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A miniature high-rate speed control: A miniature high-rate speed control
published in newsletter published by Electric Model Flyers' of Southwestern
Ontario (diagram add |
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A miniature low-rate speed control: A miniature low-rate speed control
published in newsletter published by Electric Model Flyers' of Southwestern
Ontario (diagram added 11/06) |
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AN847: RC Model Aircraft Motor Control: Microchip Application Note Published
18-Jul-02 (app note added 2/06) |
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Analog Bargraph Expanded Scale Voltmeter: (electronic design added 11/06) |
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Electronic Speed Controler for R/C Models: Here's how you can make an
electronic speed controller (ESC) for your remote control car, boat or even an
airplane using an old servo and some MOSFETS…. (electronic design added 11/06) |
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High Speed NiCd Charger for Electric R/C: (schematic added 11/06) |
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Hot Wire Foam Cutter #1: Foam cutting is a relatively simple process once
you have the required tools and an acquired level of experience. So once you are set
up, don't be discouraged if you butcher a couple blocks of foam. You'll soon get use
to the rhythm, and your cores will turn out nice and smooth.... (added 2/06) |
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Hot Wire Foam Cutter #2: After seeing other modelers building their model
wings from plastic foam, I decided that I wanted to do the same. Building your wings
from foam covered with 1/16 in. balsa can produce a strong and light wing that could
be difficult to duplicate with the standard balsa rib construction, specially if the
wing had a duel tapered, symmetrical airfoil. The standard way to cut foam is with the
Hot Wire technique, using steel or nichrome wire through which an electrical current
flows to heat the wire. However, the methods that many use to get the wire hot leaves
something to be desired. The most common method I saw used was to connect a 12volt
battery charger to 4 or 5 feet of nichrome wire which was tied to some kind of a bow.
Using the variable charging rate, you could control (to a limited degree) the
temperature of the wire... (added 2/06) |
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Hot Wire Foam Cutter #3: Here is a homebuilt foam turning lathe!! This is
made from a window motor adapted and appropriately painted for the application. The
pillow blocks that the rotating shaft bear in were made from foam patterns and cast
using the above mentioned techniques. The two dials on the electrical box are light
dimmers with simple numerical 10 through 100 markings for remembering settings. One is
for the wire heat, the other controls motor speed. The object that is being turned on
the lathe is a step pulley pattern. The picture below shows a similar pattern and a
resulting pulley casting!... (added 2/06) |
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Hot Wire Foam Cutter #5: Hot wire foam cutters are a must when working with
polystyrene foam because they make neat, straight and smooth cuts that simply cannot
be duplicated with any other type of saw. Most cutters are hand-held devices looking
much like a cheese cutter without the roller and operate a bit like a jig saw. The
foam cutter described here is more like the "table saw" version of hot wire cutters
featuring a large work surface with plenty of clearance on all sides and with generous
height for cutting thick pieces.... (added 2/06) |
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Hot Wire Foam Cutter #6: Hot wire foam cutters are used by hobbyists of all
stripes to contour Styrofoam into a vast array of shapes for a wide variety of uses.
Model railroad builders shape foam into landscapes. RC plane builders shape foam into
aircraft wings and fuselages. Stagehands shape foam for theatrical sets and props. And
because Fiberglas can be applied over the shaped foam to create a rugged and
lightweight structure, rocket builders can shape foam for use as nose cones or
airframes.... (added 2/06) |
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Hot Wire Foam Cutter #7: The power supply I used is a little more involved
than what is required but it works well and I had the pieces. I used a PWM (Pulse
Width Modulator) to control the heat to the wire. This is a simple electronic control
that essentially turns the power to the wire on and off very fast and you can control
this rate. I used a 12.6 volt, 3 amp transformer to provide the power, a bridge
rectifier to convert the AC power to DC power, and a large capacitor to filter the DC
power.... (added 2/06) |
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Hot Wire Foam Cutter #8: I am starting a new project that requires almost
all foam work. |
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HOTCHEK: The HOTCHEK is a compact expanded scale voltmeter designed to check
the receiver battery pack. Its very small size makes it great as onboard voltage
monitor or it can be used as a "pocket meter," replacing those old fashioned bulky
meters. A 0.3A load can be placed across the batteries with a push of a button
allowing the true state of the pack to be tested (added 6/07) |
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Hot-Wire Foam Cutter, 10-by Tony van Roon: (electronic design / schematic
added 2/06) |
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LED Bargraph Optical Tachometer: (circuit added 11/06) |
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Lost Foam Casting: Lost Foam casting makes it possible to cast some parts
that would require some very intricate wood patterns. I use foam for those
types of castings. If it does not turn out, cut some more foam!
Actually, it is great for some "quick and dirty" castings as well. If surface
finish is not critical, lost foam can produce "one off" castings faster than making
wood patterns. To date, the few lost foam castings I have done all turned out as
hoped... (added 2/06) |
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Low Cost Thermal Peak Detection Charger: (electronic 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: (circuit / schematic added
11/06) |
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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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Mini-Contoller: Speedcontrollers for Model-Aircrafts with BEC (electronic
diagram added 11/06) |
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Model Airplane Wing Tip Flasher - The
circuit below is designed to flash two white LEDs mounted at the wing tips of a model
airplane. The flasher unit is powered by a 4.5v supply made of three AA or AAA
1.5v alkaline battery cells. The average current is about 2ma so a set of
batteries should last about 1000 hours of flashing. The circuit uses one hex Schmitt
trigger inverter to perform all the timing functions. A single n-channel FET drives
the two LEDs, each with a peak current of about 20ma. The circuit flashes the
two LEDs in a pattern typical of commercial airplanes. |
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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 that comes with larger
models. Finding a deserted park in which to fly one (that propellor can still be
dangerous) and waiting for a windless day isn't always that easy but it sure beats
driving an hour to a club field. Park flyers are definitely stress beaters and are
also just plain fun. (add 5/05) |
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Model rocket launch Controller: (electronic circuit added 4/05) |
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Model Rocket Launch Controller #2: 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....
(added 11/05) |
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Model Rocket with Video Camera: (electronic circuit added 4/05) |
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Multi Launcher for Model Rockets: (electronic circuit added 4/05) |
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On/Off Motor Control with Brake: circuit design added 11/06) |
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Pad launch Controller for model rockets: (electronic circuit added 4/05) |
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Phase Shift Radio Direction Finder: (electronic circuit added 4/05) |
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PIC Based rocket altimeter: (electronic circuit added 4/05) |
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Precision Digital Altimeter: The current concept incorporates a wireless
transmitter and receiver and is thought to be used for remote controlled airplanes or
appliances with two seperate parts. In other words, we have one dedicated transmitter
(acquisition, filtering) and one dedicated receiver part (user-interface, look-up
table, calibration, storage), capable of being connected together with any physical
layer, e.g. wired, wireless, infrared. If you want to build a standalone altimeter/variometer
just for hiking or mountaineering, this setup can obviously be simplified by omitting
the wireless components.... (added 4/05) |
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RC Model Aircraft Motor Control: Microchip Application Note Published
18-Jul-02 (app note added 2/06) |
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Servo Wiring Chart: After 1991 or so (I can't remember), most of the major
brands of servos became compatible with each other. You can use any of these brands of
servos with any brand of receiver. Some brands of servos are really great for a
particular use in a particular plane, and there are other companies that sell their
servos with each different manufacturer's connector installed (you just have to ask
for what you want).... (added 2/06) |
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Single Chip Builds Tiny Aircraft Receiver: 09/25/97 EDN-Design Ideas /
(added 6/06) |
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Speedy-2: 6 10 Cells / 40 A Speedcontrollers for Model-Aircrafts (electronic
circuit added 11/06) |
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Speedy-3: Speedcontrollers for Model-Aircrafts with optocoupler (schematic
added 11/06) |
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Speedy-BL: Speedcontrollers for Model-Aircrafts controller for brushless and
sensorless motors (electronic design added 11/06) |
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Versatile Miniature High-Rate ESC with BEC and Brake: electronic diagram
added 11/06) |
