Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Q&A

Post History

71%
+3 −0
Q&A Standardized way of measuring AC line frequency

The simplicity of zero-crossing measurements is attractive. Regarding "Full period" zero crossing (i.e. time between rising-zero-crossings, or between falling-zero-crossings), compared to "half pe...

posted 6mo ago by Pete W‭  ·  edited 6mo ago by Pete W‭

Answer
#3: Post edited by user avatar Pete W‭ · 2024-05-15T15:02:07Z (6 months ago)
  • The simplicity of zero-crossing measurements is attractive.
  • Regarding "Full period" zero crossing (i.e. time between rising-zero-crossings, or between falling-zero-crossings), compared to "half period" zero crossing measurement:
  • Full-period has the benefit of being less sensitive to DC offset. I.e. if there were a DC offset, or a low frequency were superimposed, then every other half-period would appear a little shorter/longer than the one just before it. Of course any potential issues arising from that could be ironed out digitally too.
  • The simplicity of zero-crossing measurements is attractive.
  • Regarding "Full period" zero crossing (i.e. time between rising-zero-crossings, or between falling-zero-crossings), compared to "half period" zero crossing measurement:
  • Full-period has the benefit of being less sensitive to DC offset. I.e. if there were a DC offset, or a low frequency were superimposed, then every other half-period would appear a little shorter/longer than the one just before it. Of course any potential issues arising from that could be ironed out digitally too, in the code.
#2: Post edited by user avatar Pete W‭ · 2024-05-15T15:01:46Z (6 months ago)
  • The simplicity of zero-crossing measurements is attractive.
  • Regarding "Full period" zero crossing (i.e. time between rising-zero-crossings, or between falling-zero-crossings), compared to "half period" zero crossing measurement:
  • Full-period has the benefit of being less sensitive to DC offset. I.e. if there were a DC offset, or a low frequency were superimposed, then every other half-period would be a little shorter than the one just before it. Of course any potential issues arising from that could be ironed out digitally too.
  • The simplicity of zero-crossing measurements is attractive.
  • Regarding "Full period" zero crossing (i.e. time between rising-zero-crossings, or between falling-zero-crossings), compared to "half period" zero crossing measurement:
  • Full-period has the benefit of being less sensitive to DC offset. I.e. if there were a DC offset, or a low frequency were superimposed, then every other half-period would appear a little shorter/longer than the one just before it. Of course any potential issues arising from that could be ironed out digitally too.
#1: Initial revision by user avatar Pete W‭ · 2024-05-15T15:00:39Z (6 months ago)
The simplicity of zero-crossing measurements is attractive. 

Regarding "Full period" zero crossing (i.e. time between rising-zero-crossings, or between falling-zero-crossings), compared to "half period" zero crossing measurement:

Full-period has the benefit of being less sensitive to DC offset. I.e. if there were a DC offset, or a low frequency were superimposed, then every other half-period would be a little shorter than the one just before it. Of course any potential issues arising from that could be ironed out digitally too.