Quick update on major areas.<\/p>\n
PCB:<\/p>\n
First pass of the following layers complete.
\nbottom copper
\ntop copper
\ntop silk<\/p>\n
Up next:
\nTop solder mask which has some unusual features.<\/p>\n
Pending:
\nSecond and then third passes through each layer (these should go much more quickly than the initial pass did)
\nPCB vendor DFM (design for manufacturing) check
\nNet list check against schematics
\nRounding off trace corners
\nFinal Pass
\nFinal DFM check
\nFinal Net list check<\/p>\n
Parts:<\/p>\n
Some parts have been received
\nOthers on order
\nStill determining best vendor for several key parts.<\/p>\n
Example of what goes on when sourcing parts. I spent several hours yesterday reviewing the board edge connector and evaluating sources. If I was doing a new design I would just pick an appropriate part and layout the board to suit. In the case of a replica you need to determine the specifications of the part, find the part that fits the specs and finally find a source.<\/p>\n
Overall Costs:<\/p>\n
Note that some rough estimates on PCB cost indicate that the gold finger edge on the board will raise PCB cost more than I initially thought. Costs continue to look higher than the Apple II due to to PCB, more expensive obsolete parts than the A2, and the power supply. The two transformers alone cost over $40 for a single Apple 1.<\/p>\n","protected":false},"excerpt":{"rendered":"
Quick update on major areas. PCB: First pass of the following layers complete. bottom copper top copper top silk Up next: Top solder mask which has some unusual features. Pending: Second and then third passes through each layer (these should … Continue reading