RTB_C11

Smart Power Protection: This homebrew powerboard actively monitors input voltage to safeguard connected RTB modules. It automatically interrupts power to the RTB subsystem if the voltage drifts outside the safe range of 12V to 18V, preventing damage from erroneous power conditions.

See also

• RTB_C10 - Master
• RTB_C12 - Micro Booster
• RTB_C13 - Track Sensor
• RTB_P15 - Base

User Guides

• User Guide - DE
• User Guide - EN

Powerboard features

• FDX bus
  • 2Mbps full duplex, RS-485 differential
• HDX bus
  • 2Mb, half duplex, RS-485 differential
  • up to 2A DCC continuous current
  • up to 2A HDX continuous current
• Power input
  • Under-, Over-, Reverse voltage protection
  • 14-18V DC, >4A
  • Soft start
  • Short circuit detection with software configurable latch-off, hiccup or current limiter mode
• Expansion slots
  • Bus Master Slot (Slot-A)
  • Booster Slot (Slot-0)
• firmware update over the bus

Hardware

The PCB layout uses SMD footprints with 0.4mm pitch and a mix of 0603 and 0402 parts. Reflow soldering is mandatory.

top	bottom

PCB

• 2-layer PCB, FR4, 1.6mm
• CPU: AVR64DA48, Atmega4809
• PMIC: MAX17613AATP+

Kicad

Schematic | Layout | Gerber

Firmware

Filename structure: { pcb }{ code }{ version }.hex

Example: C11F0001.hex

	Description
pcb	Name of matching hardware (C11)
code	Type of code contained (R=rom, B=bootloader, F=flash, U=bld update, P=UPDI factory code)
version	Release version (####)

Firmware files

UPDI / Fuses

The fuse settings as well as the P-code (C11Pxxxx.hex) has to be installed by using UPDI.

Fuses Setting
<img src=supplemental/images/C11_fuses.jpg width=500>

Images

Standalone	Closeup	FDX + HDX bus connected