Led Connection
When using leds it is important to connect them the right way around.
The negative lead (cathode) is identified by a flat on the side of the led body, and by having a
shorter lead.
The red and green leds share the same output, so for instance, the first set of points are
represented by a red and green led with their anodes connected to terminal A1+.
All the green led cathode connections are wired to the C1- terminal.
All the red led cathode connections are wired to the C2- terminal.