1M ohm resistor color code for 4 band
1M ohm resistor color code with 5% tolerance is as shown:
1M ohm resistor color code:
Brown, Black, Green, Gold
| Band | Color | Value |
|---|---|---|
| 1st Brown |  | 1 |
| 2nd Black |  | 0 |
| 3rd Green |  | 100000 |
| 4th Gold |  | 5%} |
| 1st digit 1 2nd digit 0 3rd is multiplier: 10 to power 4 | 1 M Ohms tolerance 5% |
1 Megaohm is calculated as:
1st band= Brown = 1(1st digit)
2nd band= Black = 0(2nd digit)
3rd band= Green = 5(multiplier)
4th band= Gold= ±5% (tolerance)
∴ 10×1000000±5% ==> 1000000Ω ==> 1MΩ
Tolerance value ==> 5% of 1M ==>5000Ω
Final assumed value of 1MΩ resistor is between 995 kΩ to 1005 kΩ
Other methods:
Remove the resistor from the Circuit PCB then test it with a digital multimeter in resistor mode and note down its value. It needs to be separated from board so as to avoid the equivalent resistance from parallel resistors in the circuit.
So, 1 megaohm resistor color code is brown-black-green-gold
also check 330 ohm resistor color code
