Two-Rail DC Directional Lighting Circuit
Rail A (+)
DC in
Rail B (−)
DC in
R1
1 kΩ
R2
1 kΩ
LED1
Forward (white)
LED2
Reverse (red)
Tap from motor
brush leads
(not from track directly)
Forward: Rail A = (+) → R1 → LED1 lights. LED2 blocked.
Reverse: Rail B = (+) → R2 → LED2 lights. LED1 blocked.
Use 2.2 kΩ resistors for dimmer, more prototypical headlights.