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Christmas tree with smd leds controlled by PROCESSOR

Santer Claws

Bcoz I like computers ive been asked to build a tree with lights.

Anybody got an idea where i can start. What processor? What speed? How much memory?

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  • 0 in reply to erik malund

    Unless we are talking about a very small tree, I would assume that each processor pin would have to control multiple LEDs (or lamps) so a couple of open-collector/open-drain transistors or buffer chips would help greatly. Then you may also connect several LEDs or lamps in series and drive them from a voltage significantly higher than the uC supply voltage. For example 5 LED and a resistor in series driven from 12VDC, or you could use colored 12V light bulbs.

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  • 0 in reply to erik malund

    Unless we are talking about a very small tree, I would assume that each processor pin would have to control multiple LEDs (or lamps) so a couple of open-collector/open-drain transistors or buffer chips would help greatly. Then you may also connect several LEDs or lamps in series and drive them from a voltage significantly higher than the uC supply voltage. For example 5 LED and a resistor in series driven from 12VDC, or you could use colored 12V light bulbs.

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