LED

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Fractal Cat
Posts: 12
Joined: Thu Jun 04, 2015 12:51 am

LED

Post by Fractal Cat » Mon Aug 01, 2016 1:43 am

Hi,

How can I make an LED fade in and out ?

Thanks

FC.

David
Posts: 217
Joined: Sun Oct 04, 2015 6:18 pm

Re: LED

Post by David » Mon Aug 01, 2016 5:33 pm

Two main methods, but you could do this with a Pi if needed - it depends on the detail of your application.
1. A variable resistor in the feed from a fixed DC source, but remember to have a fixed resistor always in series to limit the maximum current.
2. a switched supply with variable mark/space ratio (often a 555 chip suitably wired - circuits are easily available on the web)
Hope this helps.

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