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SkyParade: an Invitation for Open Ended Creativity With LEGO
Girino - Fast Arduino Oscilloscope
Arduino - Oscilloscope (poor Man's Oscilloscope)
Tutorial for Monster Motor Shield VNH2SP30
Restoring/Recharging Over-discharged LiPo (Lithium Polymer) Batteries!
DIY Offroad Lighting
I2C Between Arduinos
How to Make Electric Foam Cutter
Make an Oscilloscope Using the SainSmart Mega2560 With the TFT LCD Shield and the 3.5 "color Touch Screen
2-Speed Manual Transmission Working Model
Controlling Direction and Speed of DC Motor Using Raspberry Pi
Hi. You may want to include http://geargenerator.com. Altough it's not a design software is a very neat tool for generatin gear train online.
How to build an electric Longboard with phone control
How to Make a Mini Compressed Air Turbine
BeamBox - A tower that glows to your commands
Beginners Guide to Connecting Your RC Plane Electronic Parts
Battery Powered Hovercraft
Inexpensive, easy to build, peristaltic pump
Web Controlled 8-Channel Powerstrip
DIY Arduino Remote Control and Lego RC Vehicle!!
Self-balancing skateboard/segw*y project Arduino Shield
Mini Arduino environment monitor ** UPDATE - Added RTC ***
DIY Muscle Sensor / EMG Circuit for a Microcontroller
Cheap, Sturdy, 1-Hour Quadcopter
BoB the BiPed
Android talks to Arduino
Simple RC car for beginners (Android control over Bluetooth)
Arduino - Control DC Motor via Bluetooth
Capacitive Touch Arduino Lamp
Control Servos over the Internet via Arduino with Teleduino