Pot Potentiometer

Pot Potentiometer
On the issue of circuit bending ... How does a potentiometer with a trimmer?

Basically, I have a potentiometer 500K and the circuit is blocked when the pot is turned all the way to extremes. Anyone know what size trimmer install? I know that in essence, how it works, but do not know what size to buy.

ANY pot has the same problem. His problem is a design problem and should be remedied by installation of resistance of limitation. Let's say you connect your 500K pot to a 12 volt battery, in order to +, the other end - with the center wiper attachment a meter, and the other end attached to the underground - the Battery. By adjusting the pot, you will see 0.0 to 12.0 volts depending on where you set the boat. If the design can not handle 0.0 or 12.0 volts, and I want my idiot-proof design, then I have to add resistors limitation. I can do this by design, guess or measurement. Say I imagine that any voltage below 1.0 volts and 11.0 volts above causes a problem, so I want to design my circuit, so the output of the pot will never go below 1.0V or above 11.0V. Using Ohm's law (e / i = r), I guess 12V divided by 500K = 24 AU. This is the current that passes through the pot all the time. 1.0V/24uA = 41.6K Ohms, voltage difference is I want to remove the circuit at both ends. This is the size of the voltage limiting resistance that haunts me to 42K Ohms. So if we go back to our battery and the pot, and add a 42K ohm resistor between the battery + and the pot, and a 42K ohm resistance between - and the pot, this will achieve what we want. Now, how to adjust the pot, you only see 1.0 to 11.0 volts on the meter. It is necessary to extrapolate the results to your circuit. Find out why what values you do not like, and add the resistances limiting. If I knew more than they say could be adjusted more