Resistors 0.25W Carbon Film Resistor (Pack of 20)

Resistors are a staple of every electronics project.

These are standard 0.25W (1/4W) Carbon Film Resistors, sold in a pack of 20. So a quantity of 1 = a pack of 20.

They are made by Royal Ohm, so are great quality. Proto-PIC’s resistors offer great value for money. They are an essential in your electronics toolbox.

They have a tolerance of 5% and will suit most electronics requirements.

We have all of the typical values in stock, just select your value from the drop down-list and click add to basket.

Use resistors to control the amount of electric current and voltage supplied to different parts of a circuit. Resistors can, for example, control how fast a capacitor charges. They can also ensure that a particular leg of a transistor is supplied with the correct voltage.

The value of a resistor is measured in ohms. One thousand ohms is equal to one kiloohm and one million ohms is one megaohm.

The coloured bands on a resistor provide the value in ohms of the resistor. A resistor has different coloured bands. These coloured bands represent numbers, the multiplier, the tolerance and the temperature coefficient.

Proto-PIC are a UK distributor of Sparkfun. They have a useful guide on resistors, which you can download to understand how to read a resistor. Click on the image below to open the link.

The diagram above shows you how to read the bands to identify its resistance value. The first three coloured bands are numbers. The fourth coloured band shown on the resistor shows you how dependable the given value is. The final band shows the temperature coefficient and the one before it provides the tolerance. As an example, if the tolerance is brown, it means the resistor’s true value is within 1% of the reading.