Electronic circuits and circuit boards that are useful for model railroads. The material here consists of the most popular circuits used by modelers.
This first section is a selection from a large collection of circuits and circuit boards by Robert Paisley. His page is no longer supported but the information is well presented and useful.
Main Page – http://www.circuitous.ca/CircuitIndex.html
Signals – A collection of circuit diagrams for block signals. Three aspect, two aspect and spotlight signals are covered. There is a circuit board parts list as well as a pcb board and completed signal module included in the information. http://www.circuitous.ca/3LightSignals2012.html
Block Occupancy Helper Circuit – This circuit would be used to hold a BLOCK OCCUPIED condition as a train passes out of the block even if the normal detector is not sensing a train.
4 Photo-Detector With Delayed Release And Bipolar Output – This circuit is ideal for driving signals without flicker or relays without chatter.
Stall Motor Switch Machine Drivers –
Above And Across The Track Infrared Detectors – This page presents information on infrared – Above The Track and Across The Track train position detection circuits. The circuits are designed around the LM339 quad comparator chip and can use a wide assortment of matched infrared – emitter / detector pairs.
Automated Point To Point Layout –