Adjustable signal conditioner with constant mid point.
I need help with a joystick project I am working on for disabled people.
The input device is a 2 axis joystick with a 5V DC supply and a 2.5V midpoint in 2 axis. This is an electronic device and not two pots. The input voltage must stay at the 5V to make the joystick function.
The Controller works in a closed loop mode comparing the input signal and the feedback signal from two linier 10K pots (1 per axis)
The midpoint for both input and feedback is 2.5V with a range of 0V min - 5V max
The controller works fine as it is setup but I would like to be able to vary the input signal from the current 0V to 5V (2.5V midpoint) to some of the following by using a pot and op-amp or some circuit that will keep the midpoint at 2.5V.
.5V to 4.5V (2.5V midpoint)
1V to 4V (2.5V midpoint)
2V to 3V (2.5V midpoint)
I have a link to the basic design layout at http://www.designabilityinc.com/help/Control_Conditioner_Rev_A.ppt
Thanks for any help or suggestions.
www.designabilityinc.com
I need help with a joystick project I am working on for disabled people.
The input device is a 2 axis joystick with a 5V DC supply and a 2.5V midpoint in 2 axis. This is an electronic device and not two pots. The input voltage must stay at the 5V to make the joystick function.
The Controller works in a closed loop mode comparing the input signal and the feedback signal from two linier 10K pots (1 per axis)
The midpoint for both input and feedback is 2.5V with a range of 0V min - 5V max
The controller works fine as it is setup but I would like to be able to vary the input signal from the current 0V to 5V (2.5V midpoint) to some of the following by using a pot and op-amp or some circuit that will keep the midpoint at 2.5V.
.5V to 4.5V (2.5V midpoint)
1V to 4V (2.5V midpoint)
2V to 3V (2.5V midpoint)
I have a link to the basic design layout at http://www.designabilityinc.com/help/Control_Conditioner_Rev_A.ppt
Thanks for any help or suggestions.
www.designabilityinc.com
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