Here they are, I finally found some time to take some pics and upload them.
This is the first prototype of the miniDCC controller/programmer/booster that I built. Wrong keyboard and all, but it seems to work ok. I have a proper 16 key keyboard now and a nifty project box I found today for $3. The IDE cable is pretty ugly, but I didn't have anything else handy. The second prototype will hopefully be much nicer.
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This is the PIC board. It scans the keypad, drives the LCD display and also generates the DCC waveform that modulates the h-bridge.
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This is what I call the "safety" board, it has several functions:
1) detects current overloads (shorts) and shuts of h-bridge if detected
2) monitors the DCC signal from the PIC board and turns off the h-bridge if invalid or missing
3) supplies 5V regulated to the PIC board
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Here are pics of an Athearn that I converted to DCC, what a pain. Nice trains, but they use a real lousy track power distribution system IMO. I mean really, swaging the ground lug. Unplug the light support once and it's useless after that. I drilled and tapped a hole, promptly breaking a screw off in it. I then made another one on the other side of the chassis that turned out nicely. It's kinda big (4-40), but hey it's what I had on hand. ;-) I still have to add my lights and shrink wrap the extra wire.
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You can see that my layout is still in the design stages. The floor is the biggest work area I could find. ;-)