Juan Sulca, Abha Patil

Logic Fed Scene Randomizer is a PCB art piece that illustrates how an LFSR works. A Linear Feedback Shift Register is a circuit capable of generating a sequence of random numbers from a starting non-zero value. Some of the bits of the shift register (taps) are XORed and fed back to the input of the shift register to continue the process. In this case, the outputs of the LFSR are connected to LEDs arranged in a 4 by 4 grid. This circuit creates random patterns with a period of 65535 unique values. This work was driven by creating circuits and patterns without using code or microcontrollers. The LFSR is commonly implemented in code and circuit forms and is one of the simplest ways to generate random numbers in systems like the NES because of its easy implementation in 6502 assembly code. Modern processors and computers can have dedicated units to generate random numbers and multiple algorithms are available to generate them.