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# Double flash led circuit? Answered

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That must be the most incomplete and therefor useless question for this year....

;)

Double flash led circuit? Double? Double. Double.

Double, double toil and trouble;
Fire burn, and cauldron bubble.

2B or Not 2B = FFFF FFFF FFFF FFFF

Shakespeare was a programmer!

Wow! I wonder if I'm getting this joke. I think I am.

I think any 8-bit number bitwise OR-ed with its bitwise NOT, is FF = 1111 1111

Example:

2B = 0010 1011

NOT(2B) = 1101 0100 = D8

2B OR NOT(2B)
= (0010 1011) OR (1101 0100)

= (1111 1111)

= FF

Of course, Shakespeare is so much better in its original language, that is, in Klingon.
;-P

I think Double flash strobe is for navigation lights. There are
lots of examples you tube videos for this or just watch on one of the earlier
films to see. Example- The sequence would be 0 goes to Led, 1 is disconnected,
2 goes to Led (for flash - flash) 3 & 4 disconnected (for pause) and then
repeat. If you need longer pauses, you could daisy chain multiple 4017 ICs and
possibly reset the count at the desired end of sequence.