MC14490 and Software Debouncing

  • Warren Gay


This chapter examines input devices with mechanical contacts. Switches, buttons, relays, and rotary controls all have contacts that cause trouble for electronic circuits; they are so fast that they see contacts make and break thousands of times per second. If you ignore this aspect of input controls in your design, you could wind up with dysfunctional custom controls for your Pi.


Shift Register Clock Pulse Push Button Hardware Solution Contact Bounce 
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Copyright information

© Warren Gay 2017

Authors and Affiliations

  • Warren Gay
    • 1
  1. 1.St CatharinesCanada

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