Subscriber & Member Login

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

Speaking of signals

1017 views
0 replies
1 rating 2 rating 3 rating 4 rating 5 rating
  • Member since
    February 2002
  • From: Reading, PA
  • 28,738 posts
Speaking of signals
Posted by rrinker on Wednesday, July 20, 2011 5:14 PM

 I haven't checked out ROb Paisley's electronic site in a while, and oen of the top new items he has is a VERY simple signal controller to drive bicolor LEDs in searchlight signals to get red/yellow/green indications. You still need a block detector of some sort, btu the actual driver board shouldn;t cost more then $5 to make, there's just 1 IC, a 556 timer, and one transistor, plus some resistors and capacitors and diodes. It provides a simple red/yellow/green signal system, for those looking just to animate the signals in a reasonable but not necessaily exact prototype fashion.

 Since the block detection is independent, it will work with DC or DCC, no computer, each circuit just cascades to the next one. And the duty cycle for yellow isn;t exactly 50/50, which usualyl makes a bicolor LED look more orange than yellow.

 So, if you want a simplified signal system for modern searchlight signals: http://home.cogeco.ca/~rpaisley4/556SearchLightSignal.html

                              --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

Subscriber & Member Login

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

Users Online

There are no community member online

Search the Community

ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT
Model Railroader Newsletter See all
Sign up for our FREE e-newsletter and get model railroad news in your inbox!