Submission, CMOS 555 Long Duration LED Flyback Flasher

Thread Starter

Wendy

Joined Mar 24, 2008
22,155
The two posts in front are the article, I kept the others as part of the conversations. I never turn down a little help from my friends. You might come off as crusty now and again, but I value your input.

The article has been submitted, BTW. I don't know when it will be merged into the book. At this point it is in Dennis's hands.
 

Thread Starter

Wendy

Joined Mar 24, 2008
22,155
They were earlier, but since I rejected them they wound up in later posts. LEDs were killed in the making of this project. :D

You have to remember that the schematic in the article is the final schematic, not the earlier ones. It is the one that worked. I don't hide my mistakes, I don't change posts to hide them either.
 

Thread Starter

Wendy

Joined Mar 24, 2008
22,155
OK, one last note, I took pin 4 of the second timer to Vcc to turn on the LEDs full time and then measured the current. It was 54.4ma, probably not the best number for these LEDs but it works. I captured the data and posted it here so I can tear down the protoboard, and this was one last valid question I had about the circuit. I guess the next measurement tis the current through the LEDs themselves.
 
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