Hi everybody!
I have a llittle problem...I'm relatively new to these projects,so i would appreciate any help!
What i'm trying to do is to build a simple magnetometer with a hall effect sensor.I use a digital panel meter and i want it to show me not the voltage output of the sensor,but the present magnetc field's flux density.The equation is B=(V-2.5)/2.5
So that for example if the voltage output that i count is 2.5,my indication to be 0.if my voltage is 5,the indicator to display 1 and so on.
How exactly can i converty my voltage in this way?
I know that i have to use an opamp with 2 resistors with a ratio of 0.4 to invert (V-2.5) so that it's divided with 2.5.What i didn't know is how to invert my voltage to Vout-2.5.
Sorry if my questions are stupid...![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I have a llittle problem...I'm relatively new to these projects,so i would appreciate any help!
What i'm trying to do is to build a simple magnetometer with a hall effect sensor.I use a digital panel meter and i want it to show me not the voltage output of the sensor,but the present magnetc field's flux density.The equation is B=(V-2.5)/2.5
So that for example if the voltage output that i count is 2.5,my indication to be 0.if my voltage is 5,the indicator to display 1 and so on.
How exactly can i converty my voltage in this way?
I know that i have to use an opamp with 2 resistors with a ratio of 0.4 to invert (V-2.5) so that it's divided with 2.5.What i didn't know is how to invert my voltage to Vout-2.5.
Sorry if my questions are stupid...