My Homebrew D12 decoder is a drop in replacement for the original analog FLM (#7230) PCB. The decoder is designed to integrate into the RTB digital control infrastructure.
See also
- RTB_D13 - custom (Minitrix coach)
- RTB_D15 - custom (Minitrix V160)
- RTB_D16 - NEM651
- RTB_D20 - NEM651
- RTB_D21 - Next18
- RTB_D22 - Plux16
- RTB_D23 - NEM652
User Guides
- User Guide - DE
- User Guide - EN
- Fleischmann V100 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) logic level (3.3V)
- Function output: AUX3/AUX4 open drain
- Function output: AUX5 cabin light, LED on PCB
- buffer capacitor 2x330uF
- <10mA idle power consumption
- Firmware update over main tracks via DCC-R protocol
The current PCB layout uses SMD footprints with 0.5mm pitch and mainly 0603 parts. Reflow soldering is recommended whereas handsoldering will be difficult.
- 4-layer PCB, FR4, 0.8mm
- CPU: AVR64DA32
- Motor bridge: DRV8231
- Inrush limiter: R/D combination
The BOM is tailored to JLCPCB part#.
Filename structure: { pcb }{ code }{ version }.hex
Example: D12F0001.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 (####) |
See the D12 decoder in action.
This project is intended for hobby use only and is distributed in accordance with the Apache License 2.0 agreement.