I need advice about how to manage a ADC0808 as a general ADC IC
because i have a final task to make a teaching aid for mcs51 using ADC0808
as i know ADC0808 has several input and output.
I still can't put it general enough i even confuse when reading the data sheet
I need advice about how to manage a ADC0808 as a general ADC IC
because i have a final task to make a teaching aid for mcs51 using ADC0808
as i know ADC0808 has several input and output.
I still can't put it general enough i even confuse when reading the data sheet
A point to understand is that the LM35 is 10mV/Cdeg, so that means a max of 1V at 100Cdeg.
The ADC is 8bit [255] so the resolution will be about 1Cdeg.
it's correct
the LM 35 have resolution 10mv/cdeg and max 150 c deg, so it will be 1.5V.
thats why i use OpAmp to aplify it to 5V
but since I didn't know the limit current for LM 741 noninverting input and the max output current of LM35 I only use a potensio at the output of LM 35 before input noninverting in LM741.
these circuit suppose work in proper, after i find out the ideal resistance to sync LM 35 with LM 741 I 'll definitly exchange the potensio with fix film resistor, later.
it's correct
the LM 35 have resolution 10mv/cdeg and max 150 c deg, so it will be 1.5V.
thats why i use OpAmp to aplify it to 5V
but since I didn't know the limit current for LM 741 noninverting input and the max output current of LM35 I only use a potensio at the output of LM 35 before input noninverting in LM741.
these circuit suppose work in proper, after i find out the ideal resistance to sync LM 35 with LM 741 I 'll definitly exchange the potensio with fix film resistor, later.