3
3. The photo at the top of the article [1] shows the
completed board with the blue 12-volt relay shown
here. The black relay next to it is a 5-volt unit that fits
into a 16-pin IC socket.
running, higher-speed running, and so on. You can record all
these actions so that it can be played again and again. Ten or
more minutes of running can be recorded and stored indefinitely
for playback.
I use an isolated section of track as a “sync” block. I can con-
trol power to this block by a relay in the circuit. Producing a set
of train motions that start and stop in this block gives a very
reproducible sequence of movements can be played back.
