl.
Add boiling water from a jug:
And slowly swirl or rock the bowl around. The liquid must be always moving over the copper board to get it to etch properly.


Done!



Now scrub the black ink off the PCB and voila, you have a custom designed PCB:



Then all you need to do is drill out the holes by a hand drill and start mounting the components:



It will take maybe a couple of tries to get the hang of it but once you’ve got it you can produce perfect PCBs every time



Note:

· You can’t do it with Inkjet printers, the ink doesn’t stick.

· OKI LED and regular laser printers work well.

· We have only used glossy paper and have always had perfect results, although matt photo also works.

· Once the design is stuck to the PCB put a blank piece of paper over the design and then rub and twist the iron while pressing the print on the PCB. This gives better coverage and makes sure it sticks on all parts of the PCB. 

 

SOFTWARE: 


PCB123 and Eagle



These are free PCB design softwares using which you can prepare professional looking PCB’s.

It includes:

· PCB Layout — PCB design with an easy to use manual routing tools, auto-router and auto placer.

· Schematic — Schematic Capture and export to PCB or Spice.

· Pattern Editor — allows you to create part footprints.

· Component Editor — allows you to draw parts and make components.







If you want these software’s setup files please let us know that. You can mail us
teesakatta@gmail.com or contact us.Sends us a mail and immediately we will mail u setup files.
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