-
Categories
-
Platforms
-
Content
No, the LM555 is the standard bipolar version.
One CMOS version is the LMC555.
Following may be of interest, attached :
If you want sophisticated timer solutions :
Regards, Dana.
If you want sophisticated timer solutions :
Pulse Sequence Generator / Smart Timer
Often users, developers, hobbyists need timed and qualified event generators, many resorting to 555 timers and the like. The venerable 555 has had a long run but its limited in accuracy and capability. This approach uses block language to create...
www.electro-tech-online.com
Regards, Dana.
LOL...I love the statement "limited in Accuracy and Capability"
Here is Wikipedias take on this:
555 was designed in 1971 by Hans Camenzind. A favorite for many engineers, the 555 is still in widespread use due to its ease of use, low price, and stability.
there are still BILLIONS sold every year, with hundreds of schematics out that use this chip, and god knows how many manufacturers. I can get a package of 10 for .99 cents, and I myself probably use 100 a year.
"Sophistication" does not equate to better!!
Please dont blow smoke up my Butt, and call it Air Freshener!
Here is Wikipedias take on this:
555 was designed in 1971 by Hans Camenzind. A favorite for many engineers, the 555 is still in widespread use due to its ease of use, low price, and stability.
there are still BILLIONS sold every year, with hundreds of schematics out that use this chip, and god knows how many manufacturers. I can get a package of 10 for .99 cents, and I myself probably use 100 a year.
"Sophistication" does not equate to better!!
Please dont blow smoke up my Butt, and call it Air Freshener!
If you dont care about that its a great chip to use.
But if you want a 21'st century timer, to do something like this, it sucks.
Pulse Sequence Generator / Smart Timer
Often users, developers, hobbyists need timed and qualified event generators, many resorting to 555 timers and the like. The venerable 555 has had a long run but its limited in accuracy and capability. This approach uses block language to create...
www.electro-tech-online.com
You can do that with vacuum tubes, but I would advise against it. You would probably
need a dirigible hanger to house all the circuits and power supplies to do it.
Curious, can you show a reference that the 555 is still shipped in billions / year ?
Would love to see the facts. "It was said", ref made in wiki page about shipments,
is not a fact.
Funny how fewer and fewer manufacturers and variations being built....
Regards, Dana.
Last edited:
"Curious, can you show a reference that the 555 is still shipped in billions / year ?
Would love to see the facts."
Again, Google can be your best friend...Wikipedia quote, cut and pasted:
"it was said that over a billion 555 timers are produced annually by some estimates, and that the design was "probably the most popular integrated circuit ever made".[5]"
Some other place (cut and pasted)
"Introduced in 1971 by the American company Signetics, the 555 is still in widespread use due to its low price, ease of use and stability. It is made by many companies in the original bipolar and low-power CMOS types. According to an estimate, a billion units are manufactured annually. It has been noted as "probably the most popular integrated circuit ever made".[5]"
Here endeth my proof.
Thank you, Kim
p.s-My next project WILL be vacuum -tube based, but thank you for the invite anyways
Thank you,
Kim
Now this is what I call serious accuracy (LMC555) :
And guess what, thats for a precision ideal timing cap placed on it.
Let me know where I can get some of those
Initial accuracy with an electrolytic at just room T probably around +/- 50%.
Dont hear of too many 555 timers in space applications......or life support medical......
Regards, Dana.
And guess what, thats for a precision ideal timing cap placed on it.
Let me know where I can get some of those
Initial accuracy with an electrolytic at just room T probably around +/- 50%.
Dont hear of too many 555 timers in space applications......or life support medical......
Regards, Dana.
""it was said ", oh ya, thats a great factoid. Who said it, what background shipping info
did he/she gather, form what vendors......when.....
Regards, Dana.
dana,
this is a never-ending discussion of me now showing you links to digging up anything other than wikipedia statements, showing you hi-accuracy caps, and resistors.
Your +/- accuracy of 50% is absolutely ridiculous, but I refuse to attempt to spend the time coaxing a already closed mind.
Ill leave it to others, or simply let the case lie.
this is a never-ending discussion of me now showing you links to digging up anything other than wikipedia statements, showing you hi-accuracy caps, and resistors.
Your +/- accuracy of 50% is absolutely ridiculous, but I refuse to attempt to spend the time coaxing a already closed mind.
Ill leave it to others, or simply let the case lie.
Im not here to support/not support wikipedia, Im here to have fun building stuff, as I have for over 50 years, as a hobby, which then became part of a career. Im not here to endlessly support the use of the components I use.
But thank you for your interest.
Kim
The initail tolerance, at room T, on Alum Electrolytics +/- 20% or worse, most offerings.
Many Alum Electrolytic datasheets dont even spec T dependency, its so bad. Check it out.
Then we have this to add on due to T effects, from Vishay or whoever :
So doing the math here due to initial tolerance and T effects ~40%. Thats your wonderful
555 timing accuracy, not counting R affects in the RC that sets timing, or the V affects.
Notice the tolerance column in this selector :
Ugh. And in this day and age 10% is awfull.
Enjoy.
Regards, Dana.
Last edited:
Showing me high accuracy .....
Please do, link to cap data sheet you are using ? Must be a little pricy if high accuracy.....
Regards, Dana.
Similar threads
