What is a PCB?
From the term PCB, we mean Printed Circuit Boards which are used to maintain circuit in TV, computer and other electronic devices. PCB is the best way to avoid the risk of any circuit failure and loose connections. It is very cost friendly and one can safeguard very complex kind of circuits with in a confined space with copper tracks that are made to interconnect the connections with each other.
Though the industrial procedure of making a PCB is quite complex and expensive machinery is required to make it on larger extent but for the ease of users here we are going to elaborate a simple and concise method of developing PCB at home.
Before discussing the method of making a PCB, we will tell our readers that PCB can be made through two basic methods, let us go through them briefly;
Two Methods to Make PCB
1.Glossy paper Method.
2.Making circuit by hand on PCB.
3.Copper covered cover
Basic Steps before Making a PCB
1.Make a print out of PCB layout with the help of laser and glossed paper and make the print out on glossy side of paper.
2.Cut the board covered with copper equivalent in size of layout.
3.Use a sponge scrub to smoothen the copper sides of PCB.
4.Shift the PCB print to the copper plate.
Glossy Paper Method
1.Shift the image on the photo paper to the board by placing the copper surface on the printed layout.
2.Use tape to fix the board and printed paper accurately on their allocated positions.
Hand –Made Circuit on PCB
► Draw a rough sketch on the copper plate with lead pencil and later trace it with the help of marker.
► Iron the circuit on the PCB plate with the image towards the copper side.
► With the help of pliers hold the one end and put hot iron on the other end and continue to iron the whole paper with some pressure.
► Iron heat will make the ink to print the image on the copper plate from the glossy paper.
► Once ironing is done, place the printed plate in lukewarm water, you will see the paper dissolving into water.
► Remove the paper gently.
► Now comes the time to etch the plate which requires much care.
► Dissolve 2 to 3 teaspoons full of Ferric Chloride powder in water and dip the PCB into the solution for 30 minutes.
► FeCl3 reacts with copper and unwanted copper gets removed from PCB.
Cu +FeCl3 = CuCl3 + Fe
► Wait for two minutes till whole copper is removed.
► Last but not the least came the final steps of disposing off the adhesive solution as it is quite destructive in its pure form so better to dispose of it after diluting the solution with water.
► Use thinner to get rid of excessive ink on the plate exposing copper surface.
► Make holes with the help of drill and fix all the components to the board.
► For a typical green look, use solder resistant paint on the PCB lacquer.
Your home made PCB is ready to fix and install in any place of requirement.
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