I am given a DC line with a variable voltage along a set scale: let's say 0-10V. I would like to send an output DC line with a voltage reversed along that scale.
- 10 Volts in becomes 0 Volts out,
- 9 Volts in becomes 1 Volt out,
- 5 Volts in becomes 5 Volts out,
- 0 Volts in becomes 10 Volts out.
Note that the polarity is not reversed.
My question is: is there device I can buy or a relatively simple wiring scheme that can get me there? My intention is to take a signal from a PID tension-controller that controls a brake, and instead power a motor when needed. Oof, good question on the current. Let's say it is one amp.