When you want to prototype electronics, you'll need resistors. We've put together a set of some of the most commonly used resistor values for digital electronics in this neat little resistor set.

The kit comes with standard 1/4W Through-the-hole resistors suitable for breadboards and perfboards. There are 20 of each value, and each value is packed in a clearly labelled plastic bag.

220Ω
Works well with most standard red LEDs as a current limiting diode.

560Ω
Also good with LEDs when you want it to be a bit dimmer, for instance for an unobtrusive power led.

1kΩ
This is the MacGyver of resistors for electronic prototyping, just a general all-round value you'll find yourself reaching for a lot. Also useful as the base resistor of a transistor.

2kΩ
Combine this with a 1k resistor and you can build a voltage divider that turns 5V into 3.3V. Handy for when you have just one component that doesn't handle 5V

4.7kΩ
Useful as a pull-up resistor. Commonly used for the TWI/I2C bus and the onewire bus.

10kΩ
Also useful as a pull-up resistor. Commonly used on the reset pin of microcontrollers. A 10k pull-up will have a smaller leakage current than a 4.7k pull-up, but most of the time they are interchangeable.