strokedmaro
New Member
Is it possible to (for example) to input 0-5vdc to a digital pot and have a linear output of 12-0? For example. a 2.5vdc input would have a 6vdc output...or a 5vdc input would have a 0vdc output? Thanks!
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The short answer is no.strokedmaro said:Is it possible to (for example) to input 0-5vdc to a digital pot and have a linear output of 12-0? For example. a 2.5vdc input would have a 6vdc output...or a 5vdc input would have a 0vdc output? Thanks!
A digital pot requires a digital input. You have an analog input signal and want an analog out.strokedmaro said:The Idea would be to create a linear relationship between throttle body (car) position which produces a 0-5vdc signal and convert that to a 12-0vdc signal to control transmission line pressure.
crutschow said:A digital pot requires a digital input. You have an analog input signal and want an analog out.
Seems like all you need is an inverting op amp with a 12/5 = 2.4 gain and biased with a +12V output offset. Thus with 0V in, the op amp's output is 12V and with 5V in, the op amp's output is 0V.
Depending on the load you may need a buffer amp at the op amp output.
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See. Now that it's better understood what you need, we can come up with better solutions.
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strokedmaro said:Sounds like you know what your talking about...Ive looked at Op amps before but found that most were audio related. Am I mistaken?