Monthly Archives: October 2010

Mode 7, and How to Fake Depth in 2d

The term Mode 7 originated on the Super NES video game console, on which it describes a simple texture mapping graphics mode that allows a background layer to be rotated and scaled. By modifying the scaling and positioning of the layer on a scanline-by-scanline basis, a simple perspective effect can be applied, transforming the layer […]

EAGLE Library for 4-Digit 7-Segment LED Display

I made this EAGLE library for the LTC-4027JR 4-digit common cathode 7-segment super bright red LED clock display. As of right now, they’re $3.96 on Since each digit has a common cathode, I have to multiplex the digits to display numbers larger than 9. The library can be used in EAGLE to make schematics […]