20131015o
started work on an oscillator footprint
Finished the oscillator footprint.
Because its pads are distinct, I made pad number 0 identifiable by its non-rectangular shape and special outline. So we don't solder it all wrong like, y'know. Oscillator datasheet: TXC - 7W-60.000MBB-T
Wait. The oscillator datasheet includes a "suggested layout" in which the pads/connections cover a larger area than the actual connectors on the chip/component. "Suggested layout" is probably the same thing as "recommended land pattern" in the crystal datasheet. I should redo the crystal footprint, because I made the pads to the exact same specifications as the connectors in the datasheet.
And now, the footprint for the button switch toggle thing. datasheet for G3T13AP
- Pad width (in datasheet): 0.067
- Pad height (in datasheet): 0.028
- I am rounding that up to, hrm. 0.09 x 0.04. Also we made the support pads even bigger (0.09 x 0.05) because we couldn't figure out their exact y-position relative to the center.
- Ha-ha those measurements? They are in inches!
Here are proper measurements in mm
- pad width (in datasheet): 1.7mm
- pad height (in datasheet): 0.7mm
- round it up to 2mm x 1mm
- make thos support pads like, 2.2mm * 1.2mm
Anyway, it's done.
according to Håvard on the other group here's how you do it:
- find picture
- copy picture
- paste into microsoft word
- copy picture from microsoft word
- paste picture into altium
- looking through all the resistors and replacing the ones with an incorrect footprint.
- Rune wanted to remove the 2.5V power layer. This got me thinking about the I/O LEDs so I looked at leds.schdoc and noticed they were all connected to 15R resistors. According to LEDs, that means they're supposed to be hooked up to 2.5V. But they're I/O LEDs and are hooked up to the microcontroller which runs on 3.3V, I think. I'll have to ask Rune about it.
- both HSMG-C170 (Non-PSU) and HSMC-C190 (PSU) can be run at 3.3V using a 56R resistor apparently. That's cool because there's a bunch of those (package 1206) in the hw-lab.
- Making a schematic for the logo/Eye leds.
- Aaand that's done.
Whelp, I'm out of stuff I know that needs doin'.