There are 87 circuit schematics available. Last circuit added on Tuesday, 19 May 2015.

CircuitCategoryDate AddedOK?
Autopilot: Do it yourself UAVModelsSep 10, 2006
AVR Line Following RobotModelsMar 25, 2009
Build A Roomba Bluetooth AdapterModels 
Traffic light controller with 20-output sequencingModelsSep 10, 2006
5 Times Around CircuitModelsSep 10, 2006
Fast Electronic Circuit Breaker for Model RailwaysModelsNov 13, 2010
Automatic - Railway Grade Crossing Circuit (2008 design)Models 
Audible Train Approach Warning CircuitModelsSep 10, 2006
Across The Track Infrared DetectorsModelsSep 10, 2006
Automatic Reversing Circuit for Model TrainsModelsNov 13, 2010
Block Occupancy Detector For DCCModels 
Rail Crossing Diamond Protection CircuitModelsSep 10, 2006
Automatic Railway Grade Crossing FlashersModelsSep 10, 2006
Incline Railway Control CircuitModelsJan 01, 2003
Model Railroad Odometer CarModelsSep 10, 2006
Turnout Anti-Derail Protection CircuitsModelsSep 10, 2006
Single Traffic Light Driver CircuitModelsNov 13, 2010
Various Transistor Throttles Cicuit SchematicsModelsSep 10, 2006
Three Terminal Regulator Type Throttle (LM350K)ModelsSep 10, 2006
5 Second Ramp Generator for Locomotive Sound Card DemonstrationModels 
Adding External Meters to DC ThrottlesModels 
Grade Crossing Bell Ringer (LM555)Models 
Train Mounted Camera Battery ChargerModels 
Timed Uncoupling Ramp Driver (LM555)ModelsSep 10, 2006
DCC To DC - Accessory Power SuppliesModels 
Grouped DCC Block Occupancy DetectorsModelsSep 10, 2006
Model Railroad - Infrared Proximity SwitchModels 
First Across The Line Race Scorer CircuitsModelsSep 10, 2006
School Bus Signals CircuitModelsSep 10, 2006
LED Out Circuit For Tortoise Switch MachinesModels 
Timed DC ThrottleModelsSep 10, 2006
DCC - Zero Stretching Simulator (LM555)ModelsSep 10, 2006
A Receive Signal DecoderModelsOct 30, 2002
27MHz toy car receiver L4=9 turns, .15mm wire on 4.5mm diameter tunable ferrite coil formerModelsApr 12, 2014
Model Train Diesel & Horn Sound ModuleModelsMar 30, 2010
Hexbot robot based on a PIC including source code and circuit diagramModelsMay 16, 2010
Beam robot / insect based on a PIC16F818 microcontrollerModelsMay 24, 2010
Toy car hack to turn it into a synthetic rodentModelsMay 24, 2010
Relay interface to R/C receiversModelsMay 25, 2012
Various radio control schematicsModels 
PIC-Bot II using Microchip PIC16LF84Models 
A selection of robotics projectsModelsJun 09, 2002
Collection of BEAM robot circuitsModelsSep 01, 2009
Walking robotModelsAug 14, 2002
Locomotive signal braking moduleModels 
Simple Traffic Light ControllerModels 
Electronic millipede robotModelsFeb 21, 2005
Circuit for three axis robot arm based on stepper motors out of 5 1/4" drivesModelsNov 10, 2009
0-10V control for RC servosModelsJan 26, 2001
PC Controlled RC car construction projectModels 
Robotic microcontroller boardModelsJan 31, 2003
AVR Line Following RobotModelsMay 19, 2015
Java Bot - Simple line follower robotModelsJun 19, 2011
Acceleration Sensing - gesture controllers for robotic musical instrumentsModelsJan 09, 2010
Distance Sensing - devices for wireless distance and position determinationModelsJan 09, 2010
Doppler radar based gesture measurement system capable of delivering positional informationModelsJan 09, 2010
FailureBot 5 - A Line Following RobotModelsNov 16, 2010
Pad launch controller for model rocketsModelsJun 17, 2003
Simple flashing light circuitModelsJan 26, 2001
Simple flashing light circuitModelsJan 26, 2001
A dual alternating flashing light circuitModelsJan 26, 2001
Simple flashing light circuitModelsJan 26, 2001
A dual tandem flashing light circuit powered by a 9 volt batteryModelsJan 26, 2001
Simulate the Gyralite (dual flashing headlights).ModelsJan 26, 2001
Moderately complex train detector using an infrared LED and an infrared detectorModels 
Simple train detector using ambient light and a photocellModelsJan 26, 2001
Deriving power from Lego NXT motor port AModels 
External power supply for Lego NXTModels 
Wire guidance sensorModels 
GP2D12 distance sensorModels 
Lego compatible, compact rotation sensorModels 
R/C digital camera controllerModelsMar 01, 2003
R/C helicopter cameraModelsOct 30, 2002
Slot car TV cronograph displays the lap times of your model cars on a regular TVModels 
Connecting Multiple SRF08 Sonar Modules to a BS2 (Basic Stamp 2)Models 
Circuit diagram for connecting the SRF08/10/235 sonar modules to the BS2p Basic StampModels 
Model rocket launch controllerModelsNov 02, 2010
Making a FRED photopopperModels 
RF Modem Robotics ProjectModelsJan 06, 2002
Simplest R/C circuitModels 
Glowplug driver for radio control modelsModels 
Two tone train hornModelsJan 26, 2001
Motor walker circuitModelsNov 16, 2002
R/C Emergency locator alarmModelsJul 24, 2002
Angelfire rocket GPS payloadModelsSep 10, 2006
Multi Rocket LauncherModelsNov 27, 2002
Model rocket launch controllerModelsNov 27, 2002