Dcc Decoder Schematic. The dcc input signal comes in via the 6n136 fast optocoupler and is fed into one of the the avr intx pins. Simple multi meter is fine.
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There are two parts to this circuit. Leave no bare wire. They also offer a number of other products in assembled or kit form.
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Check for short circuits as you go before the booster is connected. Leave no bare wire. For those interested in making an ammeter for dcc here is his circuit schematic. Feedback sensor.
