MAKE Your Own PCB: SINGLE SIDE COPPER BOARD PCB.
Select a suitable plain single side copper pcb, size to all the components for your circuit. If the copper clad board is large in size, cut it to the required size using a small Hacksaw frame. The copper plain board has a copper coated side which forms the soldering side. The other side is the component side on which the components are placed.
MATERIALS REQUIRED TO MAKE PCB.
- Trace Paper,
- Carbon Paper,
- Permanent Marker Pen,
- Ferric Chloride,
- Plastic Tray,
PCB COPPER BOARD:– First any dirt or copper oxide on the copper side, clean it using with thinner.
Simple variable power supply circuit is taken for pcb making.
PCB making Steps:-
- Draw the circuit diagram as compact as possible on a paper by free hand.
- Mark the points round than track size (as device pins) to be drilled.
- This diagram is used for Pattern drawing on the single side copper board.
- Draw the same diagram in the tracing paper using the permanent marker pen.
- Draw the diagram carefully without any overlapping or shorting of tracks or components.
- The neatness of the PCB lies in the Pattern drawing.
- After drawing, see the other side of the paper.
- There is a Mirror effect of the tracks. This is the actual pattern of the Pcb.
HOW TRANSFER DIAGRAM TO PCB.
Place the Pencil carbon on the copper side of the copper board. The ink side of the carbon paper should face the copper layer of copper board. Place the tracing paper with diagram over the carbon paper. The diagram should be in the middle part of the copper clad board. Fold the sides of the tracing and carbon papers and stick it using cello tape. This prevents the movement while drawing. Once again redraw the diagram using the marker pen so that the carbon ink will create a mirror sketch on the copper board.
Remove the tracing paper and carbon paper. Using the marker pen, redraw the carbon pattern of the mirror sketch on the copper laminate. So that the tracks will be created using the permanent marker ink. Keep it for some time to dry the ink.
How to Etching .
The solution FEERIC CHLORIDE is used to removes the unwanted copper layers from the copper board. The Etching solution can be prepared by dissolving 100 gms Ferric chloride powder in 200 ml warm water.
Take a Plastic or Porcelain tray and place the copper clad board with the track side facing upwards. Carefully the Ferric chloride solution over the copper clad till the copper clad immerse in the ferric chloride solution.
Keep the tray in sunlight and shake many times that time extra copper cleaned. Etching will be completed in one hours.
PCB drill is used to drill holes in the PCB, A hand drill with suitable small (1mm to 5mm) bits is sufficient for the purpose. Use drill bits of the following size to make holes for different components Mark points to be drilled.
Etched PCB: After etching, clean the copper clad using tap water. This will remove the dissolved copper from the copper except the copper the marker pen markings. Drill holes using appropriate drill bits.
Remove marker pen markings using by Thinner so that the tracks will appear as copper lines and insert component one by one to solder with track side.