WEEK03: electronics productionThis week we learned how to do electronics production using a desktop milling machine. This technique uses a material called FR1, a printed circuit board (PCB) substrate that is easy to machine and robust enough for quick prototypes. We used a Roland SRM-20, a 3-axis router with an 1/8" set screw collet that is controlled by a CBA-developed web browser program called mods. The tools are tiny carbide end mills; 1/64" for routing traces, and 1/32" for cutting out the finished board. 1/64" is 0.016", which is more than adequate for the SOICs and 0805 parts we'll be using for the class. We had two assignments: (a) characterize the milling machine as a group; and (b) mill, populate, and program an AVR programmer like this one. Thank you to Fillipos for taking the time to teach us all how to use the SRM-20!
- test coupon traces and outline for evaluating mill capabilities from here
- brian's avr programmer traces and outline from here
- avr programmer firmware