74HC14 Schmitt-Trigger Switch Debouncer

A 6-channel Schmitt inverter cleans the bouncy edges off a tactile switch and feeds a clean square wave to your MCU.

Difficulty: Breadboard. Estimated build time: about 25 minutes. Estimated parts cost: about US$2.20. 6-part bill of materials with live supplier pricing. A switch-debouncer built around the 74HC14, a hex Schmitt-trigger inverter.