User Manual

10
Read the resistance of the above resistor from left to right. The value is 1(brown) 0(block) x
10^5(green)=10x10^5Ω=10^6Ω=1MΩ and the permissible error is ±5%（gold）
The resistance value of the resistor below is 5(green) 1(brown) x 10^5(green) = 51 x 10^5 Ω =
5.1 x 10^6 Ω = 5.1 MΩ, and the permissible v alue is ±5% (gold).
(h)
You can also use a multimeter to measure the resistance value of these resistors to double
check w hether you've read it correctly or not.
Potentiometer
Potentiometer is also a resistance component with 3 terminals and its resistance value can
be adjusted according to some regular variation. Potentiometer usually consists of resistor
and mov able brush. When the brush is mov ing along the resistor, there is a certain resistance
or voltage output depending on the displacement. Figure (i) is the potentiometer and figure
(j) is the corresponding circuit symbol. The middle pin in figure (i), represented by the arrow
in Fig. (j) is the movable brush.
(i) (j)
The functions of the potentiometer in the circuit are as follows:
1. Serving as a v oltage divider
Potentiometer is a continuously adjustable resistor. When you adjust the shaft or sliding
handle of the potentiometer, the movable contact w ill slide on the resistor. At this point, a
voltage can be output depending on the voltage applied onto the potentiometer and
the angle the movable arm has rotated to or the travel it has made.
2. Serving as a rheostat
SunFounder