Project 12

12a : Build a switch operated HO scale Target Signal using 1 bicolor LED
 This project involves the construction of a simple target searchlight type signal system operated manually by a double pole switch and 9 volt power supply. This signal system is made using a single,  two lead, bicolor LED Red and Green.

12b : Use a modified Bachmann(TM) HO Block Signal with 2 LEDs added

 This project involves adding a Green and Red LED to a Bachmann HO Block signal and operating it using the same 9 Volt power supply and switch.

Both signals can be operated automatically using a microcontroller along with a train occupancy detection system. (a future project)  

Video Build a Bicolor LED Target Signal 12a

 Project 12a   Project 12b