All you need is:
- sand paper (fine grit preferred) I used P400
- 0.8mm drill bit
- ammonium persulphate
- dalo pen (etch resistant pen)
Step 1: PCB Size, Drilling and Drawing Up
Step 2: Ammonium Persulphate
Once you have copied your tracks onto the PCB, let the ink of the dalo pen dry fully before you place the PCB into a solution of ammonium persulphate and warm water to allow for the ammonium persulphate to etch the PCB. After the PCB has been fully etched, take it out of the solution and place in cold water and just to be on the safe side I would recommend gloves for this. You can touch it after its been in the water. Before you start soldering, you should gently rub the PCB with the P400 sandpaper again to get rid of the Dalo pen ink. If you have followed these steps correctly, you should not have any unwanted connections or missing joints/tracks. If so you can scratch the unwanted connections and join the missing connections. If everything is done properly you can start soldering.