8051 Microcontroller Projects with Keil uVision, Embedded C Language and Proteus Simulation Software. 8051 microcontroller is designed by Intel in 1981. It is an 8-bit microcontroller. It is built with 40 pins DIP (dual inline package), 4kb of ROM storage and 128 bytes of RAM storage, 2 16-bit timers. It consists of are four parallel 8-bit ports, which are programmable as well as addressable as per the requirement. Free Version : https://play.google.com/store/apps/details?id=com.hexadev.c8051 Premium Version: https://play.google.com/store/apps/details?id=com.hexadev.c8051_pro