WEEK 3

Title of the activity: Etching the circuit for the project       


           After the schematic diagram of the circuit was designed by using Diptrace software, the etching of the PCB board can be proceeded. The method that chosen to do the etching by using the iron. After the track of the circuit was printed on transparent plastic, the track of the circuit need to transfer to the PCB board. Hence, the plastic need to be ironed together with the PCB board. Then, for four more minutes, slowly move the iron around making sure to put a lot of pressure on the plastic, but not allowing the plastic to slide on the board. When done, let the board fully cool before moved it at all. This will allow the toner to adhere to the copper and prevent you from being burned.

          In a well-ventilated area with a fan, add 2-cups hydrogen peroxide to a plastic container. Gently pour in 1-cup Muriatic acid, to create the etching solution. Always wear goggles, gloves, and do not inhale the fumes. Do not use any metal containers, measuring cups, stainless steel sinks, or tools with this mixture as this mixture will aggressively etch metal. Acid safety, think “triple A”, for Always Add the Acid, it’s whatever is in the container that will end up splashing. This etching solution, while made with common chemicals, should command respect. It is dangerous to yourself and surroundings, treat it with respect. Ferric chloride is another common etching solution, it is not a safer solution to use, both are equally dangerous.

Below is picture of the process for etching:

Redo the copper line by using permanent marker

                                                             Etching the circuit board