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Design
Hardware designs have been built using the Kicad software, they are located under the trunk source directory trunk/design/kicad. They all use a specific Kicad Library which you can download from Google Drive: MyKicadLibrary.
Mount Motorization
Under trunk/design/kicad/gastromount
This is a Pic 18F4431 based mount motorization. Motor drivers use L298 (46V, 2Amps/phase) circuits and allow for PWM current control and global current limiting. The project is made of separate boards:
* Motors: a board with 2 L298s together with a quad comparator LM339 for current control, and some logic to interface with a MCU
* Board18F4431: simple MCU board with a mini-joystick, and connections for the Motors board and a future focuser board based on BoardL293
* BoardConnector: supports the external connectors RS232, power and ST4 port.
* BoardDNP9200 has been replaced with a simple breadboard (SSV DNP 9200 is an ARM9 AT91RM9200 starter board which I use to embed an INDI server for my devices).
Misc
Under trunk/design/kicad/misc
Miscelleanous designs, mainly around stepper motor controllers as for now.
Firmware
PIC Skywatcher protocol
Under trunk/pic/skywatcher.
This is a direct implementation of the skywatcher protocol on the PIC 18F4431 as described in the Skywatcher page. It runs on the gastromount device described above. Code is written in C and compiled with sdcc.