E12 Series | |||||||
---|---|---|---|---|---|---|---|
1R0 | 10R | 100R | 1K0 | 10K | 100K | 1M0 | 10M |
1R2 | 12R | 120R | 1K2 | 12K | 120K | 1M2 | |
1R5 | 15R | 150R | 1K5 | 15K | 150K | 1M5 | |
1R8 | 18R | 180R | 1K8 | 18K | 180K | 1M8 | |
2R2 | 22R | 220R | 2K2 | 22K | 220K | 2M2 | |
2R7 | 27R | 270R | 2K7 | 27K | 270K | 2M7 | |
3R3 | 33R | 330R | 3K3 | 33K | 330K | 3M3 | |
3R9 | 39R | 390R | 3K9 | 39K | 390K | 3M9 | |
4R7 | 47R | 470R | 4K7 | 47K | 470K | 4M7 | |
5R6 | 56R | 560R | 5K6 | 56K | 560K | 5M6 | |
6R8 | 68R | 680R | 6K8 | 68K | 680K | 6M8 | |
8R2 | 82R | 820R | 8K2 | 82K | 820K | 8M2 |
E24 Series | |||||||
---|---|---|---|---|---|---|---|
1R0 | 10R | 100R | 1K0 | 10K | 100K | 1M0 | 10M |
1R1 | 11R | 110R | 1K1 | 11K | 110K | 1M1 | |
1R2 | 12R | 120R | 1K2 | 12K | 120K | 1M2 | |
1R3 | 13R | 130R | 1K3 | 13K | 130K | 1M3 | |
1R5 | 15R | 150R | 1K5 | 15K | 150K | 1M5 | |
1R6 | 16R | 160R | 1K6 | 16K | 160K | 1M6 | |
1R8 | 18R | 180R | 1K8 | 18K | 180K | 1M8 | |
2R0 | 20R | 200R | 2K0 | 20K | 200K | 2M0 | |
2R2 | 22R | 220R | 2K2 | 22K | 220K | 2M2 | |
2R4 | 24R | 240R | 2K4 | 24K | 240K | 2M4 | |
2R7 | 27R | 270R | 2K7 | 27K | 270K | 2M7 | |
3R0 | 30R | 300R | 3K0 | 30K | 300K | 3M0 | |
3R3 | 33R | 330R | 3K3 | 33K | 330K | 3M3 | |
3R6 | 36R | 360R | 3K6 | 36K | 360K | 3M6 | |
3R9 | 39R | 390R | 3K9 | 39K | 390K | 3M9 | |
4R3 | 43R | 430R | 4K3 | 43K | 430K | 4M3 | |
4R7 | 47R | 470R | 4K7 | 47K | 470K | 4M7 | |
5R1 | 51R | 510R | 5K1 | 51K | 510K | 5M1 | |
5R6 | 56R | 560R | 5K6 | 56K | 560K | 5M6 | |
6R2 | 62R | 620R | 6K2 | 62K | 620K | 6M2 | |
6R8 | 68R | 680R | 6K8 | 68K | 680K | 6M8 | |
7R5 | 75R | 750R | 7K5 | 75K | 750K | 7M5 | |
8R2 | 82R | 820R | 8K2 | 82K | 820K | 8M2 | |
9R1 | 91R | 910R | 9K1 | 91K | 910K | 9M1 |
I came across a modern electronic hobbyist magazine that listed values of 50K and 40K for fixed resistors. I let them know in a nice way that it was pretty stupid of them to use non-standard values. The article was probably written by some clown that did everything on computer and never actually built the circuit, the computer program not have the smarts to use standard values.
By the way, I have the standard values of 20%, 10% and 5% resistors memorized, not because I set out to memorize them, but simply because after 40+ years of messing with them, it all just falls into place.
And I've known several people who didn't know the color code and simply use their trusty VOM to measure the values. Trouble is, the error in their ±3% meter that was pushing the extremes of its specs caused them to misread the values of all those 1% metal film resistors.