Using the 555 timer as an external clock for the Arduino
The Need for an External Clock
Courtesy/Thanks to: Jeff
Description: Often when I’m programming the Arduino, I can be a bit sloppy about time handling. I’ll throw in a delay(1000) without really thinking about it. And, for the most part, that works just fine. The delay() is just to “slow things down a bitâ€, and I could just easily have written delay(1111) and not really noticed anything different.
There are times, though, when precision counts.
Read full story at: http://totusterra.com/index.php/2009/10/31/using-the-555-timer-as-an-external-clock
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