Bob Cousins
Bob Cousins
There appear to be two problems: 1. AREF is an input to Due, not an output, and it is not connected Fix is to revert to 3.3V as reference voltage,...
5V is provided by the Due, but is limited to 800mA (or less). This is not really enough for extras like LCD, SD, servos, expansion boards. RAMPS has a seperate...
The default state for GPIO pins leaves these outputs turned on. Add 10k pulldown resistors to prevent accidental turn on.
If the Due is not powered but RAMPS-FD is, then the heater outputs (D8-D11) default to an on state. Redesign FET control circuit to ensure that heater outputs are not...
A non-volatile storage is useful for storing config or board identification to allow single firmware for different shield versions. For compatibility with RADDS, use 24LC256 type on I2C-0. Compatible with...
Consider adding connector for micro-SD card. SD card can be used for storing config and data files. uSD can be interfaced directly to Due, but will need level conversion for...
Change the 10uF electrolytics caps used on the ADC filters for ceramic.
In https://github.com/KiCad/kicad-doc/blob/master/src/eeschema/eeschema_create_a_netlist.adoc, the examples show directives +PSPICE/-PSPICE used, but AFACIK these directives are longer supported and do not produce the correct netlist for ngspice. Suggested fix : remove +PSPICE/-PSPICE directives...
In section 4.1: > %Cx = comment (x = 0 to 9 to identify the comment) This might be allowed inside PL Editor, but eeschema and pcbnew only support 4...
Some users have found the specification of shortcuts confusing e.g. "pressing the Place component shortcut key (a). " This could be improved by replacing the text with a graphic icon,...