Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


Model Circuits     Page 12
Model Airplane Circuits     Model Train Circuits
Models:  #'s        A      B      C - D      E - G      H      I - L      M - N      O - Q      R - S       T      U - Z
Last Updated on: Wednesday, December 20, 2017 05:05 AM
 


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
UNIPOLAR Stepper Motor Driver - Power Miser Version -  The main feature of this circuit is low power consumption in the motor circuit.  This is achieved by only turning on the individual outputs of the driver for 1/10th of a second for each step the motor makes. The motor only uses power when it makes a step.  This would be ideal for a battery powered system....Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
UNIPOLAR Stepper Motor Driver (74194) -  This page features simple and inexpensive, stand alone UNIPOLAR 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 1.0 amperes....[from Rob Paisley's Model Train web site]
Using "AT" Type Computer Power Supplies -  "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. [from Rob Paisley's Model Train web site]

Using 1 Transformer For 2 Throttles -  Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
Using Common Cathode Or Anode LEDs As Bipolar LEDs -  Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
Using The 555 Timer With Photocells -  This page shows three circuits for using the 555 timer IC as a photocell controlled train detector.    Scroll down for this circuit design…..Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
Using The LM555 As A Voltage Comparator Or Schmitt Trigger -  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]
Variable Period Oscillator (CD4017) -  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]
Variable Width Pulse Type Throttle -  The next schematic is for an advanced type of pulse throttle. Simply put, as the output voltage is increased by the 10K pot, a pulse is injected onto the the control voltage at the PLUS input terminal of the second LM358 OpAmp. As the control voltage increases the width of the pulse is also increased....[from Rob Paisley's Model Train web site]
[_OLD-ads-dont_upload/OLD I-ADS from web/ad-djandassoc.htm]
Various LED Blinker Circuits -  The circuit uses independent timers to flash two light emitting diodes. Any time that light emitting diode D1 is lit__light emitting diode D2 will be switched off. Light emitting diode D3 is on if both D1 and D2 are off....Circuit for model railroad trains…. [from Rob Paisley's Model Train web site]
Various Power Control 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]
Various Transistor Throttle Circuits -  The first schematic is of the Direct Current power supply for the throttles. Shown is the primary and secondary circuits and the components needed to power the throttles. As this section of the throttles uses 120 volt AC power great caution should be taken in this area. All transformers should be mounted in a fully enclosed metal cabinet and properly grounded. Transformers for multiple units could be centrally located and the low voltage AC then routed to each throttle....[from Rob Paisley's Model Train web site]
Versatile Miniature High-Rate ESC with BEC & Brake -  This electronic speed control (ESC) for brushed motors combines the features of two of my earlier designs. One was a high-rate 30A ESC with a brake, and the other a high-rate 12A ESC with a BEC (receiver battery eliminator circuit)….. [Stefan Vorketter]
Voltage Comparator -  This page will provide some basic information about voltage comparator integrated circuits and and to act as reference material for other circuits. These circuits are based on the LM339 Quad Voltage Comparator chip. [from Rob Paisley's Model Train web site]
Voltage Controlled Pulse Width Oscillator -  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]
Voltage Doubler Input  DCC Only Block Occupancy Detector -  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.  The Helper circuit uses phototransistor type light activated detectors to sense that a train is still in the block, even though the engine has left that block....[from Rob Paisley's Model Train web site]
Voltage Recorder -  The images shown on this page show circuits that can used to measure and record with a LEGO® RCX Brick that comes with the LEGO® MINDSTORMS and LEGO® ROBOLAB robotics sets [from Rob Paisley's Model Train web site]
VT-5 DCC Block Occupancy Detector -  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]
Walk Around Control for The Basic Throttle -  In the next circuit walk around control is added to the throttle. A 4 conductor, 22 Gauge stranded cable will allow the operator to move around with the 'Hand Held Controller' while the power section of the throttle remains at a fixed location…. [from Rob Paisley's Model Train web site]
Waveforms, Currents and Voltages For DCC Systems -  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]
Wire Coat Hanger Cable Guides (E+F) -  Here is a way to use old wire coat hangers to make simple and efficient wiring harness guides that can help keep your layout wiring neat and tangle free…(design idea added 05/08) 

Models:  #'s        A      B      C - D      E - G      H      I - L      M - N      O - Q      R - S       T      U - Z


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy


Copyright  January, 1998 - December, 2017     David A. Johnson & Associates.  All Rights reserved. 


 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.