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Power LED controller

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toninph

Joined Dec 10, 2010
14
The object is to switch a power LED from a (low) standby current level to a selectable higher level. Problem seems to be that the darlington pair (2x BC337) does not act as a real on/off switch but tends to limit the output current in stead. What could be a better solution? Any (other) suggestions are welcome.
 

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