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Makefile
README.md
fp-lib-table
ldgraphy-cape-cache.lib
ldgraphy-cape.kicad_pcb
ldgraphy-cape.pro
ldgraphy-cape.sch

README.md

LDGraphy Beaglebone Black cape

This is for the experimental set-up. This is not meant to be final, it focuses on easy measurement and mostly being a break-out for connectors for other parts. The final board will have all the parts that are now external modules integrated on one board.

  • Single 12V supply (uses a MP1584 based module to generate 5V supply for Beaglebone).
  • Inputs
    • Connector for photo diode used for the horizontal sync detection. Amplifier and Schmitt Trigger with fast OpAmps (MIC920 datasheet) and steep enough slew-rate to generate acceptable output for digital inputs (also, same as used in the laser driver to keep BOM small).
    • Two end-switches inputs.
    • One "user interface"-button input.
  • Outputs
    • Laser output connector for external laser driver.
    • Polygon mirror pulses and enable via 5-pin Polygon mirror connector.
    • Stepper motor (In this set-up: simply using a Pololu module)

(TODO: update schematic: there is now a cap accross R14)