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Index 94

CA4060B Timer Circuits

Published:2013/6/18 20:49:00 Author:muriel | Keyword: CA4060B, Timer Circuits

CA4060B Timer Circuits
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1 Transformer For 2 Throttles schematic

Published:2013/6/18 3:58:00 Author:muriel | Keyword: 1 Transformer, 2 Throttles schematic

1 Transformer For 2 Throttles schematic
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Bi-Colour LED Output Shifting

Published:2013/6/18 3:58:00 Author:muriel | Keyword: Bi-Colour LED, Output Shifting

Bi-Colour LED Output Shifting
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Bi-Colour LED Output Shifting Schematic

Published:2013/6/18 3:57:00 Author:muriel | Keyword: Bi-Colour LED , Output Shifting Schematic

Bi-Colour LED Output Shifting Schematic
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. (View)

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Push Button Motor Control Circuit - 3

Published:2013/6/18 3:57:00 Author:muriel | Keyword: Push Button Motor, Control Circuit

Push Button Motor Control Circuit - 3
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Push Button Motor Control Circuit - 2

Published:2013/6/18 3:57:00 Author:muriel | Keyword: Push Button Motor , Control Circuit

Push Button Motor Control Circuit - 2
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Push Button Motor Control Circuits

Published:2013/6/18 3:56:00 Author:muriel | Keyword: Push Button, Motor, Control Circuits

Push Button Motor Control Circuits
The circuits on this page are for motor controls using Push buttons and would typically be found in commercial and industrial installations. The circuits do not show the wiring of the motors themselves as this depends on the particular motor type. The type of motor also governs the number of contacts needed for the motor side of these circuits. The Relay Holding Contacts and the Interlock Contacts shown in these circuit would normally be built into the motor control relays. (View)

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DCC - Zero Stretching Simulator

Published:2013/6/18 3:55:00 Author:muriel | Keyword: DCC - Zero Stretching Simulator

DCC - Zero Stretching Simulator
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. The parts values have been calculated to give the maximum stretching length and ratio allowed for DCC systems. Complimentary outputs, A and B, are provided in order to drive the booster's output polarity stretched in both directions. (View)

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Finding The Resistance Of Meter Coils

Published:2013/6/18 3:55:00 Author:muriel | Keyword: Resistance , Meter Coils

Finding The Resistance Of Meter Coils
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High impedance Test Voltmeter Schematic

Published:2013/6/18 3:54:00 Author:muriel | Keyword: High impedance , Test Voltmeter Schematic

High impedance Test Voltmeter Schematic
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Connection Of Detectors

Published:2013/6/18 3:54:00 Author:muriel | Keyword: Connection, Detectors

Connection Of Detectors
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Timed Uncoupling Ramp Driver (LM555)

Published:2013/6/18 3:53:00 Author:muriel | Keyword: Timed Uncoupling Ramp Driver , LM555

Timed Uncoupling Ramp Driver (LM555)
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Finding Bad Joints In Track Wiring

Published:2013/6/18 3:53:00 Author:muriel | Keyword: Bad Joints , Track Wiring

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. The movable jumper is connected across individual blocks in turn in order to check each one. A high voltage indicates a bad connection. The jumper must have as low a resistance as possible to avoid false indications Two versions of the circuit are shown. Both work identically except that the second limits the current to one ampere. The tester can be connected as far back in the circuit as desired so that toggle switches are also included in the test. The diagrams show gaps in both rails although this would not normally be the case. The test will still work and might find bad rail joiners as well. (View)

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LED Blinker Circuit #4

Published:2013/6/18 3:52:00 Author:muriel | Keyword: LED Blinker Circuit

LED Blinker Circuit #4
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LED Blinker Circuit #3

Published:2013/6/18 3:51:00 Author:muriel | Keyword: LED Blinker Circuit

LED Blinker Circuit #3
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LED Blinker Circuit #2

Published:2013/6/18 3:51:00 Author:muriel | Keyword: LED Blinker Circuit

LED Blinker Circuit #2
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LED Blinker Circuit #1

Published:2013/6/18 3:51:00 Author:muriel | Keyword: LED Blinker Circuit

LED Blinker Circuit #1
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. Two versions of the circuit are shown. The second circuit uses fewer components by taking advantage of the bipolar outputs of the timers. If the supply voltage is increased a 1N4148 diode should be placed in series with light emitting diode D3. The values of the resistors should also be increased proportionately. (View)

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Timed DC Throttle

Published:2013/6/18 3:50:00 Author:muriel | Keyword: 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. An ideal power supply fo this circuit would be a AC wall adapter. This would likely be less expensive than building a power supply from scratch. The 7812 voltage regulator would not be needed if an adapter with a built in regulator is used. (View)