# How do you calculate fixed resistors?

## How do you calculate fixed resistors?

Your units are ohms for resistance, volts for voltage, and amps for current. This formula tells you that your resistance is always equal to your voltage divided by the current. You can also say that your voltage is equal to your current multiplied by your resistance, or V = IR in equation form, with R = V / I.

**How do I find my SMD value?**

Standard-tolerance SMD resistors use a 3-digit code to mark the resistance value on the part. The first two numbers will indicate the significant digits, and the third will be the multiplier. ‘R’ is used to indicate the position of a decimal point.

**How do you calculate resistor color code?**

The formula for the three-band resistor color code is – 1st digit. 2nd digit. third digit x Multiplier = 1.0. 3 X100 = 10.3-kilo ohm ±5% 100 ppm/oc.

### What is fixed value resistor?

A fixed resistor is an electrical resistor with a fixed value. Resistors receive a voltage and restrict the amount of current that flows through it, to create a different voltage and reduce power by turning it into heat. Fixed Resistor. Fixed resistors are the most common type of resistor in electronic circuits.

**What are the 3 types of fixed resistors?**

There are three main types in thick film resistors like Fusible resistors, Cermet film resistors, and Metal oxide film resistors.

**How do you read SMD resistance value?**

Reading a SMD resistor code

- the first two numbers indicates the significant digits for the resistance, e.g. “22” indicates 22 ohms.
- the third number will be a multiplier that must be multiplier by the first two numbers, or will indicate how many zeros should be added to the first two numbers.

## How do you measure SMD resistor?

The size of SMD resistors is indicated by a numerical code, such as 0603. This code contains the width and height of the package. So, the imperial code 0603 indicates a length of 0.060″ and a width of 0.030″. The SMD package code can be given in either imperial or metric units.

**What size resistor should I use with an LED?**

LEDs typically require 10 to 20mA, the datasheet for the LED will detail this along with the forward voltage drop. For example an ultra bright blue LED with a 9V battery has a forward voltage of 3.2V and typical current of 20mA. So the resistor needs to be 290 ohms or as close as is available.

**What resistor do I need for RGB LED?**

Resistor values are typically around 100-330 ohms. The three LEDs inside a single RGB LED often have different operating voltages and current levels, so check the datasheet. A red LED typically needs about 2 volts. The voltage drop tends to rise as the frequency of the light wave increases.

### What color is a 470 ohm resistor?

470 Ohm Resistor Color Code: Yellow, Violet, Brown, Golden. Resistance: 470 Ohm, Power Rating: 2 Watts, Approximate Maximum Current: 65.23mA .

**How do I find the color code?**

Most often though, the paint code will be found on a plate/sticker inside the driver’s door or inside the glovebox. See our diagram below for the most common places to check! Once you have this information, you will be able create an exact match of the paint that you require.