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"H" Bridge Direct Current Motor Control Circuit (LM311) - This
page features H-Bridge circuits used for controlling...Several designs are
shown using both CMOS and Bi-Polar power devices….scroll to view all of the
circuits…. [from Rob Paisley's Model Train web site] |
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0-10V Control for RC Servos - In this circuit NE555 is configured
as astable multivibrator. main timing capacitor (220 nF) is always
changed to voltage level which is determined by voltage on NE555
pin 5 (in this circuit that voltage is aroun 1.6V). When timing
capacitor is.... |
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1.5 Volt Power Supply - LM317 - This circuit is for a 1.5 Volt
power supply using the LM317T Adjustable Voltage Regulator.….Scroll down for
this design....Circuit for model railroad trains…. [from Rob Paisley's Model
Train web site] |
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10 Amp - Fast Electronic Circuit Breaker - The circuit on this
page is for a fast acting electronic circuit breaker for use with fixed and
variable,...[from Rob Paisley's Model Train web site] |
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10, 8 And 6 Step LED Circuits (CD4017) - Each time switch S1 is
closed the count on the CD4017 advances by 1 step and the coresponding LED
turns on….Circuit for model railroad trains…. [from Rob Paisley's Model
Train web site] |
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2 Amp - DCC - Accessory Booster - Circuit for model railroad trains…. [from
Rob Paisley's Model Train web site] |
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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....[Tony van Roon's circuit] |
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2 Watt Switching Power Supply - In this small switching power supply, a
Schmitt trigger oscillator is used to drive a switching transistor that supplies
current to a small inductor. Energy is stored in the inductor while the transistor is
on, and released into the load circuit when the transistor switches off. The output
voltage is dependent on the load resistance and is limited by a zener diode that stops
the oscillator when the voltage reaches about 14 volts. Higher or lower voltages can
be obtained by adjusting the voltage divider that feeds the zener diode. The
efficiency is about 80% using a high Q inductor....[Bill Bowden's website] |
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250-Amp Speed Controller for RC Cars - Radio Controlled cars have increased
in popularity from the time when they were first introduced. Initially, they were
little more than toys. Now they have matured to an international sport…. [by Ken
Stone] |
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27MHz superregenerative receiver - for RC model remote control…. [Peter
Jakab, Electrical Engineer, Engineer of Informatics] |
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27MHz toy car receiver - (circuit / schematic design added 05/06/07) [Peter
Jakab, Electrical Engineer, Engineer of Informatics] |
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27MHz toy car Transmitter - schematic only, L1=same as L4, L2=15
turns, .5mm wire, 5mm diameter, L3=3.5 turns, .5mm wire, 5mm diameter] [Peter Jakab,
Electrical Engineer, Engineer of Informatics] |
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3 Amp DCC Booster (LMD18200) - The DCC booster shown on this page uses the
LMD18200 motor driver H-bridge IC. The booster's designed output rating is 3 amps at
15 volts. [from Rob Paisley's Model Train web site] |
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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 a LM350K regulator which has a 3 Amp
current rating as opposed to the LM317K with a 1.5 Amp rating. [from Rob Paisley's
Model Train web site] |
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3 Light Signals - This page presents a 3 Light signal control circuit for
model railroads. The circuit produces only solid Red, Yellow and Green signal
indications. The circuit can be wired for NORMAL and APPROACH type lighting of the
Green signal. [from Rob Paisley's Model Train web site] |
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3 Position Servo Driver Circuit (LM555) - This circuit while crude is an
inexpensive way to drive or test servo motor systems without the need for a compete
system….Circuit for model railroad trains…. [from Rob Paisley's Model Train web site] |
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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… [from Rob Paisley's Model
Train web site] |
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3Amp - DCC Booster Circuit #1 (LMD 18200) - The first schematic is for a
basic 3 Amp - DCC Booster using the LMD 18200 CMOS, H-Bridge. Included in
the design is a 5Volt regulator that supplies power to the DCC signal generation and
display circuitry…. This page features H-Bridge circuits used for controlling
direct current motors - scroll to find this one…. [from Rob Paisley's Model Train web
site] |
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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….scroll down for this one…. [from Rob Paisley's Model Train
web site] |
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4 Photo-Detector With Delayed Release And Bipolar Output - The circuit on
this page is for a visible and infrared light detector circuitboard that has 4
independant detectors. The inputs are sensed by LM339 voltage comparators and the
outputs are from LM556 timers…. [from Rob Paisley's Model Train web site] |
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5 Second Ramp Generator for Locomotive Sound Card Demonstration - The
circuit on this page is designed to produce a timed throttle output for demonstrating
on board sound systems in a large scale locomotive….. [from Rob Paisley's Model Train
web site] |
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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. [from Rob Paisley's Model Train
web site] |
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50% Output Duty Cycle (Fixed) Using Logic Devices - Uses the LM555 timer or
its cousins with other letter prefixes. There can be minor differences between 555
timer IC's from different manufacturers but they all should be useable for any
circuit. Designed for Model Trains…. [from Rob Paisley's Model Train web
site] |
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50% Output Duty Cycle (Variable) - Uses the LM555 timer or its cousins with
other letter prefixes. There can be minor differences between 555 timer IC's from
different manufacturers but they all should be useable for any circuit.
Designed for Model Trains…. [from Rob Paisley's Model Train web site] |
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555 Timer Current Draws - Uses the LM555 timer or its cousins with other
letter prefixes. There can be minor differences between 555 timer IC's from different
manufacturers but they all should be useable for any circuit. Designed for
Model Trains…. [from Rob Paisley's Model Train web site] |
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555 Timer Output Section - Uses the LM555 timer or its cousins with other
letter prefixes. There can be minor differences between 555 timer IC's from different
manufacturers but they all should be useable for any circuit. Designed for
Model Trains…. [from Rob Paisley's Model Train web site] |
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556 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 output
to reverse the polarity of the voltage to the switch machine motors. The output of the
drivers is equivalent to a DPDT toggle switch....[from Rob Paisley's Model Train web
site] |
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6 Aspect Searchlight Signals - The circuit on this page is a 6 Aspect driver
for a bicolour LED type Searchlight Signal. The available signal indications are;
SOLID RED, YELLOW, GREEN, and FLASHING RED, YELLOW and GREEN. The circuit can also
turn the signal OFF for approach lighting if desired. [from Rob Paisley's Model Train
web site] |
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74194 BIPOLAR Stepper Motor Driver Circuit Circuitboards and Parts - This
page features simple and inexpensive, stand alone BIPOLAR stepper motor driver using
parts that are available from many sources. The driver is designed for
medium and low speed applications with motors that draw up to 0.6 amperes per phase….
[from Rob Paisley's Model Train web site] |
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74194 UNIPOLAR Stepper Motor Driver Circuit Circuitboards and Parts - This
page features a Bipolar stepper motor driver using three ICs. The circuit can be used
to drive relatively low speed applications at currents up to 0.6 amperes per phase.
The circuit uses parts that are available from a variety of sources. [from Rob
Paisley's Model Train web site] |
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8 Photo-Detector Circuit - There are two versions of the "8 Photo-Detector"
circuitboard. Circuitboards and parts are available for both versions of this
circuit....[from Rob Paisley's Model Train web site] |
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8 Photo-Detector PCB Inverting - The circuit on this page is for a visible
and infrared light detector circuitboard that has 8 detectors. LM339 voltage
comparators are the active element. These detectors can be used as part of
other light detector circuits…. [from Rob Paisley's Model Train web site] |
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8 Photo-Detector PCB Non Inverting - The circuit on this page is for a
visible and infrared light detector circuitboard that has 8 detectors. LM339 voltage
comparators are the active element…. [from Rob Paisley's Model Train web site] |
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