AVR-Chat

At 08:45 AM 5/21/2004 -0500, Mike Murphree wrote:

>Kathy Quinlan said:
>> jay marante wrote:
>>
>>> are you sure you got your formulas right?!
>>> that's just a voltage divider and im pretty sure you can't generate
>>> 650kV from a 12V battery. im sorry but i can't remember the formula
>>> for  the voltage divider circuit.
>>> maybe someone might confirm that the multisim was right with its
>>> output.  as far as i know, current can be computed by dividing Vbatt
>>> over the  total resistance, which is 1,300,010 ohms. pretty low
>>> current there!
>>
>>>      >
>>>      >       battery
>>>      >          |
>>>      >         <
>>>      >         > 1.3 Mega ohm
>>>      >         <
>>>      >          |
>>>      >          |------------------- ADC7   ~ 5V as simulated in
>>> multisim |
>>>      >         <
>>>      >         > 10ohm
>>>      >         <
>>>      >          |
>>>      >      GND
>>>      >


You must be way off in your math somewhere.
A 12V battery is <3X 5V, so the divider should be in that range.