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<^< Adding Outputs | Course index | Using LED's >^>

Introduction to Microcontroller Programming * Course Index * Introduction * About the Author * About this Course * Feedback * Course Navigation * Quick Course Navigation * How to use this Course * Acronyms Used and Course Conventions

About PICmicro Chips * What is a PICmicro? * Microcontrollers * Digital versus Analogue * Inputs and Outputs * Memory * Programming * 16F1937 Architecture

Clocking Your PICmicro Devices * Introduction * The Clock Circuit * Clock Settings * Clock Confusion

E-Blocks * Introduction to E-blocks * Using E-blocks * E-blocks Boards

Flowcode Step By Step * Introduction to Flowcode * Basic Flowcode Functions * Digital Outputs * Digital Inputs * Basic Loops * The LCD Display * Binary Numbers * Decisions * Goto (Connection Point) * 7-Segment Displays * Software Macro * Strings and Memory * A Simple Hi-Fi

PICmicro Projects * Introduction to PICmicro Projects * Construction Methods * Choosing a Power Source * Adding Inputs * Input Conditioning * Adding Outputs ##

LED's ## Using LED's ## 7seg Displays ## LCD Displays ## Using LCD Displays ## Buzzers / Sounders ## Motors ## Stepper Motors ## Solenoids * Adding Drivers

Labs * Introduction and Lesson Plan * 1. Output * 2. Delay * 3. Connection Point * 4. Calculations * 5. Loop * 6. Input * 7. Decision * 8. LCD * 9. Keypad * 10. Analogue + EEPROM * 11. Software Macro * 12. External Interrupt * 13. Timer Interrupt

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LED's

<^< Adding Outputs | Course Index | Using LED's >^>(:nl:)

LED's (Light Emitting Diodes) are tiny crystals of a semiconductor, which give off light when an electric current passes through. They are very efficient devices, as almost no heat is generated in the process, leading to much longer battery life.

'Standard' LED's are low current devices, which produce relatively low levels of illumination, and are used as indicators rather than light sources.

You can use a standard LED:

as a 'power-on' indicator to show that a system is currently connected to a power supply; as an 'armed' indicator to show that some function of the system is active; as a sequence indicator, to show which stage of a sequence of operations is currently under way; as a simple test instrument to show whether an output of the system under development is at a high or low voltage, (logic 1 or logic 0,) during the testing stage. LED's are available in a wide range of formats, from pin-point sized single LED's, to arrays of ultra-bright LED's, used in message display panels, and traffic lights.

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Page last modified on August 26, 2011, at 09:56 AM