Board characteristics: - two layers, components only on front - smallest components are 0402 and 0.5 mm pitch QFN - one through-hole component: USB connector CON1 - the following component orientation markings are on the silk screen: B1: circle near pin 1 D1: plus sign at the anode U1, U2: triangle at the corner between pins 1 and 32 Design files: atusb-front.png Illustration of the PCB's front side (with silk screen) atusb-bom.csv Bill of materials atusb-pos.csv Automatic insertion file (front only) atusb-footprints.pdf Footprint reference drawings The PCB design files (Gerbers, etc.) are in a separate archive, atusb-pcb-* Interpretation of files: - for all coordinates, the origin is the lower left corner of the board - coordinates in atusb-pos.csv are in inches - rotation in atusb-pos.csv is in degrees, counter-clockwise - in the footprint reference drawings, footprints are shown in the 0 degree orientation and with their center at the crosshairs