Logic Gates Added To LED Driver Create Camera Privacy Flash Warning

by Cedric Deleglise, applications engineer, and Anthony Do, applications engineer, Integration Associates Inc., Mountain View, Calif., Electronic Design, Sep 11 2008

Focus:
In cell phone cameras, a short 'privacy flash' from the LED flashbulb prior to the full flash may be required to warn subjects their picture will be taken. The privacy flash can be implemented by adding a few logic gates to an flash LED driver circuit.

What you’ll learn:

• How to implement a short 'privacy flash' in flash LED driver circuits

Notes:
ED's Ideas For Design

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