I have a +1VDC voltage, so from the this tension, I want the -1VDC, to change the direction of rotation of a drive speed.
So I want to reverse the voltage from +1VDC to -1VDC
see my freind
the drive speed has only 1 inbut of direction, if the value is +1VDC we have a direction, if it is -1VDC we get the second direction.
I have 2 Potentiometers, the value of output of the first Potentiometer is OK " +1VDC "
And I have also the value of the second Potentiometer is +1VDC, But I need it -1VDC
Hi elmahboule,
in that case you have two possibilities;
1,
the second potenciometer is to supply from a opposit polarity as the first one!
2,
if you dont have an inverted voltage for your second poti`s supplying= use a voltage inverter amplifier; BUT for that you NEEDS a SUPPLY WITH +/- voltages...
K.
It would be useful to have a bit more information - there may be an easier solution. For example if you just want +1V or -1V then an analogue switch may be all you need.