measuring dc voltage in a unique way!

Thread Starter

poison3000

Joined Oct 3, 2010
22
hello people ...


u probably saw and used a Digital voltmeter (or multimeter ) .. and when u choose the a node to measure its voltage u can read it clearly on small LCD screen ...

well , is it possible to have a circuit where some sort of a chip that u connect it across any component on the circuit ( say a resistor ) and that chip will start streaming bits that is linear to the dc voltage across that component ?

my idea is to have two separate dc voltages outputted from two different chip , then a magical chip or circuit will read theses dc voltage output and intrepret it some binary value , then binary values taken to digital comparator and decides which dc voltage value is bigger in magnitude ...

so , is there a way to build or find such chip ? what is it called ?

please help :confused:
 

beenthere

Joined Apr 20, 2004
15,808
That task can be done by any number of microprocessors. They must be able to input at least two separate sources to the A to D converter. There must be some means to insure the measured voltages are within the limits of the device.

After conversion, the larger voltage will have a larger numeric value.
 

Thread Starter

poison3000

Joined Oct 3, 2010
22
so basically i can deal with dc voltage as analog signal and use Analog-to-Digital Converter ? after all, dc voltage is continuous-time and continuous-amplitude , but with zero frequency .. right ?
 

beenthere

Joined Apr 20, 2004
15,808
It can be, but a DC signal can vary with time at any frequency. The thing that makes it DC is that the signal voltage is always one polarity - either positive or negative. A signal becomes AC if it crosses the zero voltage line.
 
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