Resistor Color Code.



Resistor with Examples


If you are a bit serious about the electronics hobby I recommend learning the "Color-Code". It makes life a lot easier. The same color code is used for everything else, like coils, capacitors, rf-chokes, etc. Again, just the color code associated with a number, like: black=0 brown=1 red=2, etc, etc.

Resistance, Power, Current, Volts Formulas



Ohm's Law. R is Ohm,or Resistance, V is Volt, I is Current, P is Watt, or Power.


dBm to Watts Conversion Chart

dBm Watts dBm Watts dBm Watts
0 1.0 mW 16 40 mW 32 1.6 W
1 1.3 mW 17 50 mW 33 2.0 W
2 1.6 mW 18 63 mW 34 2.5 W
3 2.0 mW 19 79 mW 35 3.2 W
4 2.5 mW 20 100 mW 36 4.0 W
5 3.2 mW 21 126 mW 37 5.0 W
6 4 mW 22 158 mW 38 6.3 W
7 5 mW 23 200 mW 39 8.0 W
8 6 mW 24 250 mW 40 10 W
9 8 mW 25 316 mW 41 13 W
10 10 mW 26 398 mW 42 16 W
11 13 mW 27 500 mW 43 20 W
12 16 mW 28 630 mW 44 25 W
13 20 mW 29 800 mW 45 32 W
14 25 mW 30 1.0 W 46 40 W
15 32 mW 31 1.3 W 47 50 W

Power Measurement Units

dBm - decibels relative to one milliwatt
dBW - decibels relative to one Watt

Gain Measurement Units

dBi - decibels relative to an isotrope
dBd - decibels relative to a dipole