HELP THE NEWBIE<------

[Lada]

When you go to the shop, you will buy component called potenciometer, usualy small one with 3 pins.
You can connect it in two styles :
like a rheostat : connect only 2 pins = used for curent regulator
like a potenciometer : connect all 3 pins = used for voltage divider

Potenciometer in the previous connection is connected like reostat. But with the second rezistor this thing works like potenciometer, so divides voltage... very simple.

Of course, its possible to buy potenciometers for higer wattages = usualy used like rheostat, so the third pin is "not connected". This high wattage potenciometer in volt divider is for nothing.

 

[Super Mario]

When you go to the shop, you will buy component called potenciometer, usualy small one with 3 pins.
You can connect it in two styles :
like a rheostat : connect only 2 pins = used for curent regulator
like a potenciometer : connect all 3 pins = used for voltage divider

Potenciometer in the previous connection is connected like reostat. But with the second rezistor this thing works like potenciometer, so divides voltage... very simple.

Of course, its possible to buy potenciometers for higer wattages = usualy used like rheostat, so the third pin is "not connected". This high wattage potenciometer in volt divider is for nothing.

Thanks a lot...But I have one question left,where should I connect each pin if i want to use it as potentiometer??

 

[Lada]

2 pins between them is constant resistance (doesn't depend on "runner's" position) you should connect to power supply.
On the third pin, runner, you can measure variable voltage depends on runner's position.
You can imagine potenciometer like 2 serial variable resistors and the third pin is connected in center.