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the design may help folks unravel some of the "mystery" of
electronics.
Functional blocks
There are three functions that this circuit needs to perform, as
shown in figure 1.
Power supply
Camera power
Battery charger
So, let's look at each function by itself and understand how to
select each component.
Power supply
This will turn the track DCC into a DC voltage. The DC voltage
will be slightly less than what the track DCC voltage is set to.
The schematic is shown in figure 2.
The heart of this function is the bridge rectifier – the four
diodes near the middle of figure 2. It stacks all of the posi-
tive DCC pulses on one side and all the negative ones on the
other side. It can come as a module with four terminals on it
1: Block diagram.
1
