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Index 31

A Variable Width Pulse Type Throttle

Published:2013/6/7 21:26:00 Author:muriel | Keyword: Variable Width Pulse Type Throttle

A 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. (View)

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All-wave DC Throttle Schematic

Published:2013/6/7 21:24:00 Author:muriel | Keyword: All-wave DC Throttle Schematic

All-wave DC Throttle Schematic
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Auxiliary Output Schematic

Published:2013/6/7 21:23:00 Author:muriel | Keyword: Auxiliary Output Schematic

Auxiliary Output Schematic
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The Basic Throttle

Published:2013/6/7 21:22:00 Author:muriel | Keyword: The Basic Throttle

The Basic Throttle
The first circuit is a 2 Amp, 0-12 Volt, voltage regulator type circuit. It uses a 10K ohm potentiometer to control the output voltage and has a light emitting diode that will indicate an overload condition. A DPDT toggle switch controls the train direction. The TIP142 output transistor will need a heat sink to keep it cool and the 0.33 ohm resistor should have a 5 Watt power rating. The OPAMP is one half of an LM 358. One quarter of a LM 324 could also be used. (View)

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Toggle Switch Type Protection Circuit

Published:2013/6/6 20:57:00 Author:muriel | Keyword: Toggle Switch Type, Protection Circuit

Toggle Switch Type Protection Circuit
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Push Button Type Protection Circuit with 'SCR' Output

Published:2013/6/6 20:56:00 Author:muriel | Keyword: Push Button Type, Protection Circuit, 'SCR' Output

Push Button Type Protection Circuit with 'SCR' Output
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Push Button Type Protection Circuit with 'Relay' Output

Published:2013/6/6 20:56:00 Author:muriel | Keyword: Push Button Type, Protection Circuit , 'Relay' Output

Push Button Type Protection Circuit with 'Relay' Output
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L.M.R.G. Diamond Protection Circuit Schematic

Published:2013/6/6 20:55:00 Author:muriel | Keyword: L.M.R.G., Diamond Protection Circuit Schematic

L.M.R.G. Diamond Protection Circuit Schematic
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L. M. R. G. Diamond Protection Circuit

Published:2013/6/6 20:54:00 Author:muriel | Keyword: L. M. R. G., Diamond Protection Circuit

L. M. R. G. Diamond Protection Circuit
The original Crossing Diamond Protection circuit is used in several places on the London Model Railway Group's - O Scale layout. The first installation was at the main line and trolley crossing. In this location the main line cab operators cannot see a trolley approaching until it is just inches from the diamond. The circuit shown here is a later and simpler version of the protection circuit. Included are signal lights, these are optional but do indicate who has the diamond. (View)

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DCC BOD - Diamond Protection Circuit

Published:2013/6/6 20:54:00 Author:muriel | Keyword: DCC BOD , Diamond Protection Circuit

DCC BOD - Diamond Protection Circuit
The circuit in the first schematic is for a diamond protection circuit that used two transformer type DCC Block Occupancy Detectors. NOTE: if there is a car in the protected section but it is not drawing any current the diamond will not be protected. With photosensors, if a car is on the diamond it will be seen by the circuit at all times. The train must have detectable cars at least at both ends and the block must be as long as the longest train. (View)