A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. Resistors act to reduce current flow, and, at the same time, act to lower voltage levels within circuits. In electronic circuits, resistors are used to limit current flow, to adjust signal levels, bias active elements, and terminate transmission lines among other uses.
Value | 220 Ω |
---|---|
Type | 4 Band Colour Code System |
Colour Code | Red, Red, Brown, Gold |
Multiplier | Brown, 10 |
Tolerance | Gold Band ±5% |
Red, Red, Brown, Gold
Band | Color | Value |
---|---|---|
1st Red | 2 | |
2nd Red | 2 | |
3rd Brown | 10 | |
4th gold | +-5% | |
1st digit 2 2nd digit 2 3rd multiplier: x10 |
220 Ohm tolerance: +-5% |
(link of calculating resistor by color code in detail)
1st band= Red= 2(1st digit)
2nd band= Red= 2(2nd digit)
3rd band= Brown= 10(multiplier)
4th band= Gold= ±5% (tolerance)
Therefore, 22×10±5% ==> 220Ω ==> 0.22kΩ
And tolerance considered as ==> 5%of220 ==>11Ω
Final assumed value of 220Ω resistor is between 209 to 231Ω
Red, Red, Brown, Silver
1st band= Red= 2(1st digit)
2nd band= Red= 2(2nd digit)
3rd band= Brown= 10(multiplier)
4th band= Gold= ±5% (tolerance)
Therefore, 22×10±10% ==> 220Ω ==> 0.22kΩ
And tolerance considered as ==> 5%of220 ==>22Ω
Final assumed value of 220Ω resistor is between 198 to 242Ω
If resistor contains Brown and Red color in bands then check it, because, red and brown appears to be very similar when it is placed in a circuit.
Use a DMM to take the value of resistor best method to do so. But digital multimeter does not read proper values when a resistor is on PCB or connected to other components, in such situation color code is reliable