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when a magnet under the train trigger a reed switch
use the following transformer to power them if you don't have one:
2 targets showing Red/Green light
Operating Voltage: prewired resistor for 12V to 16V use
nav-trigger{display:block
1 x HO scale model 3/2 colors block signal full sunshield metal 2 targets #U3D2 when a magnet under theStore Home New Arrival Ending Soon Add to Favourites View Feedback Contact us Store Categories USA store HO Scale OO scale O Scale N Scale Light Emitting Diode LEDs Grain of Wheat Bulbs Wholesale Buy In Bulks Switches Connectors G Scale Z Scale Electronic Component Resistors Nintendo DS Nintendo GBA SP UK store HO gauge OO gauge O gauge Light Emitting Diode LEDs N gauge Switches Connectors Grain of Wheat Bulbs Wholesale Buy In Bulks G gauge Z gauge
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