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Author Topic: reason for no on/off switch on arduino?  (Read 1440 times)
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The boards I like using most have a jumper on them to switch between USB and regulator.  It's real easy jut to pull it off to power down.  Sometimes you can make things too easy and you loose a little versatility in the process.
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... I have finished projects in enclosures that use a wall wart and the DC jack. No simple way to turn it off except unplug it, which may wear out the jack over time.  ...

How about splicing an inline switch (such as a rotary one) into the lead from the wall wart?  Works for me :-)
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you have to handle naughty voltages with care. 


extreme caution !

as for the switch. with multiple power input sources, it seems that the additional circuits for a single cut off, or multiple off switches becomes unwieldy.

also, the cost of switches becomes high. and reliability in mechanical things in miniature, is low.
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Valencia, Spain
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Get one of these:


* 7015.jpg (46.44 KB, 285x315 - viewed 4 times.)
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A jumper placed at the right point in the circuit would cost $0.03.  Probably less in the quantities they make Arduinos.
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A jumper placed at the right point in the circuit would cost $0.03.  Probably less in the quantities they make Arduinos.

The boards I like using most have a jumper on them to switch between USB and regulator.  It's real easy jut to pull it off to power down.  Sometimes you can make things too easy and you loose a little versatility in the process.

And that would lead to another question that would be asked over and over and over:
"I lost my little do-hickey. Anyone know where I can get more?"

Anybody who needs a switch can rig one up.
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Valencia, Spain
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A jumper placed at the right point in the circuit would cost $0.03.  Probably less in the quantities they make Arduinos.

Pulling a little jumper off the board then putting it back on every time I change a wire would annoy me intensely.

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And that would lead to another question that would be asked over and over and over:
"I lost my little do-hickey. Anyone know where I can get more?"

Anybody who needs a switch can rig one up.

They can rig up a switch but they can't take care of a shorting block?

Oh, right.  I almost forgot 2-things:
 1) Thou shall never speak against the design of the Arduino gods, for it is flawless.
and
2) People who buy genuine Arduinos are really that stupid.

You know, I'm no genius (I'm sure you'll agree with that), but I've... a) never lost a jumper off the boards I have,  and b) Long ago I bought a big bag of them on eBay for about $2 for the time I should ever need one.
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A jumper placed at the right point in the circuit would cost $0.03.  Probably less in the quantities they make Arduinos.
Pulling a little jumper off the board then putting it back on every time I change a wire would annoy me intensely.

I could see you doing things that way.

So, unplugging your wall wart every time you change a wire, or reaching to toggle a soon to wear out switch every time you change a wire is a real improvement?

Okay, you win.
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Pulling a little jumper off the board then putting it back on every time I change a wire would annoy me intensely.
reaching to toggle a soon to wear out switch every time you change a wire is a real improvement?

Switches can be rated in the millions of uses. That's more than the flash memory on several Arduinos.

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Oh, right.  I almost forgot 2-things:
 1) Thou shall never speak against the design of the Arduino gods, for it is flawless.
and
2) People who buy genuine Arduinos are really that stupid.

1) I don't see it that way, I just don't see the merit of using a shunt for a power switch (in this context or probably any other).
Why get so worked up? It's not as though the "Arduino gods" give a monkey's what I think and will pan your most excellent idea based on my comments.
2) I don't get the inference. How does losing a shunt make anyone stupid?
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1) I don't see it that way, I just don't see the merit of using a shunt for a power switch (in this context or probably any other).
Why get so worked up? It's not as though the "Arduino gods" give a monkey's what I think and will pan your most excellent idea based on my comments.
It's simple, cheap and easy to use.  Of course, this does not cover Fungus' application of swapping it on and off for every wire or other change (ad minutia) you make.  However, I have boards that have the facility and it really is handy to cut the power when you need to.  No additions required.  If this is really confusing you and our Spanish compatriot, I could arrange a video on how the whole complicated and outrageously difficult to fathom thing works.

2) I don't get the inference. How does losing a shunt make anyone stupid?
Look up the word 'facetious'.  It applies to the comment.
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I guess you had the "last word" a year ago and then somebody dug this subject back up.
I hope it will go back to sleep for another year.
Good grief.
I'm not confused. And "no, thanks" on the youtube part. 
I understood your brilliant intent. I just disagree with your assumptions - so I'll go set myself on fire.
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Shelby Township, Disco, Michigan
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Use the On/Off switch on your PC.




Just kidding......
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Uuughhh!

Buy or build a  capacitive touch sensor!     

Wear that out!
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