Useful Stuff: Resistor

Resistor is a key component, especially in discrete Electronics. According to Ohm’s Law:

the voltage across resistor equals the current passes through the resistor times the resistance R.

Regarding assembly, there are two types of packaging:
1. Through-hole
2. Surface-mount or SMD
These two types are shown below.

You can find a lot of data about resistors on the Internet. Here, some essential and useful information is collected.

Colors:

To show the value of a through-hole resistor, usually color codes are used.

Tolerance:

Common tolerances of resistors are 5% and 1%. 5% resistors use E24 values and 1% resistors use E96 values. The E-series values table is shown below.

power Rating:

Both through-hole and SMD resistors provides various packaging size regarding power rating. below the package size info for TH and SMD are shown respectively.