We finally finished the Scale Speedometer Project, and are heading off to the Charleston Area Model Railroad Club to install it. We used the Adafruit I2C 7 Segment backpack, a Arduino Nano clone, and two IR transceivers, for total project
Ok, what does this have to do with Arduino or Raspberry Pi? Well, I am working on a couple of Pi emulating antique computer projects, and said, let’s try this! I could use some financial help with a few projects
The three 7 segment LED’s from part 2 require 24 i/o pins on the Arduino. We can use port expanders to limit that to 2 pins, the I2c connections. Each MCP23017 chip supports 16 i/o pins, so two chips will
In part two (see part 1 for the train detection circuit) we are addressing the three 7 segment displays. We are using Common Anode displays, so we send a low to each segment to light them up. Use whatever you
The guys at the Model Railroad Club wanted a scale speedometer displaying the scale speed of the train as it passes a point on the layout. I’m using two IR transceivers connected to an arduino to detect the time it
Another cool exhibit on your model railroad is flickering firelight. Whether it’s a hobo campfire, or a burning building, this adds to the layout’s realism. An Arduino, 3 130 ohm resistors, two yellow LEDs, one red LED, and you have
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