There is no inbuilt ADC in 8051….
1) so, first select ADC chip which should be interfaced to 8051…ex:ADC0804, TO This chip is connected to the sensor and try for ADC interfacing programming….of 8051
microcontroller to PC
1) to connect the kit to PC…..Make use of MAX232 in between kit and computer, and try for UART programming……of 8051
just once try it,ok