HowTo: Electronics - Build seven segment LED digit called "pxlDigit" from WS2812 LEDs - Nerdiy.de - Nerdy DIY HowTo's about electronics, 3D-printing and more.
Mechanical 7 Segment Display Clock Using An Arduino & 28 Servos - The DIY Life | Arduino, Clock, Display
DIY Large Seven Segment Display « Matt's Hacks
Adafruit 1.2 4-Digit 7-Segment Display w/I2C Backpack - Yellow : ID 1269 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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Awesome DIY digital clock constructed from 144 x 7 segment displays - Geeky Gadgets
DIY Large LED Lit 7 Segment Display : 10 Steps (with Pictures) - Instructables