splitting a 0-5v signal

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Jefff
Posts: 2
Joined: Thu Jun 07, 2018 10:43 pm

splitting a 0-5v signal

Post by Jefff » Thu Jun 07, 2018 11:02 pm

Hello, hoping for a little help with a problem I have. I need to split an analog 0-5v signal from a potentiometer to share the signal with another device. If I simply splice the connection it pulls down the circuit by over 1v which causes one of the devices to operate incorrectly.

The input is 5v to the potentiometer, the operating range is .50v - 4.25v. If i place an ohm meter on the the wire for the second signal I get 4400k.

I'm assuming I need some kind of powered circuit to solve this problem but I'm unsure where to start, this stuff is not my strong point.

Thanks, Jeff

Jefff
Posts: 2
Joined: Thu Jun 07, 2018 10:43 pm

Re: splitting a 0-5v signal

Post by Jefff » Sat Jun 09, 2018 1:05 pm

Going to try using an Op amp as a voltage follower to solve this issue.

jremington
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Location: Eugene, Or

Re: splitting a 0-5v signal

Post by jremington » Sat Jun 09, 2018 8:04 pm

That is the usual approach. You will need a rail-to-rail op amp, or a separate (possibly bipolar) power supply that allows a less capable op amp to cover the entire 0-5V range.

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