rtb_d15

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git4dcc/rtb-d15

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Description

Imported from GitHub: git4dcc/RTB_D15 · commit f847bc3 · license Apache-2.0

Description

Minitrix V160 N-Scale Locomotive Decoder (DCC/RailCom)

README

RTB_D15

My Homebrew D15 decoder is a drop in replacement for the original analog Minitrix (#11130) PCB. The decoder is designed to integrate into the RTB digital control infrastructure.

User Guide - DE
User Guide - EN

Decoder features

Minitirx V160 PCB decoder
DCC
- DCC-A automatic logon
- DCC-R protocol extension
- Service Mode Programming
Railcom
- Channel 1/2
- POM, xPOM
- DYN: Speed, QoS, Track-voltage, Motor-current, AUX-current, Temp, Distance travelled
7-18V track voltage
heartbeat LED
adjustable max motor current (default 250mA)
adjustable max AUX current (default 250mA)
over temp protection
Function output: LF/LR (dimmable, 1.4kHz), LED on PCB
Function output: AUX1/AUX2 (dimmable, 1.4kHz) for driver cabin (LEDs on PCB)
Function output: AUX3/AUX4 logic level
Function output: AUX5/AUX6 open drain (each 250mA)
buffer capacitor 4x330uF
optional 9-axis orientation sensor
<10mA idle power consumption
Firmware update over main tracks via DCC-R protocol

Hardware

The current PCB layout uses SMD footprints with 0.5mm pitch and mainly 0402 parts. Reflow soldering is mandatory whereas handsoldering almost impossible.

PCB

4-layer PCB, FR4, 0.8mm
CPU: AVR64DA32
Motor bridge: DRV8231
Inrush limiter: TPS22810
9-axis absolute-orientation sensor: BNO055

Kicad

Schematic | Layout | Gerber

:yellow_circle: Requires my Kicad project library RTB_SamacSys in the same directory tree.

Firmware

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

Example: D15F0001.hex

	Description
pcb	Name of matching hardware (D12)
code	Type of code contained (R=rom, B=bootloader, F=flash, U=bld update, P=UPDI factory code)
version	Release version (####)