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SparkFun Electronics will be closed on July 3rd, 2015 in observance of Independence Day. Any orders placed after 2:00pm MT on July 2nd will be shipped out after the weekend. Thanks!

introp

Member Since: November 10, 2008

Country: United States

  • A microcontroller is certainly not the simplest in most cases. Look at the trusty old 555 timer. Wire it up in monostable (one-shot) mode and it will do exactly what you describe with only four components (one 555 chip, one resistor, one large cap, and one small cap). Very long accurate pulse times are difficult to do because of leakages, etc., but for many applications that don’t require second-level precision on a 30-second pulse, a 555 is the tops.

No public wish lists :(