Hi,

I wanted to generate a linearly variable voltage ranging from 0 to 12 volt similar to normal adc (0 to 5 v). My purpose is to upgrade my (0 to 5v) adc to a (0 to 12v) system. Please help me with this.

Thanking you..

 

hi,
Are you asking for a 0 to +12V ramp voltage generator
or
an OPA amplifier to condition an existing 0 to +5V ramp signal to 0 to +12V?
or
both.
E

 

I suggest using an amplifier with a gain of 2.4.

 

A 12V supply and a linear potentiometer across it?

 

I don't know what you are after, but if you employ a generic op amp without using the proper techniques your precision will decrease.

 

Exactly what are you going to do with the 12V?

 

An op amp amplifier with 2.4 gain sounds feasible. My existing setup is a variable voltage out which varies between 0 to 5v, I want a ratio circuitry setup so that i could use this (0 to 5v) as input to the circuit to generate a 0 to 12v output.

Thanking you...

 

The variable voltage out (0 to 12v) is to be used simply as some sensor input.
Do you guys know if there is a DAC or a digital potentiometer which could generate or source a 12 volt variable voltage??

 

An op amp amplifier with 2.4 gain sounds feasible. My existing setup is a variable voltage out which varies between 0 to 5v, I want a ratio circuitry setup so that i could use this (0 to 5v) as input to the circuit to generate a 0 to 12v output.

Here is a circuit. It requires a +15V single supply if you use a LM324 or LM358. These work with their inputs at or slightly below Vss (0V), and their outputs pull close to (but not all the way to) Vss. Otherwise you will need split supplies to get to zero output...

 

Thank you guys...