Fast Acting Electronic Circuit Breakers - The circuit breakers on
this page make use of the Zetex - ZXCT-1009 "High Side Current Monitor'
integrated circuit. The circuits have variable trip current settings and are
designed for low current applications. Two circuit breaker designs are
shown; The first has its power isolation device on the Low or common side of
the circuit while the second has it isolation device on the High or supply
side of the circuit. Both designs use MOSFET isolation devices. [from Rob
Paisley's Model Train web site] |
Fast Electronic Circuit Breaker - The circuit on this page is for
a fast acting electronic circuit breaker for use with fixed and variable,
low voltage AC and DC systems such as model railroad throttles. The circuit
breaker's trip current setting has an adjustable range of 0.5 to 10 amps.
[from Rob Paisley's Model Train web site] |
Fast Electronic Circuit Breakers For AC And DC Throttles - The
circuit on this page is for a fast acting electronic circuit breaker for use
with fixed and variable, low voltage AC and DC systems such as model
railroad throttles. The circuit breaker's trip current setting has an
adjustable range of 0.5 to 10 amps. [from Rob Paisley's Model Train web
site] |
Files For The Original 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] |
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Finding Bad Joints In Track Wiring - The following is a method of finding
high resistances in track power circuits. The digital voltmeter is set to its lowest
range and indicates the resistance in the track circuit by measuring the voltage drop
in a given section of track....Circuit for model railroad trains…. [from Rob Paisley's
Model Train web site] |
Finding The Resistance Of Meter Coils - Circuit for model railroad trains….
[from Rob Paisley's Model Train web site] |
Fine Print Section for Transistor Throttles - This page will show a number
of variations on transistor type throttles. The throttles range from 'tried and true'
types to 'experimental' designs. Scroll to this one…. [from Rob Paisley's Model
Train web site] |
First Across The Line - Race Timers - Circuit for model railroad trains….
[from Rob Paisley's Model Train web site] |
First Across The Line Race Timers - The next 2 diagrams are for circuits
that indicate which phototransistors was covered first. The first is simple while the
second has an automatic reset feature…. [from Rob Paisley's Model Train web site] |
Fixed 50% Output Duty Cycle 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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Fixed Voltage Regulators - 5 or 12 Volt supply….Scroll to find this
design....Circuit for model railroad trains…. [from Rob Paisley's Model Train web
site] |
Flashing Railroad Lights - This circuit flashes two red LEDs for a model
railway crossing. |
Flashing Rear-End Device For DCC Systems - This circuit is for a "F.R.E.D."
that is designed to be used with DCC control systems. The circuit is based on the
LM555 timer chip. [from Rob Paisley's Model Train web site] |
Full and Half-Wave DC Test Throttle - The next throttle is one that was put
together for testing purposes only. As can be seen it is a modification of the basic
transistor throttle shown above. The SPDT switch allows the throttle to have a full or
half wave DC output…. [from Rob Paisley's Model Train web site] |
General Purpose - DCC Booster Circuit #2 (LMD 18200) - The second schematic
is for a 3 Amp - DCC Booster with automatic shutdowns for DCC signal failure and high
current loads. This circuit also uses the LMD 18200 CMOS, H-Bridge…. 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] |
General Purpose Block Occupancy Detector information - This page presents
block occupancy detector designed for general purpose use on systems where the
polarity of the power to the track is reversible. [from Rob Paisley's Model Train web
site] |
Grade Crossing Bell Ringer (LM555) - This is an updated version an LM555
timer based - Grade Crossing Bell Ringer - circuit that was built for the London Model
Railroad Group. The circuit drives a warning bell that is shown on the page….Circuit
for model railroad trains…. [from Rob Paisley's Model Train web site] |
Grade 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] |
Grade 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] |
Grouped DCC Block Occupancy Detectors - This page shows a successful attempt
to operate block occupancy detectors for DCC systems in a closely spaced group and
with cabled wiring. All of the detectors in this test functioned correctly with
no evidence of interference between units. The detection sensitivity of the circuit is
just under one milliamp….Circuit for model railroad trains…. [from Rob Paisley's Model
Train web site] |
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