A cheap Booster (for example: H-Brücke TLE5205) to provide a DCC-Signal for programming and main track. A second short circuit detection for the internal booster with a seperate RailCom-Signal. To activate the interface you need to uncomment: #define BOOSTER_INT #define BOOSTER_INT_ON LOW #define BOOSTER_INT_OFF HIGH
You can use a H-Bridge driver TLE5205 or equal like TLE5206-2. They can provide up to 5A. A discription you can find under Booster3. For the RailCom Output you must use the hardware of Booster3R.
Attention: The logic table of the Datasheet from the TLE5205 is different then the TLE5206!