First of all it’s the first time I am doing a complex project with Arduino and also with any electronics.
For the past months I have been working on some sort of synth with an AY-3-8910 chip.
I have finished with almost all of the Arduino programing and did a schematic with Eagle for taking the next step, creating a PCB and soldering the components for a definitive installation.
From the attached image you can see that the circuit is somewhat complex and after designing the actual board (2nd image) everything fits in a 12x12 cms square (4.8x4.8 inches)
Now, using Eagle autorouter it’s imposible to do all the connections on a single layer, so I have to use two (up and bottom). That increments the difficult of printing and etching.
I tried printing both layers with the toner method (using a magazine paper) but I failed because I couldn’t align both layers correctly, I think it’s because it was difficult to do with magazine paper. After doing the holes with a manual drill and a 1mm drill bit I noticed that the component holes where off from the actual printed place.
What would you recommend me to do? Should I try again with photographic paper? Do you think it would be better separate it to different single layer modules and connecting them with cables?
What do you think?