Revision 1.4

Use a fast PD-regulator at 'fast out' to lock the laser. The gain sign can be set using on-board switches. There is also an 'unlock' mode.

Additional fixes and features:

• Update to KiCad 6
• Add 'no_divider' option
• Power supply protection:
  • TVS diodes
  • Electrolytic cap for negative supply
  • clamping diode for LT3045