Resistors
As the name implies,
resistors add resistance to the circuit and reduces the flow of electrical
current. It is represented in a circuit diagram as a pointy squiggle with a
value next to it.
The different markings on the resistor represent different values of
resistance. These values are measured in ohms.
Resistors also come with different wattage ratings. For most low-voltage DC circuits,
1/4 watt resistors should be suitable.
You read the values from left to right towards the (typically) gold band. The
first two colors represent the resistor value, the third represents the
multiplier, and the fourth (the gold band) represents the tolerance or
precision of the component. You can tell the value of each color by looking at
a resistor color value chart.
Or... to make your life easier, you could simply look up the values using a graphical
resistance calculator.
Anyhow... a resistor with the markings brown, black, orange, gold will
translate as follows:
1 (brown) 0 (black) x 1,000 = 10,000 with a tolerance of +/- 5%
Any resistor of over 1000 ohms is typically shorted using the letter K. For
instance, 1,000 would be 1K; 3,900, would translate to 3.9K; and 470,000 ohms
would become 470K.
Values of ohms over a million are represented using the letter M. In this case,
1,000,000 ohms would become 1M.
Anyhow... a resistor with the markings brown, black, orange, gold will
translate as follows:
1 (brown) 0 (black) x 1,000 = 10,000 with a tolerance of +/- 5%
Any resistor of over 1000 ohms is typically shorted using the letter K. For
instance, 1,000 would be 1K; 3,900, would translate to 3.9K; and 470,000 ohms
would become 470K.
Values of ohms over a million are represented using the letter M. In this case,
1,000,000 ohms would become 1M.
As the name implies, resistors add resistance to the circuit and reduces the flow of electrical current. It is represented in a circuit diagram as a pointy squiggle with a value next to it.
The different markings on the resistor represent different values of resistance. These values are measured in ohms.
Resistors also come with different wattage ratings. For most low-voltage DC circuits, 1/4 watt resistors should be suitable.
You read the values from left to right towards the (typically) gold band. The first two colors represent the resistor value, the third represents the multiplier, and the fourth (the gold band) represents the tolerance or precision of the component. You can tell the value of each color by looking at a resistor color value chart.
Or... to make your life easier, you could simply look up the values using a graphical resistance calculator.
Anyhow... a resistor with the markings brown, black, orange, gold will translate as follows:
1 (brown) 0 (black) x 1,000 = 10,000 with a tolerance of +/- 5%
Any resistor of over 1000 ohms is typically shorted using the letter K. For instance, 1,000 would be 1K; 3,900, would translate to 3.9K; and 470,000 ohms would become 470K.
Values of ohms over a million are represented using the letter M. In this case, 1,000,000 ohms would become 1M.
Anyhow... a resistor with the markings brown, black, orange, gold will translate as follows:
1 (brown) 0 (black) x 1,000 = 10,000 with a tolerance of +/- 5%
Any resistor of over 1000 ohms is typically shorted using the letter K. For instance, 1,000 would be 1K; 3,900, would translate to 3.9K; and 470,000 ohms would become 470K.
Values of ohms over a million are represented using the letter M. In this case, 1,000,000 ohms would become 1M.
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