FK109 Alternating Flasher, 2 LEDs
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$4.99 (2 - 9)
$3.79 (10 or more $3.79 each)
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Now back in stock!

This kit flashes a 5mm red and green LED ON and OFF.. The speed of the flashing LEDs can be adjusted with an included potentiometer. This kit is a good beginners kit for those new to soldering. Uses for this product include model railroading crossing lights, blinking signs, highway barriers, traffic signals, etc.

Requires basic soldering skills, a small amount of solder and a 15 to 30 watt soldering iron.



  • Replace the 3.3k resistors supplied with 33k resistors and the flashing rate will slow down
  • Combine it with our Illuminator Kit (BK105 or BK205) to have the scene automatically turn on and off at predetermined intervals



Product Specifications

Power supply

9-12 VDC

PCB dimensions

1.4” x 1.22” x 0.5” (approx. 36mm x 31mm x 13mm)


2, one 5mm red and one 5mm green


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