Hello and welcome to SparkFun! Trying to contact us? For general support questions please utilize our chats and email options and for technical support questions please utilize our forum at forum.sparkfun.com.

Member #307167

Member Since: March 5, 2012

Country: United States

  • that's it. Thanks.

  • No, I meant the rocker/pushbutton switch used for display selections.

  • Where can I get that small rocker switch you use in the video?

  • The 74HC4067 is an analog multiplexer. Referring to the data sheet shows that there are NO internal pull-up or pull-down resistors. Without pull-up resistors to 3.3V, the inputs and output float. This would cause the false-triggers or no triggers reported by some users. As 'zip' pointed out earlier, connecting a 1K pull-up to the output of the multiplexer fixes this condition. But that is only part of the story. The 1K pull-up is only connected to an input when that input is selected. This fixes the "bad-trigger" problem but still allows the unselected inputs to float into their linear region. This causes high current consumption. Some users report the regulator getting hot.

No public wish lists :(