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18 Volt PSU for Radio Controlled Throttles - (electronic circuit added 7/03) |
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2 Tone Train Horn - (Tony van Roon's circuit added 11/06) |
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2"H" Bridge Direct Current Motor Control Circuit (LM311) - This page features
H-Bridge circuits used for controlling direct current motors. Several designs are
shown using both CMOS and Bi-Polar power devices. These circuits could be used as the
basis for Model Railroad DCC Boosters or PWM motor controllers. (resource added 05/08) |
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3 Amp Three Terminal Regulator Type Throttle E+F - The schematic above is of a
Three Terminal Regulator (TTR) design based on the LM350K adjustable voltage regulator
which has a 3 Amp current rating as opposed to the LM317K with a 1.5 Amp rating. The
LM 350 is internally….(electronic circuit added 7/03) |
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324 OpAmp Stall-Motor Switch Machine Drivers - The circuits on this page are
switch machine drivers that can be used to operate Stall-Motor type switch machine
motors. The circuits use LM324 Quad or 358 Dual operational…(schematic added 08/08/08) |
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4 & 8 Infrared-Proximity Detectors (TSOP4830) - In this circuit the TSOP4830 is
used as a sensitive infrared detector that does not require shielding from room
lighting. The detector will work under almost any lighting condition from complete
darkness to full sunlight….(added 08/08/08) |
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5 Times Around Circuit - The 5 Times Around circuit was designed to automatically
let an N Scale locomotive and car travel around a loop 5 times and stop for
approximately a minute and then repeat the cycle. The loop of track was….(electronic
circuit added 08/08/08) |
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5 Times Around Circuit for Layout Animation - (electronic circuit added 7/03) |
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555 Timer Stall-Motor Switch Machine Drivers - The circuits on this page are
Switch Machine drivers that can be used to operate slow motion Stall-Motor type switch
machine motors. The circuits use LM556 dual timer chips to provide a
PUSH-PULL…(circuit added 04/05/06) |
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6 Aspect-Searchlight Signal Driver (LM555) - The circuit on this page is a 6
Aspect driver for a bicolour LED type Searchlight Signal....(circuit added 8/03) |
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8 Unit Photo Detector Circuit Board - There are two versions of the "8
Photo-Detector" on this page. Scroll down to view all of them. The circuit on this
page is for a simple light detector circuit board that has 8 detectors that can be
used with visible or infrared light systems. The detectors use LM339 voltage
comparators as the active element. (train design added 04/05/06) |
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A 3 Amp, Three Terminal Regulator Type Throttle (E+F) - The schematic above is of
a Three Terminal Regulator (TTR) design based on the LM350K adjustable voltage
regulator which has a 3 Amp current rating as opposed to the LM317K with a 1.5 Amp
rating….(electronic design added 04/05/06) |
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Across The Track Infrared Detectors - This page presents information on infrared,
'Across The Track' train detection circuits. The circuits are designed around the
LM339 comparator chip and can use a wide assortment of matched infrared, emitter /
detector pairs….(diagram added 05/06/07) |
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An Ammeter Made From A Voltmeter - The above schematic is of a circuit that will
convert a 0-15Volt voltmeter to a 1.5Amp ammeter. The Circuit is for a 'Shunt' type
ammeter that allows a meter movement with a small current rating to be used to measure
a much larger current. In this example 1 milliamp through the meter coil...(circuit
added 04/05/06) |
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AT Power Supplies information - "AT" type computer power supplies are often used
by model railroaders to provide accessory power for their layouts. These supplies are
reasonably inexpensive due to their age and have been removed from old personal
computers. |
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Audible Train Approach Warning - This is a circuit that will give an audible
warning that a train is entering a particular section of track. The detector also has
a LED that indicates when a train is entering or leaving the block…(electronic circuit
added 7/03) |
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Audible Train Approach Warning Circuit - This is a circuit that will give an
audible warning that a train is entering a particular section of track. The detector
also has a LED that indicates when a train is entering or leaving the
block…(electronic circuit added 04/05/06) |
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Automatic Grade Crossing Flasher Circuit - (electronic circuit added 7/03) |
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Automatic Incline Railway System - (electronic circuit added 7/03) |
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Automatic Railway Grade Crossing Flashers - (electronic circuit added 05/06/07) |
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Automatic Reversing Circuit Inexpensive System 2002 - This page presents a low
tech, low cost and reasonably simple automatic reversing circuits. They uses toy train
set power packs to control the top speed of the shuttle while diodes in the track
circuit provide a method of stopping the shuttle at the ends of the track as well as
crude control of the trains acceleration and deceleration....(electronic circuit added
7/03) |
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Automatic Reversing Loop information - This page is about automatic reversing loop
control circuits. The first switch machine controller is very basic. More complicated
circuits will be added as they can be thought up and tested out. |
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Automatic Station Stop Circuit - The first braking step slows the train gradually
until it is at the station. The second brake step then stops the train just quickly
enough to allow the first or second coach to stop in front of the station….(electronic
circuit added 7/03) |
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Automatic Station Stop Circuit with Two Stage Braking - The "Automatic Station
Stop Circuit" brings a train to a station stop in two braking steps and then sends the
train on it's way after a set period of time. The first braking step slows the train
gradually until it is at the station. The second brake step then stops the train just
quickly enough to allow the first or second coach to stop in front of the
station....(circuit added 04/05/06) |
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Automatic-Railway Grade Crossing - The Grade Crossing circuit uses six, visible
and infrared light sensitive phototransistors to control the operation of the
flashers. The protected section of track can be as long or as short as desired and
does….(circuit added 04/05/06) |
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Basic Infrared Light Train Detection - (circuit / schematic design added 6/06) |
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Block Occupancy Detector For DCC Or AC - This detector uses the "Diode, Voltage
Drop" method and has been designed to use a minimum of parts and use as little current
as possible when no trains are detected. The circuit takes its operating power from
the booster system supply to the rails…(added 07/07/07) |
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Block Occupancy Detector Helper Circuit information - 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….(added 07/03) |
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Capacitor Discharge Power Supplies For Twin Coil Switch Machines - The schematics
on this page have sections that have heavier lines. These lines represent the portions
of the circuit that are subjected to large current surges when the switch machines are
operated. Careful attention to good wiring and soldering techniques should be used for
these sections to ensure good results....(circuit added 08/08/08) |
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Computer Controlled Model Train Set - (electronic circuit added 7/03) |
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Crystal Controlled FM Transmitter - The calculators on this page can be used to
find current limiting resistors and currents for Light Emitting Diodes. The first
calculator determines the resistance for a desired LED current while the second
calculates the current for a given resistance. |
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Current Measurement for DCC Systems - (electronic circuit added 7/03) |
