Programmer for DCC Model Railway Control
Opens the door to new possibilities
Published in issue 343, May 2005
The DCC system distinguishes itself from the competition (the Märklin/EEDTS-system) by being far more flexible, but also for the necessity of having to program the decoders. The majority of control boxes on the market perform this function only poorly, usually only a limited number of parameters are accessible. The stand-alone programmer presented here offers a great deal more functionality!
The article states that the microprocessor fuse bits have to be set to the defaults of the Pony programmer software. Because the Pony defaults are different from the microprocessor’s factory defaults, they are repeated here: none of the 16 bits must be programmed (they must be left at ‘1’), except SPIEN. SPIEN (serial program enable) should be left at the factory default, i.e., programmed (‘0’). The factory defaults will cause the chip to operate at the 1-MHz internal oscillator instead of the 8-MHz external quartz clock. You can easily verify that the chip is running on the external quartz clock. Connect a DVM in DC voltmeter mode to pin 19 of the processor. The level measured should be between 0.5 V and 1.5 V. If not, ICs supplied through our Readers Services (item code 040422-41) should be returned to our software service department for free reprogramming.
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Click below to download a PDF copy of this article from Elektor magazine. Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.
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