Suggestions:  Our class found that Yanka was Idea for creating PCB Board Layouts.  Yanka allows a user to print off a bill of materials. (It includes English Pricing)

Open Yanka, use PCB with Electronics

Design a Circuit!

Copy and Past into Rectangular PCB Space

Click on the second icon on the top right!

Print the Bill of Materials Make changes (such as 386 for 555)

Click on the First icon on the top right!

Select Quick, To automatically create tracks

Select View

Select Display Artwork Print on transparency!

Explore Views like-> Real View

Materials  PCB boards  Yanka  Acetone  Magazine paper/ Laser Printer Transparencies  Laser Printer  Iron/ Press

Safety Instructions  Solutions used in etching are Corrosive Everyone must wear gloves and goggles when working with such chemicals We will not be using in this class Is not recommended for use at home

What to Etch?  Need to design a circuit schematic Wires will be the copper that is not etched tattoodonkey.com.jpg(Accessed October 12, 2011.)

Patterning PCB Boards STEP 1: Print schematic on magazine paper with a laser printer (Suggestion) Print on Laser printable Transparency STEP 2: Clean PCB board with a wire mesh pad and rinse with water

Patterning PCB Boards STEP 3: Iron the board 1 min and then on the design onto the PCB board for ~1 minute (Suggestion) Iron for up to five minutes Or press for a minute or two

Patterning PCB Boards STEP 4: Place the PCB into water and gently remove the magazine paper (Suggestion) Print on Laser printable Transparency using water to take off magazine paper is not needed. The print is transferred directly to the PCB Board.

Etching PCB Boards STEP 5: Use a black permanent marker to lay out any tracks that need protection STEP 6: Send to a lab and have the boards chemically etched.

Why Chemically Etch the Copper?  Able to form electrical connections between circuit components No external wires Continuous connections manufacturing/(Accessed October 12, 2011.)

Copper Cu  Very high thermal properties  Great electrical conductivity Great properties for charge carrier material in PCB!! (Accessed October 12, 2011.)