Heres the thing i have got a 5 volts input and what i am supposed to do is to make something in between to make my output voltage to vary from 0 to 3.3volts . I know it can be simply done through a potential dividr bt i am not allowed to use it .
Suggest me some good sensor with the help of whih i could aquire my desired output ???
LM317?
Why are you not “allowed” to use a voltage divider? What specifically is the problem with doing that?
Better questions get better answers.
Are you hinting my solution below might not be the optimal one ?lyndon:
Better questions get better answers.
The OP could use the 5v to run a DC motor (current unspecified). The output shaft would be connected to a generator, whose AC output goes into a step-down transformer. It’s output is then rectified and LPF’ed to get a DC voltage. If the output is to be continuously variable then a Variac could be utilized in lieu of a fixed turns ratio step-down transformer.
Simple and effective !
Junaidehsan:
Heres the thing i have got a 5 volts input and what i am supposed to do is to make something in between to make my output voltage to vary from 0 to 3.3volts . I know it can be simply done through a potential dividr bt i am not allowed to use it .Suggest me some good sensor with the help of whih i could aquire my desired output ???
A clearer description would help. I can read you question one of several ways. Please describe application, imposed restrictions, schematics, etc
Buffer a voltage divider comprised of large resistors, or a pot with an opamp in a non-inverting mode with unity gain. I assume you can you a voltage divider because you would not be able to draw any current from it without changing the voltage.
Junaidehsan:
Heres the thing i have got a 5 volts input and what i am supposed to do is to make something in between to make my output voltage to vary from 0 to 3.3volts . I know it can be simply done through a potential dividr bt i am not allowed to use it .Suggest me some good sensor with the help of whih i could aquire my desired output ???
Is the 5 volt input digital or analog in nature?
Does the 0-3.3 volt range need to be linearly mapped to 0-5 volt?
What does the output need to drive? What is behind it? How much current does it need to output. Ie., is the ‘actuator’ a motor or other large current device, or a low current device like a digital multimeter, or something in between like a LED? (And how much can the input-source deliver?)
As has already been made clear, Johnny 5 says “Need more input!!”
Well it is going to be a source for an ADC . My 5 volts input will be an analogue source.
So far i m thinking to use LM317 but i will take other advises as well
What kind of source? The reference? If so, then you do want a stable, low impedance supply and an adjustable reference is probably a good choice.
If it’s just the input, there is no reason I can think of why you shouldn’t use a divider. In fact, using a divider allows you to make it ratiometric with the reference so one end is automatically full scale and the other end is zero.