Public info about the author: wen2005
Pulse width Modulation implemented with the analog to digital converter ADC0808 that reads a voltage from a potentiometer and controls the pulse width of the output of the microcontroller. The code is in assembler.
SPICE simulation of Tetris game with 8051 microcontroller. The microcontroller AT89C52 implements the famous Tetris game driving an alphanumeric LCD display. The source code is in C.