query about adc0804….

[Pankaj Boola]

hii everyone..

i am making a project in which i am using LDR and LM35, so i need one adc0804 for each.
can anyone tell me that is it possible to interface two adc0804 with at89s52??

its giving me erroneous result in proteus when i add 2nd adc0804 even without making any connection with microcontroller

 

my program is working fine when i use only single adc, but when i go for second adc, it stops working.
plz help

thank u

[AJISH ALFRED]

Hi Pankaj,

No need of two ADCs. Suggest you to use ADC0808, which has 8 analog input channels. You can easily select any one channel at a time.

Connect the LDR and LM35 into two seperate channels and read any one of them at a time by selecting the required channel, using channel selection pins.

For more details go through the datasheet.

[Pankaj Boola]

 

thanx for your reply…

i’ve read all details about adc0808 and it can serve my purpose but the problem is, i already bought two adc0804…
so is there any way to interface both of them together?

i’ve given my connection diagram below, as soon as i add 2nd adc0804, proteus is not giving results….

 

wysiwyg_imageupload:7589:wysiwyg_imageupload:7590:

[Pankaj Boola]

 

thanx for your reply…

i’ve read all details about adc0808 and it can serve my purpose but the problem is, i already bought two adc0804…
so is there any way to interface both of them together?

i’ve given my connection diagram below, as soon as i add 2nd adc0804, proteus is not giving results….

 

wysiwyg_imageupload:7595:

 

 

 

 

wysiwyg_imageupload:7596:

 

[Author]

Posts