555 Timer

via SparkFun
$1.91
SKU SF-COM-09273

This is a common 555 timer/oscillator from TI. A classic for all of those first year circuits projects where you need to blink an LED, generate tone, and thousands of other great beginning projects. Google around for a huge list of resources and example projects.

Features:

  • 4.5V to 16V supply
  • 8-pin DIP package
  • Timing from microseconds to hours
  • Astable or monostable operation
  • Adjustable duty cycle
  • TTL compatible output
  • Sink or source up to 200mA

Documents:Datasheet