This app is a 8051 tutorial based on C language. It is suitable for hobbyist or engineering students. Features. 8051 architecture review. 8051 asm mnemonics. 8051 C lanugage. 21 projects including LED, buzzer, key switch, external interrupt, 7-segment display, 8x8 led matrix, timer 4x4 keypad, piano, serial debug monitor, 16x2 LCM, i2c eeprom, 93c46 etc.