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How do you calculate the resistance of a SMD resistor?

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How do you calculate the resistance of a SMD resistor?

It is based on the E96-series, thus aimed at resistors with 1% tolerance. Examples of converting EIA-96 markings to a resistance value: 01A ⇒ Code 01 = 100 with Multiplier A = 1 ⇒ 100 x 1 = 100 Ω ±1% 38C ⇒ Code 38 = 243 with Multiplier C = 100 ⇒ 243 x 100 = 24,300 Ω ±1%

How do I calculate what resistor I need?

We’ll use the following formula to determine the resistor value: Resistor = (Battery Voltage – LED voltage) / desired LED current. For a typical white LED that requires 10mA, powered by 12V the values are: (12-3.4)/. 010=860 ohms. To use several LEDs in parallel, sum the current values.

Can I use SMD resistor with normal resistor?

Yes. Just make sure you use the same resistor value with a power rating equal or greater than the smd part (which should be easy) and bend the leads to fit the solder pads of the smd part and solder it in place after removing the smd part.

Can you replace SMD resistor with normal resistor?

It is possible to replace an SMD resistor with a larger one, and it can all be done with a regular soldering iron. The short description of how to do this is to remove the chip by adding solder while pushing on it with the iron.

What size resistor do I need for 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 is half watt resistor?

A common ½W resistor measures about 9.2mm across, while a smaller ¼W resistor is about 6.3mm long. A half-watt (½W) resistor (above) sized up to a quarter-watt (¼W). Surface-mount resistors are usually tiny black rectangles, terminated on either side with even smaller, shiny, silver, conductive edges.

How do I read SMD components?

There are two methods to indicate the resistance value on the SMD resistors’ appearance. 1. In Arabic numbers: the first two numbers indicate the absolute numbers of the resistance value, and the last number means the power of 10. For example, 103 means 10000Ω, 391 means 390Ω, 473 means 47000Ω.

What is the difference between SMD resistor and normal resistor?

An SMD resistor is a type of resistor that has been designed to be surface mounted. These SMD resistors are typically much smaller than traditional resistors, thus taking up much less space on a circuit board. The SMD part of “SMD Resistor” stands for Surface Mounted Device.

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