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Model Airplane Hobby Circuits
Model Circuits     Model Train Circuits

 

Last Updated: October 18, 2017 05:04 AM

Circuits Designed by Dave Johnson, P.E. :

Model Airplane Wing Tip FlasherThe 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 . . . Hobby Circuit designed by David Johnson P.E.-October, 2009


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

1-Chip Builds Tiny Aircraft Receiver -  09/25/97 EDN-Design Ideas It's easy to become bored spending time in airports.  After all, you can do only so much work on a notebook computer with no reference material around.  So, relax and have some fun at the airport--build the tiny, single-chip, aircraft-band radio in __ Circuit Design by Steve Hageman, Hewlett-Packard, Santa Rosa, CA

50 Amp Model Motor Speed Controller-with Brake -  It fits in a tiny plastic case, can handle motor currents up to 50A and is compatible with existing radio control gear.__ SiliconChip

9V Backup Power for R/C Aircraft -  For Large Aircraft __ Designed by Tony van Roon  VA3AVR

A High Speed NiCd Charger for Electric R/C -  A few years back, I published a design for a Low Cost Thermal Peak Detection Charger.  Since then, I've designed several other chargers, in my ongoing quest to avoid having to spend money.  Of course, in building all these designs, I've probably spent more than a really good commercial charger would have cost me.  But designing and building is half the fun __ Designed by Stefan Vorketter

A Low Cost Thermal Peak Detection NiCd Charger -  The electric model aircraft and car industries have produced a bewildering array of field chargers for NiCd motor battery packs.  These range from simple 6 or 7 cell chargers consisting of a resistor and mechanical timer, to more complex chargers with peak detection, cycling, and the ability to handle 36 cell packs __ Designed by Stefan Vorketter

A 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 __ Designed by Stefan Vorketter

Analog Bar Graph Expanded Scale Voltmeter -  An expanded scale voltmeter    (ESV) can save your plane.  That may be a strong statement, but it's true.  The crucial radio link that lets you control your plane relies on nickel-cadmium    (NiCd) batteries in the transmitter and receiver __ Designed by Stefan Vorketter

Angelfire rocket GPS payloA - D -  Angelfire now carries a GPS radio downlink system in the nosecone.    It transmits GPS    (Global Positioning System) coordinates to a base station for use in recovering the rocket, as well as providing detailed flight information like altitude, velocity and range.    My particular implementation __ Designed by Vern Knowles

Autopilot: Do it Yourself UAV -  This board has actually flown the helicopter on its own! You can see flight details in kahn.20020922.  Joe Easly made movies of it hovering under software control.  

BattMan II: a Computer Controlled Battery Manager -  BattMan II is a computer controlled battery manager, intended for typical rechargeable batteries used by R/C and electronics hobbyists, as well as various consumer product batteries.   __ Designed by Stefan Vorketter

Build a High Speed NiCd Charger for Electric R/C -  A few years back, I published a design for a Low Cost Thermal Peak Detection Charger.  Since then, I've designed several other chargers, in my ongoing quest to avoid having to spend money.  Of course, in building all these designs, I've probably spent more than a really good commercial charger would have cost me.  But designing and building is half the fun __ Designed by Stefan Vorkoetter

Build a 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 __ Designed by Stefan Vorketter

Chute Control Model Rocket -  Circuit + Parts List + Notes __ Designed by Tony van Roon  VA3AVR

Direction Finder SystE - M -  Similar to the system used in modern aviation where an antenna array modulates the phase of an incoming signal.  The commercial system is known as Commutated Aerial Direction Finding  (CADF) where a ring of 18 identical antennas are each switched on in sequence, just like winding a rotary switch round and round so that one antenna is always connected to the receiver.   __ Designed by Harry Lythall-SM0VPO

Electric Powered Model Aircraft Pt.2 -  Our first article in the February 2006 issue showed the potential of the electric Piper Cub model aircraft.  This month we continue our investigation by converting the Cub to a brushless motor to obtain a greatly improved result.__ SiliconChip

Electronic Speed Controller for R/C Models -  Here's how you can make an electronic speed controler  (ESC) for your remote control car, boat or even an airplane using an old servo and some MOSFETS

Getting the Most from Your Radio Control SystE - M -  About a year after the maiden flight, I wanted to get into electrics, so I bought a Great Planes Spectra.  I figured I'd just buy another receiver and three servos.  WRONG! I found out that it would be cheaper to buy another transmitter, receiver, and three servos __ Designed by Stefan Vorketter

High Speed NiCd Charger for Electric R/C -  A few years back, I published a design for a Low Cost Thermal Peak Detection Charger.  Since then, I've designed several other chargers, in my ongoing quest to avoid having to spend money.  Of course, in building all these designs, I've probably spent more than a really good commercial charger would have cost me.  But designing and building is half the fun __ Designed by Stefan Vorketter

High-Rate Electronic Speed Control 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) .   __ Designed by Stefan Vorketter

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 __ Designed by Stefan Vorketter

Hot Wire Foam Cutter -  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  __ Designed by Damon Kohler

Hot-Wire Foam Cutter -  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  __ Contact: Charles Wenzel of Wenzel Associates, Inc.

Hot-Wire-Foam Cutter -  Transformer T1 rectifies the 18 to 22 Volts AC via the bridge rectifier  (BR1) to about 26 or 32 Volts DC.  T1 is a regular type without "CT" or center-tap.  If your transformer is above 22VAC, you need to modify the circuit to protect the LM350K from over-voltage  (33V max) .  Check the datasheet for more info __ Designed by Tony van Roon  VA3AVR

LED Bargraph Optical Tachometer -  For the electric R/C enthusiast, a tachometer can be a very useful piece of equipment.  When I first built this tach back in 1995, it was essential, as there were very few off-the-shelf electric R/C power systems that just worked.   __ Designed by Stefan Vorketter

Low Cost Thermal Peak Detection Charger -  The electric model aircraft and car industries have produced a bewildering array of field chargers for NiCd motor battery packs.  These range from simple 6 or 7 cell chargers consisting of a resistor and mechanical timer, to more complex chargers with peak detection, cycling, and the ability __ Designed by Stefan Vorketter

M/model-airplane.htmPAGE 2

Miniature High-Rate Speed Control with BEC -  My first Speed 400 powered plane was the Sydney's Special, an 80% scaled down version of Vernon Williams' Fred's Special, as published in the November 1991 issue of Model Airplane News.  I chose this project because I was really happy with my original-size 46" Speed 600 powered Fred's Special.  The scaled down version has a 37" __ Designed by Stefan Vorkoettert

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

Mini-Contoller -  Speedcontrollers for Model-Aircrafts with BEC

Model Aeroplane Navigation Strobe/Battery Level Indicator  -  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 __ Contact: r dot p @ webone.com.au

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 . . . Hobby Circuit designed by David Johnson P.E.-October, 2009

Model rocket launch controller -  The secrets to a successful launch controller are thick cables, power through a relay, and a beefy battery  (such as a lead-acid motorcycle battery) .  Learn what is inside a low-end commercial rocket launcher, how to make your own simple launch controller, and take a look at a fancy rocket controller that includes covered pilot switches and a switch lock.   __ Contact: David Cook

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 __ Designed by Andy Collison

Model Rocket Launcher -  A schematic diagram of the Time Delayed Launch Control is shown in Fig.1.  The circuit which gives a choice of 6 day settings is comprised of three 555 timer/oscillators  (U1, U2, and U3) . __ Designed by Tony van Roon  VA3AVR

Model Rocket Strobe -  Launch a model rocket on the darkest night and find it in a flash no matter where it lands! __ Designed by Anthony Charlton

Multi Launcher for Model Rockets -  This launch controller can be used with low voltage battery igniters, which fire rocket engines in model rockets such as the Estes range.  These circuits are electrical, only switches and contacts are involved.  First the circuit for a single rocket.   __ Designed by Andy Collison

One ounce rocket ejection timer -  This page describes the how to build a very small  (1.5"x1.5", ~1 oz.) rocket ejection timer.  I have tired to give as complete of instructions as possible, but you still might encounter problems.  While it is possible to build this timer without printing a custom circuit board, I don't recomend it.  In the past I __ Designed by Jonny Dyer

Phase Shift Radio Direction Finder -  Similar to the system used in modern aviation where an antenna array modulates the phase of an incoming signal.  The commercial system is known as Commutated Aerial Direction Finding  (CADF) where a ring of 18 identical antennas are each switched on in sequence, just like winding a rotary switch round and round so that one antenna is always connected to the receiver.   __ Designed by Harry Lythall-SM0VPO

Plane Motor Controller with High-Rate ESC, 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) .   __ Designed by Stefan Vorketter

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 separate 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

R/C Model Aircraft Marker Light Flasher  (ATTINY12 & others) -  The lightest weight solution I could come up with, uses just about any AVR controller.  You can even do it with a PIC! __ Designed by Dick Cappels

Rocket Ignition SystE - M -  The problem with most model rocket launch controllers is that the battery is located with the operator, far away from the launch pad.  This requires thick cables and wastes significant energy.  By locating the battery near the rocket engine and using a remotely-controlled relay, the improved launch system is more efficient but can still be built at home.  Includes complete schematics, the pcb layout, and source/object code.   __ Contact: David Cook

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 

Single Chip Builds Tiny Aircraft Receiver -  09/25/97 EDN-Design Ideas It's easy to become bored spending time in airports.  After all, you can do only so much work on a notebook computer with no reference material around.  So, relax and have some fun at the airport--build the tiny, single-chip, aircraft-band radio in __ Circuit Design by Steve Hageman, Hewlett-Packard, Santa Rosa, CA

Speedy-2 -  6 10 Cells / 40 A Speedcontrollers for Model-Aircrafts

Speedy-3 -  Speedcontrollers for Model-Aircrafts with optocoupler

Speedy-BL -  Speedcontrollers for Model-Aircrafts controller for brushless and sensorless motors

The Battery Eliminator -  The Battery Eliminator Circuit, or BEC, is one of the tools at our disposal to reduce weight in our electric models.  A typical four-cell 600mAh nickel cadmium  (NiCd) battery supplied.   __ Designed by Stefan Vorketter

Thermal Peak Detection Charger -  The electric model aircraft and car industries have produced a bewildering array of field chargers for NiCd motor battery packs.  These range from simple 6 or 7 cell chargers consisting of a resistor and mechanical timer, to more complex chargers with peak detection, cycling, and the ability __ Designed by Stefan Vorketter

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) .   __ Designed by Stefan Vorketter


Model Airplane Hobby Circuits

 


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