I've pushed a bunch of schematic changes to the github, based on recent discussions. I didn't add a 5V regulator for now, I realised we still need the 12V regulator to provide VIN to the Due.
Brief highlights :
I haven't made any changes to the board layout.
[attachment 23178 RAMPS-FD-Schematic.pdf]
Brief highlights :
Quote
commit d03338f50022aa99abe64a4e7b85a0ea21731da6
Author: Bob Cousins
Date: Wed Dec 18 22:42:30 2013 +0000
RAMPS-FD schematic: remove some redundant pulldowns;
add some explanatory notes;
update PDF
commit 1f6033e6de049db5228018c25bbc595a0df1a7aa
Author: Bob Cousins
Date: Wed Dec 18 22:20:43 2013 +0000
RAMPS-FD schematic changes:
#3 replace C301, C302, C303 and C501 with ceramic 0805;
#4 change endstop connectors to 6x1 and 6x2 to allow key position
#9 change E-STOP connector to KK type;
#18 add 10k pulldowns on heater outputs from CPU
#19 change E-STOP buffers to HCT type to always drive FETs at 5V and remove inverting drivers on heater outputs;
#20 add 24LC256 I2C EEPROM
I haven't made any changes to the board layout.
[attachment 23178 RAMPS-FD-Schematic.pdf]