Analog Output

J

Jumpingfork

New Member

• Dec 20, 2008

• #1

I've got a PIC running on a 5v power supply. Is there a way to send a "high" signal of only 4,3, or 2v instead of 5?

 

Leftyretro

New Member

• Dec 20, 2008

• #2

Jumpingfork said:

I've got a PIC running on a 5v power supply. Is there a way to send a "high" signal of only 4,3, or 2v instead of 5?

Click to expand...

Well if you know the current draw of the device that is to receive the voltage then a simple series resistor can act like a voltage divider. There are other more complex methods such as comparator IC or even op amps. Tell us more about what you are actually trying to interface with.

Lefty

 

N

nitrofuzzy

New Member

• Dec 22, 2008

• #3

Jumpingfork,

If you want a variable output from 0v to 5v, then you should go for a DAC (Digital to Analog Converter). If you are simply driving an input that is not 5v tolerant, then you should should a logic translator IC or a simple voltage divider. Hope that helps.

 

ronsimpson

Well-Known Member

Most Helpful Member

• Dec 22, 2008

• #4

I think you want a 'low' of 0 volts and a high of 4.3 volts. (output)
Use two resistors to make a voltage devider.

 

bananasiong

New Member

• Dec 22, 2008

• #5

If you want to have multiple voltages with digital output use PWM with an op-amp for active low pass filter.