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Matrix Systems For Stall-Motor Switch Machines information - The driver circuits
themselves use LM556 dual timer chips to reverse the polarity of the voltage to the
switch machine motors. |
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Maxi speed control with brake - A "maxi" speed control with brake (circuit added
11/06) |
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Miniature high-rate speed control - A miniature high-rate speed control published
in the newsletter published by Electric Model Flyers' of Southwestern Ontario (diagram
add |
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Miniature High-Rate Speed Control with BEC - (circuit added 11/06) |
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Miniature High-Rate Speed Control with Brake - Many designs for high-rate speed
controls have been published. Most require two 8-pin integrated circuits ( ICs) or one
14-pin IC. Many designs suitable for home construction are fairly large (some as large
as 2" square). Many do not include a brake.... (electronic construction project added
09/06) |
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Miniature Lighthouse Light Simulator - The circuit I came up with is shown below.
It uses two dual low power op amps. The first two devices form a classic oscillator
circuit whose output is a triangle waveform signal. That signal is routed to a
current regulator circuit, which converts the triangle voltage signal to a triangle
current signal through the lighthouse LED. A third op amp generates pulses timed so
they occur at the peak of the triangle waveform. The result is a LED, which gradually
grows brighter, then flashes even brighter before dimming again. This should produce a
light, which simulates a rotating lighthouse light. ….(designed by David A. Johnson) |
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Miniature low-rate speed control - A miniature low-rate speed control published in
the newsletter published by Electric Model Flyers' of Southwestern Ontario (diagram
added 11/06) |
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MiniDCC© System - This page shows schematics and diagrams for a MiniDCC© system
that was built for my personal use…..(added 07/07/07) |
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MiniDCC© System information - This page features schematics and diagrams that are
for use with the MiniDCC© system., A DCC ( Digital Command Control) do-it-yourself
project.... |
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Miscellaneous Signals information - Some simple signals circuits that do not have
pages of their own. |
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Model Aeroplane Navigation Strobe/Battery Level Indicator - Fair Waring, site
contains annoying popups. If you are interested in model aeroplanes and have the
capital, a radio controlled electric park flyer is a must have. An RC aeroplane under
400 grams floats around like the rubber models of my youth and contact with the ground
doesn't seems to involve that sickening crunch ....(design added 5/05) |
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Model Railroad Odometer Car (1994 M.R. Magazine article) - This page features a
photo and schematic from an article that was published in the August 1994 issue of
Model Railroader Magazine. The article was titled "Build a model railroad odometer
car". The Car shows the distance a train travels on a 5 digit LCD display. The
distance is indicated down to 1/100th of a mile (about the length of a 50 foot car)
with an accuracy of approximately plus 2 percent using a standard 33 inch freight car
wheel....(schematic added 06/07/08) |
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Model Railway Level Crossing Lights - The level crossing warning lights are
switched on automatically as a train approaches. First an amber light shows, then two
red lights flash until the train has passed the crossing.....Designed by John Hewes
(circuit added 06/07/08) |
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Model Railway Signal - This signal is controlled automatically by a passing train
fitted with a magnet. It can also be manually set to red or green by pressing the
switches. Trains will automatically stop at the red signal.....Designed by John Hewes
(circuit added 06/07/08) |
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Model rocket launch Controller - Most commercial rocket controllers available to
buy are either expensive or do not have many features. After a lot of searching I
found nothing that met my needs. I wanted a controller that could work multiple pads,
as well as being easy to set up and pack away, so I designed my own. It has the
ability to control up to 8 pads through a 6 core cable. You may(electronic circuit
added 4/05) |
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Model Rocket with Video Camera - (electronic circuit added 4/05) |
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Model Train Diesel & Horn Sound Module - TIL 112 opto isolator, 741, LM566 VCO,
CD4017 CMOS counter, LM386 power amplifier, LM556 dual timer (electronic circuit
added 4/05) |
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Multi Launcher for Model Rockets - (electronic circuit added 4/05) |
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My MiniDCC© System information - This page shows schematics and diagrams for a
MiniDCC© system that was built for my personal use. |
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Not as Simple Signals - (electronic circuit added 4/05) |
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Occupancy Detector Information - In these circuits a transformer is used to
isolate the detector circuitry from the track power circuit. |
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On/Off Motor Control with Brake - circuit design added 11/06) |
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One IC 2 Tones Siren Double Tone Police Sound Single Tone Old Ambulance Sound -
This circuit is intended for children fun, and is suitable to be installed on
bicycles, battery powered cars and motorcycles, but also in models and other games.
With SW1 positioned as shown in the circuit diagram it reproduces the typical dual
tone sound of Police ....(added 4/05) |
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One ounce rocket ejection timer - (electronic circuit added 4/05) |
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One-IC two-tones Siren - This circuit is intended for children fun, and is
suitable to be installed on bicycles, battery powered cars and motorcycles, but also
in models and other games. With SW1 positioned as shown in the circuit diagram it
reproduces the typical dual tone sound of Police....added 4/05) |
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Optoisolator Block Occupancy Detector - (electronic circuit added 4/05) |
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Optoisolator Block Occupancy Detector information - This page is about a block
occupancy detector that uses an optoisolator to electrically separate the track from
the detector output. Four variations of the detector are shown. |
