Hi

I have a Sensor Output 0-5V Analog, but mi Microcontroler (ADC) only support to 3.3V.

How can accondition that signal?

 

Resistor voltage divider.

 

Use a 1K7 and 3k3 divider, a 5K trim pot is the easiest solution.

 

Many ways to skin the cat:

 

Another solution?

 

4 ways isn't enough?

 

Friends

the Microcontroler really are a Intelligent display

4D SYSTEMS :

http://www.4dsystems.com.au/productpages/uLCD-70DT/downloads/uLCD-70DT_datasheet_R_1_2.pdf

The power supply to Microcontroller are 5V, but in his Input Pins (analog) only accept 0-3.3V

 

Hi #12

your propose have the Microcontroller power supply like a 3.3V.

The Microcontroller Power supply are 5V, and the inputs only support 0-3.3V (ANALOG)

Excuse mi ignorance and thanks for the help

 

Just don't connect the 3.3V to the Uc.

 

Thanks a Lot #12

 

Thanks a Lot #12

That's what the, "like" button is for.

 

jijiji...sorry im new in this forum

 

No problem. That button is a new feature because all of the software for this site changed a few weeks ago.
I just asked the important people to change it back to, "Thanks".

 

hi #12.
Please check the placement of those two resistors, 10k and 4k7

Eric.

 

hi #12.
Please check the placement of those two resistors, 10k and 4k7 Eric.

Eek! You caught me in a mistake!

Updating now...

Actually, I depend on peer review on this site. Everybody makes mistakes. Many eyes catch them, hopefully before they can cause much real damage.

 

You could also introduce an active attenuator with a gain of (3.3/5). That way the A/D input will not load the resistive voltage divider.

 

hi papabravo

how is that?

 

You could also introduce an active attenuator with a gain of (3.3/5). That way the A/D input will not load the resistive voltage divider.

Very good point. Without any data about the ADC being used, the best I can do is demonstrate the math in case the values I used are inappropriate.

 

with Operational Amplifiers?

 

Voltage divider followed by a buffer?

Sensor output goes into voltage divider, voltage divider output goes into buffer made of op amp, buffer output goes to ADC.