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Model Circuits     Page 11
Model Airplane Circuits     Model Train Circuits
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Last Updated on: Wednesday, December 20, 2017 05:05 AM
 


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
Team digital - SCR16 - Twin Coil Switch Machine Adapter -  Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
Test Bench Power Supply -  The next circuit is a classic on every LM317 datasheet. It's simple, reliable and….Scroll down for this design....Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
The Basic Throttle -  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]
The Battery Eliminator Circuit -  The Battery Eliminator Circuit, or BEC, is one of the tools at our disposal to reduce weight in our electric models. A typical four-cell 600mAh nickel cadmium (NiCd) battery supplied…. [Stefan Vorketter's web site]
Three Stage Cycling Timer Circuit (Traffic Light Circuit) -  Uses the LM555 timer or its cousins with other letter prefixes. There can be minor differences…. [from Rob Paisley's Model Train web site]

Three Terminal Regulator Type Throttle LM350K -  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]
Throttle Power Supply 1 -  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]
Throttle Power Supply 2 -  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]
Time Delay Circuits -  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]
Timed DC Throttle -  The following is a simple timed DC throttle that has controls for the length of run, accelerate/ decelerate and the maximum train speed. The circuit also has automatic current limiting....Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
Timed Uncoupling Ramp Driver (LM555) -  Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
Tiny RC Cars TX and Charger -  The transmitter runs on only 3V whereas most others run on more voltage.  This dirt cheap item uses non-adjustable inductors so it is not possible to tweak for higher output. The common TX2B chip is manufactured by HIGHLAND (SHENZHEN) ELECTRONICS CO LTD and by REALTEK SEMICONDUCTOR CORP and others. (added 2/05) [Reverse engineered schematic by Stepan Novotill]
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Toggle Switch Control -  This circuit allow an ON-ON type DPDT toggle switch to control a single coil switch machine motor such as those made by Kato®. The handle of switch can then be used to indicate the route selected. The circuit is also able to control LEDs that could be used to indicate the selected route. [from Rob Paisley's Model Train web site]
Toggle Switch Control information -  These circuits allow an ON-ON type DPDT toggle switch to control a twin coil switch machine motor. The handle of switch can then be used to indicate the route selected. The circuits are also able to control LEDs that could be used to indicate the selected route. [from Rob Paisley's Model Train web site]
Toggle Switch Control Of Single Coil Switch Machines -  This circuit allow an ON-ON type DPDT toggle switch to control a single coil switch machine motor such as those made by Kato&reg. The handle of switch can then be used to indicate the route selected. The circuit is also able to control LEDs that could be used to indicate the selected route. [from Rob Paisley's Model Train web site]
Toggle Switch Control Of Twin Coil Switch Machines -  These circuits allow an ON-ON type DPDT toggle switch to control a twin coil switch machine motor. The handle of switch can then be used to indicate the route selected. The circuits are also able to control LEDs that could be used to indicate the selected route. [from Rob Paisley's Model Train web site]
toy car receiver -  ….(design added 04/09) [Peter Jakab, Electrical Engineer, Engineer of Informatics]
toy car transmitter -  ….(electronic schematic added 04/09) [Peter Jakab, Electrical Engineer, Engineer of Informatics]
Toy Throttle with Zero Indication -  The above schematic shows the addition of a "Zero Indicating" circuit to the throttle. When the output voltage is between +0.7 and -0.7 Volts both of the LED's, D3/4 will be OFF. As the output voltage increases, either PLUS or MINUS, one of the LED's will turn ON....scroll down to find this circuit....[from Rob Paisley's Model Train web site]
Traffic Light -  A two-way traffic light using a CMOS 4017 and 555. To be used as toy only… [Jose Pino]
Traffic Light -  This project operates red, amber and green LEDs in the correct sequence for a single UK traffic light. The time taken for the complete red, red & amber, green, amber sequence can be varied from about 7s to about 2½ minutes. A 4017 counter is used to produce the traffic light sequence and this project could be adapted....[John Hewes]
Traffic Light 2 -  A two-way traffic light using a CMOS 4017 and 555. To be used as toy only… [Jose Pino]
Traffic Light Control Circuit (20 Output Sequencing Circuit) -  This page features a circuit that has twenty open collector outputs that turn on one at a time in a continuous sequential manner. The circuit make use of the 74LSxx family of TTL integrated logic devices. The circuits are designed to drive light emitting diodes or low current, low voltage incandescent lights but can also drive other loads of up to 80 milliamps…. [from Rob Paisley's Model Train web site]
Traffic Light Control Circuit 74145 -  This page features a circuit that has twenty open collector outputs that turn on one at a time in a continuous sequential manner. The circuit make use of the 74LSxx family of TTL integrated logic devices. The circuits… [from Rob Paisley's Model Train web site]
Traffic Light Controller -  controls on3 LED traffic light sequence (added 4/05)
Traffic Light Timer -  The 555 timer IC is connected for Astable Operation, the clock pulses are fed to the 4017 IC via the 10K resistor. The 4017 is a 10 stage counter, therefore the sequence of the traffic lights is spread over 10 clock pulses, 4on red, 1 on red & amber, 4 on green and 1 on amber....
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. [from Rob Paisley's Model Train web site]
Train Detector using Ambient Light & a Photocell -  (electronic circuit added 4/05)
Train Mounted Camera Battery Charger -  This circuit will keep the battery for a train mounted camera charged and will shut the camera off after a few seconds when power is no longer applied to the track… [from Rob Paisley's Model Train web site]
Transformer Secondary Voltage Reduction -  This page uses bridge rectifiers to reduce the secondary voltage of transformers. The current rating of the bridges should be about 1.5 times the maximum current expected.….Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
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]
Transformer Type-DCC Block Occupancy Detectors -  In these circuits a transformer is used to isolate the detector circuitry from the track power circuit. [from Rob Paisley's Model Train web site]
Transistor Throttle Circuits -  This page will show a number of variations on transistor type throttles. The throttles range from 'tried and true' types to 'experimental' designs.  The basic transistor throttle serves as a base to which other circuits are added. [from Rob Paisley's Model Train web site]
Triggering And Timing Helpers 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]
Turnout Anti-Derail Protection -  The circuits presented here will prevent turnouts from being thrown while a train is on the switch, ideal where the switch cannot be seen by the operator. They use phototransistor sensors to detect the train and have a short time delay to compensate for gaps between cars. The circuit can also be used to protect crossovers and ladder tracks with the addition of more sensors. [from Rob Paisley's Model Train web site]
Twin Coil Switch Machine-Automatic Reversing Loop Circuits -  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. [from Rob Paisley's Model Train web site]
Two-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.  The rest of the parts are readily available and not critical.  The output....[Tony van Roon's circuit]

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