hi kinjalgp,
i thought that i have to use 3 transistors in order to use three sensors with one adc0804 (for line
selection). i never thought that the 8 channels adc0804 provides could handle three sensors,
thanks for your input,
i never really use a 89s51 before. i used a dt-51 board, it's a packed modul contains 89c51,
lcd, two external rams, and a max. but to use that modul in my project could mean cheating.
so you may think that i'm a total newbie here
and, another question, i want to add two green+red leds for indicator. the one is for showing the status between data logging (the microcontroller saves data from heat sensor to the
sram), and idle (the microcontroller does nothing), and the other led is for showing the status whether the board is uploading the data into the computer (the computer gets saved data from
sram), and idle.
since the at89s51 has p0, p1, p2, and p3...can you suggest me which pin i could connect
the adc0804 to, and for two leds and sram?
btw, do i need to use a multiplexer between adc0804 and the sram?
thank you, and sorry for long question