Input signal control adjustment circuit

11 years 2 months ago #29525050 by wstuck
Input signal control adjustment circuit

I am using a RoboteQ controller and I would like to make my input control circuit more robust without changing any of the feedback setting. The input is a joystick with a 5volt power source and the signal is set at 0-2.5 and 2.5-5. This works fine but I would like to reduce the input so there is some adjustability in the control.

In ideal solution would be a box or circuit that would de-amplify or amplify the input signal by adjusting a pot or flipping a switch.

Any suggestions would be very helpful.

See my project at www.designabilityinc.com

Thanks,
Wstuck
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11 years 2 months ago #29525051 by cosma
Replied by cosma on topic Re:Input signal control adjustment circuit
All that the controller cares about is the voltage, regardless how you generate it.

You can add resistors between the pot and the 5V, and between the pot and the GND to limit the max speed in a given direction while the joystick is pushed all the way. Beware that if you use different value resistors at each end of the pot, the joystick may no longer have 2.5V when centered.

To make the controller more sensitive, i.e. go to full speed when joystick is only half of the way, for example, you will need some kind of amplifier.

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