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Last Updated: December 29, 2017 03:15 AM

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

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

Three axis robot arm - Circuit for three axis robot arm based on stepper motors out of 5 1/4" drives

Top RC-Gun - This is our original R/C aerial combat system. Simple one-IC construction. Please note that it has been replaced by the Top RC-Gun AWS project  (see link above) . __ Designed by T. Black

Top RC-Gun AWS - This fun R/C aerial combat system lets you command your own dog fight missions. It is based on the HobbyZone Combat module. __ Designed by T. Black

Toy Car Hack - This car measures just 5 1/2 inches in length.  It was sold as a remote control car for $19.95 at Fry's Electronics here in Phoenix.  Powered by 4 AAA batteries, it has a small dc motor and a very interesting steering mechanism.   (08/08/08)  __ Designed by Luhan Monat - Mesa Arizona

toy car receiver - Schematic only __ Designed by Peter Jakab

toy car transmitter - Schematic only __ Designed by Peter Jakab

Track Cleaner - Schematic + Info + pictures __ Designed by Lennie Zink

Track Your Rocket - Tired of losing things? Build your own radio locator. __ Contact: Jameco Electronics

Traffic Light - Our TRAFFICER - GYR3 has many applications;.  Mount the TRAFFICER on your toy train-tracks for signaling.  Place TRAFFICER anywhere you’d like to draw attention and a smile.  The unique small design will allow you to mount it almost anywhere.  Operates with 9V battery, 12V car battery, four 1.5V batteries, or via one of our battery simulator kits.   __ Contact: Kit from Elich Industrial Development, Corp

Traffic Light - A two-way traffic light using a CMOS 4017 and 555.  To be used as toy only __ Designed by Jose Pino

Traffic Light - This project operates red, amber and green LEDs in the correct sequence for a single UK traffic light.  The time taken for the complete red, red & amber, green, amber sequence can be varied from about 7s to about 2˝ minutes.  A 4017 counter is used to produce the traffic light sequence and this project could be adapted __ Designed by John Hewes

Traffic Light 2 - A two-way traffic light using a CMOS 4017 and 555.  To be used as toy only __ Designed by Jose Pino

Traffic Light Controller - Controls on3 LED traffic light sequence __ Designed by rstevew@armory.com

Traffic Light Timer - The 555 timer IC is connected for Astable Operation, the clock pulses are fed to the 4017 IC via the 10K resistor.  The 4017 is a 10 stage counter, therefore the sequence of the traffic lights is spread over 10 clock pulses, 4on red, 1 on red & amber, 4 on green and 1 on amber __ Designed by Andy Clarkson

Train Detector using Ambient Light & a Photocell - This photocell is best mounted at tie level between the rails.  The variable resistor adjusts the sensitivity of the circuit.  This circuit can be powered by either 6 or 12 volts - BE SURE to use the proper relay; note that some relays are rated for 5 volts, these should be okay with 6 volts.
 __ Designed by ML Rollins

Tunnel Stretcher - Do you find your tunnels a bit short? Does the train pop out of the far end moments after the last coach disappears from view?This module will automatically add some time to the train's trip through the tunnel.  It can also be used to control signals at stations, making a train wait for a predetermined time before letting it continue __ Contact: Collin Mitchell

Two Watt Switching Power Supply - In this small switching power supply, a Schmitt trigger oscillator is used to drive a switching transistor that supplies current to a small inductor.  Energy is stored in the inductor while the transistor is on, and released into the load circuit when the transistor switches off.  The output voltage is dependent on the load resistance and is limited by a zener diode that stops the oscillator when the voltage reaches about 14 volts.  Higher or lower voltages can be obtained by adjusting the voltage divider that feeds the zener diode.  The efficiency is about 80% using a high Q inductor.   __ Designed by Bill Bowden

Two-LED Pilot Light - 230 or 115 Vac mains operated Very simple circuitry __ Contact: Flavio Dellepiane, fladello @ tin.it

Two-Tone 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 __ Contact: Flavio Dellepiane, fladello @ tin.it

Two-Tone Train Horn - With this circuit you can electronically simulate the noise of a diesel-train horn.  The sound is triggered automatically as the train reaches a desired place on the track so you can produce the sound as the train approaches stations, level crossings, etc.  The circuit can be built simply by using one 556 or two 555 timers __ Designed by Tony van Roon  VA3AVR

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

Voltage Regulators - Learn how to create a DC-DC Regulated Switching supply for your wireless video transmitter and camera. Cost is under $10! __ Designed by T. Black

Wire guidance sensor - When I visited Legoland Deutchland, I wondered how vehicles circulating in Miniland were guided.  Though I don't know the exact method used by Lego, I figured out that they could use inductive guidance.  And I began experimentations to create an RCX wire guidance sensor.. __ Designed by Philippe "Philo"Hurbain

XCam-Ant - Construct a simple pre-amplified ground plane Rx antenna. This project is for folks with experience in building UHF/Microwave antennas. __ Designed by T. Black

XCam-FSM - Add a signal strength meter to your XCam receiver. A digital display tells you the relative signal strength of the received video broadcast. __ Designed by T. Black

Models:  #'s - B        C - G      H - L      M - Q      R - S      T - Z

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