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Old 07-16-2018, 09:08 PM   #1
ljp
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"I" & "O" designation?

What do the "I" & "O" letters found on the propane and electrical buttons on a bathroom panel indicate when depressed.
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Old 07-16-2018, 09:47 PM   #2
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The short of it.....I = on. O = off.
The long of it. In the world of digital electronics logic, a component is either on or off....vs. analog where the value could be anywhere between on or off. Example is your 12 volt system. Digital, it would either be 0 volts or 12 volts. In the analog world, it could be any value between 0 and 12.....5.3, 6.9, 11.1, etc. So consequently, many devices that are simply either on or off have adapted to the "I" & "O" for showing switch position.....which also takes up less room on the device than printing On or Off.
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Old 07-17-2018, 05:35 AM   #3
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I believe it's actually binary, 1 (one) and 0 (zero)
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Old 07-17-2018, 05:51 AM   #4
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I believe it's actually binary, 1 (one) and 0 (zero)
Binary describes a numbering scheme in which there are only two possible values for each digit: 0 and 1. The term also refers to any digital encoding/decoding system in which there are exactly two possible states. In digital data memory, storage, processing, and communications, the 0 and 1 values are sometimes called "low" and "high," respectively. Thus, the "0" represents zero voltage in the case of the switch and conversely, the "1" represents 12 volts in the above mentioned switch.

So, it all boils down to....
0 = off
1 = on
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Old 07-17-2018, 05:55 AM   #5
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For the heck of it I just looked it up and they are actually symbols, not numbers or letters. I still think the origin is binary.
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Old 07-17-2018, 06:50 AM   #6
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For the heck of it I just looked it up and they are actually symbols, not numbers or letters. I still think the origin is binary.
Digital electronics is based on the binary numbering system, as I tried to explain above. In digital, a device has only two possibilities....on or off...nothing in between those values. On is represented as a binary 1, and off is represented as a binary 0

Wow, what a simple question and we've turned it into a science lesson......sorry.
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Old 07-17-2018, 07:15 AM   #7
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Wow, you're misunderstanding what I'm saying, I'm talking about the rational for EIC picking those symbols.

I've been working with digital systems since 1971, you don't need to give me a lesson on it.
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Old 07-17-2018, 08:03 AM   #8
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Am I confused or aren't you both saying basically the same thing? Back when we programmed memory using binary, 1 was on, 0 was off (or high/lo). We then took those values and converted to hex generally.

The IEC refers to them as "symbols" but I have yet to find how they determined those particular "symbols". It seems that the general consensus is the binary use as 1(I) = on and 0(O) = off, which is known internationally, was the reasoning; right or wrong I don't know.

I appears the IEC database is no longer available unless you pay for an updated list which I don't have. Below is a link that discusses adding the IEC symbols to Unicode. They touch on the symbols here as well but do not discuss the origins or thinking behind their selection.

https://www.unicode.org/L2/L2014/140...wer-symbol.pdf

Just thought I would throw that in for some light Tuesday reading. Someone on the forum may know all about the origins of I/O but.....I don't. Not looking for a "lesson" or "schooling", just sharing a little info. The critical thing is that we know what they mean. How they came to be is another question...…...
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Old 07-17-2018, 08:32 AM   #9
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Am I confused or aren't you both saying basically the same thing? Back when we programmed memory using binary, 1 was on, 0 was off (or high/lo). We then took those values and converted to hex generally.

The IEC refers to them as "symbols" but I have yet to find how they determined those particular "symbols". It seems that the general consensus is the binary use as 1(I) = on and 0(O) = off, which is known internationally, was the reasoning; right or wrong I don't know.

I appears the IEC database is no longer available unless you pay for an updated list which I don't have. Below is a link that discusses adding the IEC symbols to Unicode. They touch on the symbols here as well but do not discuss the origins or thinking behind their selection.

https://www.unicode.org/L2/L2014/140...wer-symbol.pdf

Just thought I would throw that in for some light Tuesday reading. Someone on the forum may know all about the origins of I/O but.....I don't. Not looking for a "lesson" or "schooling", just sharing a little info. The critical thing is that we know what they mean. How they came to be is another question...…...
^^^^ Agreed!
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Old 07-17-2018, 08:44 AM   #10
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Wow, you're misunderstanding what I'm saying, I'm talking about the rational for EIC picking those symbols.

I've been working with digital systems since 1971, you don't need to give me a lesson on it.
Bill, I certainly wasn't trying to offend anyone.....and I darn sure didn't know your job history or experience. And you're right, I misunderstood the point you were trying to make about the rational for EIC using those symbols. I believe I read at one time the reasoning behind it was to replace on and off with internationally recognized symbols that crossed language barriers, kind of like the circle with a red slash through it and a symbol inside the circle.
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Old 07-17-2018, 09:11 AM   #11
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I O Informed Opinion? Sorry, couldn't help myself
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Old 07-17-2018, 11:05 AM   #12
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xrated , all is well.
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Old 07-17-2018, 11:06 AM   #13
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"There are 10 kinds of people ... those that understand binary, and those that don't"
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Old 07-17-2018, 11:15 AM   #14
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Originally Posted by gkainz View Post
"There are 10 kinds of people ... those that understand binary, and those that don't"
And that simply ignores the 1/3 that are confused..... Must be exclusionary rather than inclusionary (or do we add confusionary) ???
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Old 07-17-2018, 11:47 AM   #15
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And that simply ignores the 1/3 that are confused..... Must be exclusionary rather than inclusionary (or do we add confusionary) ???
English sub-titles please!
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Old 07-17-2018, 11:48 AM   #16
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Thanks for all the feedback.

Now I hope I remember not to push the wrong binary switch at the wrong time and send myself flying into binary (or digital or logic, etc., etc., heaven).

As is often heard, KISS. I'll settle for "On" & "Off" any time.....
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Old 07-23-2018, 05:20 PM   #17
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My head hertz....................... Lol!
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Old 07-23-2018, 11:21 PM   #18
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My head hertz....................... Lol!
You must not have much capacitance for these types of discussions. Ohm my!
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Old 07-24-2018, 03:52 AM   #19
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Some folks put up a lot of resistance to these discussions.
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Old 07-24-2018, 03:55 AM   #20
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This thread has become "shockingly" off topic!
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