IS there an IC that exists such that an input voltage can be applied to one pin and then output on another pin, dependent upon it's voltage? ex. (1v)Pin1 = (1v)Pin9 and (2v)Pin1 = (2v)Pin10, let's say? Basically, it would be somewhat similar to the LM3914 chip used to run an LED bargraph display, but the input voltage is output from the different pins as opposed to the same voltage out of the activated pins.

I'm working on a project, but don't know too much about EE...if someone knows what this IC is called and where I might get one, I would really appreciate it!

 

Well, I'm not too sure I see what the intended application may be, but this 'may' help: Find a 1 - 4 analog switch IC, such as the 74HC4052, which is actually a dual 1 - 4. At this point, you'll have your common voltage input on pin x and 4 outputs, of the same value, on pins a,b,c,d. After this, you can take some op-amps and scale the individual outputs to whatever you need.

OR

You could use the same principle that applies to the LM3914 and use as many op-amps as you need for however many outputs you need. You'll use a single supply to feed one input through the use of a resistor ladder network, which will establish a certain voltage on each pin...this is something you'll have to fine-tune to your needs. Then just tie your input voltage to the second pin of all the op-amps. Basically, you're using the op-amp as a comparator and when the two voltages are compared, only one is going to come out. If you look on page 6 of the LM3914 data sheet, you'll see the op-amp setup that I'm referring to.

As far as comparator IC's go, give this a look: Data Sheet for LM139, 239, 339, 2901 & 3302

After re-reading your post, it seems like the second method is a better plan, but I'll leave the first incase its of interest.

 

Hey, Thanks alot! I'll have to look at those data sheets later, but what I'm trying to do is have something that will "sort" out a changing voltage signal so that I can modify it by different amounts at different ranges. So, I might want the 1v input to eventually come out of the circuit as .5v, but a 2v as 1.5v and 3v as 2.1v (as an example)...so, I'd need to use a few op-amps but need a chip that will choose which path the input voltage will take. Does this make sense?
***************---(op amp)
3v-(Unknown chip)---(op amp)
***************---(op amp)--2.1v
***************---(op amp)

 

Okay wait...I think I see what I might be able to do with the LM3914...I could use the different output pins to turn on the seperate op-amps that will just take the pure signal from the beginning of the circuit and then change it! So, the signal won't actually go through the LM3914 chip, but will merely choose which op-amp is used. Does this seem like it could work? Sorry if I'm not very clear, but I'm not too sure of what I'm doing