|
|
|
CA4060B Timer Circuits - Circuit for model railroad trains…. [from
Rob Paisley's Model Train web site] |
|
Capacitor Discharge Power Supplies - This page presents various
capacitor discharge power supply circuits for use with twin coil switch
machine motors. Also shown are some optional wiring methods that can be used
to enhance the availability and control of these supplies…. [from Rob
Paisley's Model Train web site] |
|
Colour Shifting For Bi-Colour LED's - These circuits provide a
means of altering the YELLOW output of RED / GREEN type two colour light
emitting diodes. These circuits use the LM555 timer chip....Circuit for
model railroad trains…. [from Rob Paisley's Model Train web site] |
|
Comparator Controlled H-Bridge Circuits (LM311) - Circut three and
four are simple Bi-Polar H-Bridge circuits. The bridges are controlled by a
pair of LM311 voltage Comparators. The LM311 Voltage Comparator has several
unique features, one of which is an output transistor with an open emitter
as well as the typical open collector....[from Rob Paisley's Model Train web
site] |
|
|
|
Computer Controlled Model Train Set - (electronic circuit added 4/05)
|
|
Controlling Circuits For LM555 Timers - 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] |
|
Cross Canceling For Monostable Timers - 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] |
|
Crossing Bell Ringer Circuit - This circuit is a driver for a mechanical -
Grade Crossing Bell Ringer - that was originally built for the London Model Railroad
Group. [from Rob Paisley's Model Train web site] |
|
Crossing Flasher Circuit - The circuit uses a bidirectional time delay that
staggers the gates and lights so that they operate as would be seen at a typical
crossing. [from Rob Paisley's Model Train web site] |
|
Current Limiting Resistor Calculator - 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. [from Rob Paisley's Model Train
web site] |
|
Current Monitors (High Side ZXCT-1009) - This page shows some basic
information on - High Side Current Monitors such as the Zetex - ZXCT-1009 integrated
circuit. [from Rob Paisley's Model Train web site] |
|
Current Regulators For Light Emitting Diodes - The following are current
regulator circuits that can be used to drive light emitting diodes. As always, take
time to do some testing before attempting to use these circuits in actual
applications…. [from Rob Paisley's Model Train web site] |
|
Current Vs. Voltage For Various Automotive Lamps - Circuit for model
railroad trains…. [from Rob Paisley's Model Train web site] |
|
D - Flip-Flop Made With A LM556 Timer - 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] |
|
Day & Night Infrared Detection - The following is a method to allow day and
night detection using Infrared/Visible light sensitive phototransistors and a simple
LM339 voltage comparator circuit. [from Rob Paisley's Model Train web site] |
|
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. (electronic diagram added 11/06) |
|
DCC - Zero Stretching Simulator (LM555) - This circuit is designed to
simulate the 'Zero Stretching' function of Digital Command Control systems used by
model railroads. This circuit was used drive the booster while testing the
operation of block occupancy detectors and DCC signal failure circuits while in the
zero stretching mode....Circuit for model railroad trains…. [from Rob Paisley's Model
Train web site] |
|
DCC Ammeter (ZXCT1009) - The circuit shown on this page allows inexpensive
digital multimeters to measure currents in DCC systems. The 2010 circuit is designed
to use a 20 milliamp DC milliammeter to monitor the current but other types of meters
could also be used with this circuit. [from Rob Paisley's Model Train web site] |
|
DCC Booster - 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] |
|
DCC To DC - Accessory Power Supplies - Circuit for model railroad trains….
[from Rob Paisley's Model Train web site] |
|
DCC To DC Power Supplies For Accessory Circuits - Circuit for model railroad
trains…. [from Rob Paisley's Model Train web site] |
|
DCC Waveforms and Voltage - This page attempts to show the voltage waveforms
associated with model railroad DCC systems as they would be seen with an oscilloscope.
Also methods of measuring DCC system voltages and currents are shown. [from Rob
Paisley's Model Train web site] |
|
Delayed Re-Triggering - 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] |
|
Detection for Day & Night - The following is a method to allow day and night
detection using Infrared/Visible light sensitive phototransistors and a simple LM339
voltage comparator circuit. [from Rob Paisley's Model Train web site] |
|
Diagrams And Schematics For My MiniDCC© System - This page shows schematics
and diagrams for a MiniDCC© system that was built for my personal use. [from Rob
Paisley's Model Train web site] |
|
Digital Speed Control for RC Car - DC motor PWM controller that takes the1ms
to2ms pulse from the RC receiver and converts it into a PWM train at1Khz (added 6/06)
|
|
Digital speed control with BEC - A digital speed control with BEC
(electronic design added (11/06) |
|
Diode Type Constant Lighting Circuits - Circuit for model railroad trains….
[from Rob Paisley's Model Train web site] |
|
Discrete Version Of The LM3909 Oscillator IC - This page features a
replacement circuit for the LM3909 LED Flasher / Oscillator. The replacement circuit
uses discrete components and is essentially the same as the internal circuit of the
LM3909. [from Rob Paisley's Model Train web site] |
| Downed Model Locator - The circuit draws 1mA
(!) when idle and 4 mA when buzzing. I've been using large peizo buzzers (see part
numbers below) because they are light and loud, and the 6 volt electromagnetic
buzzer where weight is not so much of a concern.. [Site is under construction right
now] |
| Downed Model Locator II - Here is another
device to help you locate your downed R/C sailplane in the bushes and weeds.
Similar to the other design, this circuit plugs into a spare servo socket on your
receiver, and it is a pulse omission detector. The alarm sounds when pulses
originating from your transmitter are no longer being received--turn off your
transmitter to turn on the ….... |
|
Driving Loads Of Greater Than 15 Volts - 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] |
|
Dual Alternating Flashing Light Circuit - (circuit diagram added 05/06/07)
|
|
Dual Tandem Flashing Light Circuit 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....(circuit added
05/06/07) |
|
Dual-Transformer Type Block Occupancy Detector-VT-5 - This block occupancy
detection circuit uses a current sense transformer to isolate the detector circuit
from the track power circuit. The output section of the circuit takes its power from
an external power supply and uses a LM555 timer to provide the release time delay and
both an Open Collector and Bipolar output each detector. [from Rob Paisley's Model
Train web site] |
|
|
