RetroFed Forum
Your home away from modern life.
Search Categories Forum list Register Log in
About RetroFed
RetroFed

Welcome to the nostalgia-filled piefed instance of yesteryear.

Open Registration with Application questionnaire.

If you have a question or comment you can post in !meta@retrofed.com or message @DosDude@retrofed.com or @Die4Ever@retrofed.com

In case of downtime and/or emergency, we will post updates on @DosDude@mastodon.social

Some rules we try to uphold:

  • Be civil. Bigotry is not welcome. This includes (but is not limited to): transphobia, queerphobia, racism, ageism and ableism. We do not promote hate.
  • Communities need to be Retro or Retro-adjacent.
  • Please don't upload pornographic content. (use an external image host for that)
72 registered users
Administrators: DosDude, Die4Ever
Visit retrofed.com
It's always a floating input.
Post Reply RetroFed Forum Forum Index » Arduino
AuthorMessage
MapleEngineer lemmy.ca MapleEngineer@lemmy.ca
Joined: 2023-06-14
Quote

If your circuit is behaving weirdly, switching on when you touch a wire or move your hand over the circuit you almost certainly have a floating input. You can solve this problem with a pull-up resistor. Many AVRs have built-in pull-up resistors that you can turn on using code.

In Sketch:

pinMode(2, INPUT_PULLUP);

In BascomAVR:

Config Portb.1 = Input
Set Portb.1

There's a great article at SparkFun about Pull-up Resistors.
2   Original
Post Reply
Back to top
Powered by PieFed · PieBB frontend · All times are Europe/Amsterdam