The following electronic components are needed to build the simple breadboard circuit. These tolerance values come about because of the manufacturing process of the resistor. Common resistor tolerance values are 5% and 1%. This is because of the resistance tolerance margin. The resistance of a resistor measured on a multimeter will seldom be the exact value that the resistor color code specifies. Note that a 5% tolerance resistor can have a value that is up to 5% above or 5% below its specified value. Look at the display of the multimeter to see the resistance of the resistor being tested. Finally put the other multimeter lead tip on the other resistor lead. Afterwards, put the probe tip of one of the multimeter leads on one of the resistor leads. To measure the resistance of a resistor using a multimeter, first turn the multimeter dial to the Ohms setting. If you have trouble reading a resistor, or just want to check that you read the correct value, then a multimeter set to the Ohms (Ω) setting is helpful. See the basic information on resistors that shows how to read a resistor value. Resistor values are color coded on the body of each resistor. Learn about batteries, resistors and LEDs before starting this tutorial. Also read the five articles that follow the Start Electronics Now article, as can be seen near the top of the menu at the right of this page. You need to know about tools and electronic components before starting this tutorial - if you haven't read the Start Electronics Now! article, then read it now. Prerequisites to Building a Circuit on Breadboard
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