How to Use 4-Position Slide Switch and Fixed Resistors to Replace 10k Variable Resistor?

I'm trying to modify a circuit that uses a 10kOhm variable resistor. I would like to replace it with a 4 position slide switch and fixed resistors to get 3 discrete steps and an off position.

Unfortunately, my EE and circuit design knowledge has about 20 years of rust on it and I can't visualize how to do this. Anyone have a suggestion?

Thanks.

Eugene:


So I can help, for me it is necessary to know what makes your circuit function, plane and component information, look: I know for this purpose if the variables driving circuit analog, discrete, hybrid etc, one-dimensional, two-dimensional or three-dimensional and so on. are functions of variables, discrete or hybrid?
For example, the potentiometer type: linear, logarithmic, or have another mathematical function? and so on. in short, need more information to help

I have adapted a circuit design to signal an IC that controls a heating element. The variable resistor signals the sensor lead on the IC and determines the power to the heating element. It was originally controlled by a single linear 3 leg 10kOhm variable resistor, but I find that 3 discrete heat levels is what I actually need. The heat element is 120V which is also powering the entire circuit.

Does that help? Thank you.

Eugene,

Here's an example of using a 5-position rotary switch to give you full on, three variable positions, and full off.

Is this what you're looking to do?

Yes, I think that might work. I think I get how to work that in. I was tripping up on the fact that the variable resistor was a 3 leg and I couldn't figure out how to make a switch and resistor work in that configuration, but I forgot I need to balance the resistance across the non-wiping legs, which your circuit does.

Thank you!

Eugene

Well done Joe!