When I am toying around with new projects I often need to test things out with resistors of different values. Often I find that I don't have the value I need, so I am constantly buying new ones just to test.
I do have a potentiometer but it's a manual process of turning the knob a little bit and then reading the resistance.
I was thinking of a hardware that would help me, so I would be happy if anyone knows if this exists to buy today.
My vision is a PCB with a display, a few buttons, powered by its own battery, and then an input and a output, as well as a configurable resistor.
I could then connect the input and output and on the display I would see what resistance the circuit is offering right now. I could use the buttons to go from lets stay 1 ohm to 1k ohm in incriments of 1 ohm at a time (or 5 ohms)
With this I could experiment using different resistor values before I find the perfect one and buy it.
So let me know, does this exist?
I have seen that there are programmable resistors, but they seem to be offered only in very high resistances. Now if course I could make a circuit that is always reading the resistance of my manual potentiometer and displaying it, but then I would need one that isn't so sensitive so that the smallest of turns of the knob doesn't bump it up 20 or 30 ohms