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Model Airplane Hobby
Circuits #'s - GH - KL - OP - Z Last Updated on:
Monday, October 03, 2011 06:07 PM
Circuits Designed
by Dave Johnson, P.E. :
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.
Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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....[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....[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....[Stefan Vorketter]
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)
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… [Stefan Vorketter]
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…. [Stefan
Vorketter]
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…. (electronic design added 11/06)
Getting the Most from Your Radio Control System - 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....[Stefan
Vorketter]
