Number of posts : 869
Registration date : 2009-01-18
Age : 51
Location : Rolla, Missouri USA
|Subject: Mechanical Limit Switch Application Note now available Mon Jul 29, 2013 7:25 am|| |
Good morning everyone,
I have been working on this application note in my spare time: Application Note 2
I want to add to it in the future to show how hardware noise filtering works and some other things. For now I wanted to get it out there and get some feedback. If you have nay questions or spot a typo just let me know.
Jeff Birt - Soigeneris.com
Proud Dealer of Taig, Precisebits, Gecko 540,
Number of posts : 89
Registration date : 2011-07-31
Location : Toronto, Ontario, Canada
|Subject: Re: Mechanical Limit Switch Application Note now available Sun Aug 11, 2013 9:55 pm|| |
Interesting! I like how you did the analysis on the turn on position of various switches.
Number of posts : 5
Registration date : 2013-08-11
Age : 49
Location : Mpls, MN
|Subject: Re: Mechanical Limit Switch Application Note now available Mon Aug 12, 2013 8:25 am|| |
Very good write up. Informative and in depth without going all "engineering" on the reader.
I do a lot of tinkering with microcontrollers and noisy switches are a common issue. I prefer to debounce in hardware, as most software debounce is often provided by taking the mean of rapid samples of the switch state and is more difficult or RAM consuming on small memory microcontrollers.
An example I use on microswitches is a 10uF cap across the contacts. If interfacing with CMOS or a picky TTL I would send that thru an inverter the clean it up. Timing generally is a non issue on most circuits I have used it on.
|Subject: Re: Mechanical Limit Switch Application Note now available || |