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Model Train Circuits
Model Circuits     Model Airplane Circuits

Model Trains:  #'s - L       M - Z
 

Last Updated: November 30, 2017 10:29 AM

Circuits Designed by Dave Johnson, P.E. :

HO Model Train Lighthouse Flasher - HO train sets often have authentic looking scale model homes and buildings.  The hobby circuit below can be mounted inside a model lighthouse.  The electronic circuit drives a single LED lamp in such a way that it produces light which simulates the rotation . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2006

HO Train Lighthouse Flasher Revisited - HO train sets often have authentic looking scale model homes and buildings.    A while back someone asked me to design a flashing LED light, which he could mount inside a model lighthouse and have it operate so it would appear to rotate and flash.    I designed a working circuit but I was never pleased with the results.    Iím still not 100% pleased but the revised circuit below seems to operate a bit better than the older circuit.  Ö [ . . . Hobby Circuit designed by Dave Johnson P.  E.  , May 2012] . . . Hobby Circuit designed by Dave Johnson P.E.-December, 2012

LED Lighthouse Flasher for HO Model Train  - HO train sets often have authentic looking scale model homes and buildings.  The hobby circuit below can be mounted inside a model lighthouse.  The electronic circuit drives a single LED lamp in such a way that it produces light which simulates the rotation . . . Hobby Circuit designed by David Johnson P.E.-July, 2006

Lighthouse LED Flasher - This was originally designed for a model in a HO train set.  It simulates the behavior of the light from a lighthouse.  The LED intensity gradually increases, then flashes with a bright light and finally decreases slowly in intensity. . . Circuit by Dave Johnson P.E.-July, 2006


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

1.5 Volt 1970's Style Caboose Marker Flashing Red LED Light -  A circuit that drives a red LED from a 1.5 volt battery and simulates an incandescent light.  Duty cycle can be changed by selecting resistor values __ Designed by Dick Cappels

10A DCC Booster for Model Railways -  Most DCC base stations have puny current capabilities which are exposed if you want to run more than a few locos and peripherals on your model railway layout.  Problem is, DCC boosters are expensive, with a well-known 5A booster costing over $200.  Problem no longer; build this 10A beauty at a fraction of the cost.__ SiliconChip

2 Tone Train Horn -  With this circuit you can electronically simulate the noise of a diesel-train horn.  The sound is triggered automatically as the train reaches a desired place on the track so you can produce the sound as the train approaches stations, level crossings, etc.  The circuit can be built simply by using one 556 or two 555 timers __ Designed by Tony van Roon  VA3AVR

A Dual Alternating Flashing Light -  This project is best for mounting on a layout to light a crossing or ring a bell.   __ Designed by ML Rollins

A Dual Tandem Flashing Light-Powered by a 9 Volt Battery -  This circuit is powered by a 9 volt battery, suitable for warning lights on a tall structure.     (Personally, I can't recommend you buy anything but the Rollins Railroad Designs kit; for $4.00 you can't go wrong.  The 555 IC is about $1.50 by itself at Radio Shack) .  If you choose to buy all the parts yourself, realize you need ONLY two LEDs, not two of each; you should be able to mix and match colors.   __ Designed by ML Rollins

A Futuristic Twist on Model Trains -  24-May-11 -Design News:   For those who love model trains, here's a peek at the future - a solar-augmented monorail.  Joe Kopacz and his brother Justin created the monorail from scratch.  Joe, a mechanical engineer at Colorado State University, created the gadget for a school contest.  The monorail includes break regeneration __ Gadget Freak-Case #187

Alternating Flashing Light -  This project is best for mounting on a layout to light a crossing or ring a bell.   __ Designed by ML Rollins

Caboose Marker Flashing Red LED Light -  A circuit that drives a red LED from a 1.5 volt battery and simulates an incandescent light.  Duty cycle can be changed by selecting resistor values __ Designed by Dick Cappels

Computer Controlled Model Train Set -  I had two objectives in starting this mini project.  One was to help me get a better understanding of using a PC for control and automation.  The other was to make my younger brotherís train set a little less boring.  I never could __ Designed by Submitted Jane L, Northampton

DC Motor Pulse Width Modulation Speed Control -  This is a circuit for controlling the speed of small DC motors, it works nicely as a speed controller for an HO or N gauge model railroad.   __ Designed by G. Forrest Cook

D-I-Y remote control for a Model train layout. -  All you need is a picaxe, some code and a pair of pre-built UHF modules  (plus a few minor parts.__ SiliconChip

Dual Alternating Flashing Light -  This project is best for mounting on a layout to light a crossing or ring a bell.   __ Designed by ML Rollins

Dual Tandem Flashing Light-Powered by a 9 Volt Battery -  This circuit is powered by a 9 volt battery, suitable for warning lights on a tall structure.     (Personally, I can't recommend you buy anything but the Rollins Railroad Designs kit; for $4.00 you can't go wrong.  The 555 IC is about $1.50 by itself at Radio Shack) .  If you choose to buy all the parts yourself, realize you need ONLY two LEDs, not two of each; you should be able to mix and match colors.   __ Designed by ML Rollins

End of Train Flasher -  Schematic + Info + pictures __ Designed by Lennie Zink

Flashing Railroad Lights -  This circuit flashes two red LEDs for a model railway crossing.  __ 555-Timer

Flashing Red LED Light-1970's Style Caboose Marker -  A circuit that drives a red LED from a 1.5 volt battery and simulates an incandescent light.  Duty cycle can be changed by selecting resistor values __ Designed by Dick Cappels

Futuristic Twist on Model Trains -  24-May-11 -Design News:   For those who love model trains, here's a peek at the future - a solar-augmented monorail.  Joe Kopacz and his brother Justin created the monorail from scratch.  Joe, a mechanical engineer at Colorado State University, created the gadget for a school contest.  The monorail includes break regeneration __ Gadget Freak-Case #187

HO Model Train Lighthouse Flasher -  HO train sets often have authentic looking scale model homes and buildings.  The hobby circuit below can be mounted inside a model lighthouse.  The electronic circuit drives a single LED lamp in such a way that it produces light which simulates the rotation . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2006

HO Train Lighthouse Flasher Revisited -  HO train sets often have authentic looking scale model homes and buildings.    A while back someone asked me to design a flashing LED light, which he could mount inside a model lighthouse and have it operate so it would appear to rotate and flash.    I designed a working circuit but I was never pleased with the results.    Iím still not 100% pleased but the revised circuit below seems to operate a bit better than the older circuit.  Ö [ . . . Hobby Circuit designed by Dave Johnson P.  E.  , May 2012] . . . Hobby Circuit designed by Dave Johnson P.E.-December, 2012

Knightrider lights for Model cars -  This simple circuit drives 6 LEDs in 'Knightrider scanner mode'.  Power consumption depends mainly on the type of LEDs used if you use a 7555  (555 CMOS version) . __ Contact: IQ Technologies

LED Lighthouse Flasher for HO Model Train  -  HO train sets often have authentic looking scale model homes and buildings.  The hobby circuit below can be mounted inside a model lighthouse.  The electronic circuit drives a single LED lamp in such a way that it produces light which simulates the rotation . . . Hobby Circuit designed by David Johnson P.E.-July, 2006

LED Strobe Light -  Schematic + Info + pictures __ Designed by Lennie Zink

LED Traffic Lights -  The LED traffic Light circuit controls 6 LEDs  (red, yellow and green) for both north/south directions and east/west directions.  The timing sequence is generated using a CMOS 4017 decade counter and a 555 timer.  Counter outputs 1 through 4 are wire ORed using 4 diodes so that the  (Red, North/South) and  (Green, East/West) LEDs will be on during __ Designed by Bill Bowden

Level Crossing Lights -  Every model railway has a place where road and rail meet, and when it does, some form of warning is needed.  Flashing lights work well, but something is needed to drive them.  And that is where this circuit comes in.  All it does is flash lights and it is so simple anyone could build it! __ Contact: Collin Mitchell

Lighthouse LED Flasher -  This was originally designed for a model in a HO train set.  It simulates the behavior of the light from a lighthouse.  The LED intensity gradually increases, then flashes with a bright light and finally decreases slowly in intensity. . . Circuit by Dave Johnson P.E.-July, 2006

L'il Pulser Train Controller -  Here's a pulse-power train controller that's cheap and easy to build.  It works from any standard 12V model train supply.__ SiliconChip

Locomotive signal braking Module -  Brake modules are electronic circuits that let locos with digital decoder brake smoothly on a section of track.  The brake module generates a brake voltage to be fed to the track that is interpreted by suitable loco decoders, which then smoothly brake the loco.  The brake voltage is basically just negative dc, but on the bogobit brake modules  (except for the standard brake module) combined with a tailored current limit protection to avoid critical short circuits. __ Designed by Manfred Boehmel


Model Trains:  #'s - L       M - Z


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