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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.
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.
Links to electronic circuits, electronic schematics, designs for engineers, hobbyists,
students & inventors:
Back And Forth - Bipolar Stepper Motor Driver - This circuit was
developed as a driver for an air valve. The stepper motor was used as it
could cycle faster than a standard solenoid…. [from Rob Paisley's Model
Train web site]
Basic Circuits For The LM555 Timer - Uses the LM555 timer or its
cousins with other letter prefixes. There can be minor differences between
555 timer IC's from different manufacturers but they all should be useable
for any circuit. Designed for Model Trains…. [from Rob Paisley's
Model Train web site]
Basic Electronics For Model Railroads - This pages in this section
of the site will present basic information about electronics for Model
Railroaders. Pages will be posted with information on various components and
simple circuits that a model railroaders are likely to use in their hobby.
[from Rob Paisley's Model Train web site]
Basic Infrared Proximity Detector - The circuits on this page are for an
Infrared Proximity Detector using the Vishay Electronics TSOP4830 "IR Receiver Modules
for Remote Control Systems"….Scroll down to view all the circuits…. [from Rob
Paisley's Model Train web site]
Basic Throttle with Unplugable Walk Around Control - This page will show a
number of variations on transistor type throttles. The throttles range from 'tried and
true' types to 'experimental' designs. Scroll to this one…. [from Rob Paisley's
Model Train web site]
Basic Infrared Light Train Detection - In the circuit bellow the LED will
turn on when the infrared beam is broken. The value of the resistor R1 determines the
sensitivity of the phototransistor Q1. In most cases a value of 1 Meg or 470K ohm with
good results but every situation is different and some experimentation might be
needed....[from Rob Paisley's Model Train web site]
Battery Tester - The circuit on this page is for a rechargeable battery
tester using a LEGO® RCX Brick to gather voltage verses time data and then upload the
data to a PC using the ROBOLAB Software. [from Rob Paisley's Model Train web site]
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]
Bell Ringer - This circuit is a driver for a mechanical Grade Crossing Bell
Ringer that was originally built for the London Model Railroad Group. [from Rob
Paisley's Model Train web site]
Bipolar LED Driver - Uses the LM555 timer or its cousins with other letter
prefixes. There can be minor differences between 555 timer IC's from different
manufacturers but they all should be useable for any circuit. Designed for
Model Trains…. [from Rob Paisley's Model Train web site]
BIPOLAR Stepper Motor Driver (74194) - This page features simple and
inexpensive, stand alone BIPOLAR stepper motor driver using parts that are available
from many sources. The driver is designed for medium and low speed
applications with motors that draw up to 0.6 amperes per phase…. [from Rob Paisley's
Model Train web site]
Block Occupancy Detector Helper Circuit - This circuit would be used to hold
a BLOCK OCCUPIED condition as a train passes out of the block even if the normal
detector is not sensing a train. [from Rob Paisley's Model Train web site]
Building an RF Remote Control System - With a handful of inexpensive
components, a little creativity, and the power of PicBasic, you can build some pretty
outstanding robotics creations as Rob Arnold proves with his Ruf-Bot project….[Design
by Rob Arnold]
