In this project, you will design the simplest form of voltage source with specifications as follow:
a. It should be possible to adjust the voltage between -2V and +2V using one potentiometer. It should not be possible to accidentally obtain a voltage outside this range.
b. The circuit should use as little power as possible, should not exceed 50mA.
c. The default resistance load (RL) is 10MΩ.
• Potentiometers: 5KΩ, 10KΩ, 50KΩ
• Assorted resistors with values from 1.1Ω to 10MΩ
• Analog Discovery Power supply: +5V and -5V
- Voltage division, KCL, KVL, Node, and Mesh analysis. Those are the tools I have in my toolbox. But right now if feels like I'm trying to hammer in a nail with a screwdriver.
I need to create a powersupply that takes in a +5 and -5v and has an adjustable output that varies between -2 and +2 v using one potentiometer.
I already came up with a design myself but it did not work. I need some help figuring this out.
I think my idea for how to get specific positive or negative voltages I want are decent but something is going wrong in the middle. I think I have current going where I dont want it to go. I'd love to use a zenner diode but that is not allowed.
I have attatched my original circuit design.
It's my first time using a potentiometer but I was able to adjust the voltage, just not to what I need too.
And once again, Thank you for your time.