Touch Key 555 (CB1278E)

Details

Published: Monday, 05 November 2018 21:36

Written by Newton C. Braga

   We found in an old documentation how to use a 555 as a monostable key. The circuit should not be powered by a transformerless source. The 7555 (CMOS) is more sensitive in this type of application. The circuit can be used as a shield for microcontrollers.