Resistors
A resistor is a device that opposes the flow of electrical current. The bigger the value of a resistor the more it opposes the current flow. The value of a resistor is given in ohms and is often referred to as its ‘resistance’.
Identifying Resistor Values
| Band Colour | 1st Band | 2nd Band | Multiplier x | Tolerance |
| Silver | ÷ 100 | 10% | ||
| Gold | ÷ 10 | 5% | ||
| Black | 0 | 0 | 1 | |
| Brown | 1 | 1 | 10 | 1% |
| Red | 2 | 2 | 100 | 2% |
| Orange | 3 | 3 | 1000 | |
| Yellow | 4 | 4 | 10,000 | |
| Green | 5 | 5 | 100,000 | |
| Blue | 6 | 6 | 1,000,000 | |
| Violet | 7 | 7 | ||
| Grey | 8 | 8 | ||
| White | 9 | 9 |
| Example: Band 1 = Red, Band 2 = Violet, Band 3 = Orange, Band 4 = Gold | Too many zeros? | ||
| The value of this resistor would be: | kilo ohms and mega | ||
| 2 (Red) 7 (Violet) x1,000 (Orange) | = 27 x 1,000 | ohms can be used: | |
| = 27,000 with a 5% tolerance (gold) | 1,000 ohms =1k | ||
| = 27k ohms | 1,000k = 1M |
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Led
5mm LED Overview
A Super bright 5mm LED is exceptionally bright with a wide beam angle, so they’re suitable for use in your projects, illuminations, headlamps, spotlights, car lighting, models. The 5mm LED can be used anywhere where you need low power, high-intensity reliable lighting or indication. They go quickly into a breadboard and will add that extra zing to your project.
The 5mm T1 3/4 LED is the most common size of LED available.
Connection Note
Please Note: the longer lead indicates the anode, the lead frame arrangement and “cathode flat” on the case flange may be reversed for some LEDs, always use the longer lead as the anode or test the devices first.