×

We will be closed on November 25, 2021 and November 26, 2021 in observance of the Thanksgiving holiday. We will resume normal operations on November 29, 2021. Wishing you a safe and happy holiday from all your friends at SparkFun!

×

Receive a free SparkFun USB Thumb Drive with every order this weekend. Details.

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 :(