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Here's what I have come up with so far and was wondering if there was a better way to covert a 0 to 10 signal to 5 to 0 to 5 signal, < 30 Hz. The absolute value circuit actually worked on a bread board, but not in Spice.
Here's my final and it worked perfectly
I'm a bit confused here.
So you need to convert 0V to 10V to 5 - 0 - 5V?
What does that mean exactly?
I assume that input of 5V needs to output 0V but what should the output be with an input of 0V? -5V?
I've read all the posts and looked at the graphs but it still isn't clear to me.
EDIT:
I've had another look at the schematic and graph posted by Eric and it seems clear now.
Vout = absolute(Vin-5)
Seems like an unusual thing to do.
Perhaps there's a simpler way.
Actually, It's working very good. As I put 0 - 10 into it I get a very good +5 to 0 to +5 out. It's 10 to 5 to 10 after the absolute value, 5 to 0 to 5 after the "subtraction". Presently waiting for the interface to controller. It's supposed to take 0 to 5, but it's only taking 1 to 1.7 as is. Hopefully it can be reprogrammed.
It is just 2 quad op-amps and an instrument amp chip + resistrors & diodes.
Kinarfi
Have you actually built it yet or have you just simulated it?Actually, It's working very good. As I put 0 - 10 into it I get a very good +5 to 0 to +5 out. It's 10 to 5 to 10 after the absolute value, 5 to 0 to 5 after the "subtraction". Presently waiting for the interface to controller. It's supposed to take 0 to 5, but it's only taking 1 to 1.7 as is. Hopefully it can be reprogrammed.
It is just 2 quad op-amps and an instrument amp chip + resistrors & diodes.
Kinarfi