PCB & Case beta release

First release

• new case for pcb.
• updated pcb compare to previous one. Now it's solder directly on ultrasonic module.
  • new pwm transistors in sot-23 package
  • all components in 0402 sizes
  • RS485 as inter-board interface instead of HVI2C
  • XH & PH connectors for LED's, RS485, power supply in
  • DC-DC convertor 24V to 12V is an option with can be connected to pcb.