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How Large a Slot for a Smartphone

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Forum topic by Dave Rutan posted 11-11-2015 05:57 PM 865 views 0 times favorited 29 replies Add to Favorites Watch
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Dave Rutan

1431 posts in 1655 days


11-11-2015 05:57 PM

Topic tags/keywords: smart phone amp question design desk accessory

I’m going to build a desk accessory for three family members based around a passive smart phone amplifier. My only problem is how big to make the slot for the smart phone? I don’t own one and I don’t even know which one(s) the future recipients have. Is there an average or standard size to make the slot to accept a smart phone. I need length and width, but depth would certainly help too.

Below is the sort of thing I’m using as a starting point.

Thanks,
Dave

EDIT: I finally made a project from this idea. It can be found here: [link]

-- Ni faru ion el ligno!


29 replies so far

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CharlesA

3025 posts in 1264 days


#1 posted 11-11-2015 06:04 PM

Interesting idea. 18 months ago it was a lot more straightforward. The smallest I’d make it is the dimensions of an iPhone 6.

dimensions for 6 and 6S: http://www.apple.com/iphone-6/specs/

Then you have all the android possibilities.
Samsung Galaxy dimensions: 142×72.5×8.1 mm (5.59×2.85×0.32 in)
The biggie is the Samsung Note: 153.5 X 78.6 X 8.5 mm

I’d skip the Note and make it big enough for at least a 6S.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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Dave Rutan

1431 posts in 1655 days


#2 posted 11-11-2015 06:26 PM

An added complication is the skins that folks put on their phones. I’m sure they vary in thickness as well. This is a quandary.

And yet these sorts of items are sold ready made. I’ll have to ‘shop’ around and see if they are rated by device or if they just have a big old hole.

-- Ni faru ion el ligno!

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HokieKen

1807 posts in 605 days


#3 posted 11-11-2015 08:37 PM

How about inserts for the “dock”? You might consider cutting a hole big enough to accomodate the largest device on the market then add ~1” to the width because, let’s face it, they aren’t going to get smaller in the future. Then make some blank pieces that fit the hole. Then you can machine blanks tailored to their specific devices and cases/skins. Then when they get a new phone, the insert can be re-machined or a new insert made and the amp doesn’t have to be reworked.

-- Kenny, SW VA, Go Hokies!!!

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Dave Rutan

1431 posts in 1655 days


#4 posted 11-11-2015 09:18 PM

An added complication is the skins that folks put on their phones. I’m sure they vary in thickness as well. This is a quandary.

And yet these sorts of items are sold ready made. I’ll have to ‘shop’ around and see if they are rated by device or if they just have a big old hole.


How about inserts for the “dock”? You might consider cutting a hole big enough to accomodate the largest device on the market then add ~1” to the width because, let s face it, they aren t going to get smaller in the future. Then make some blank pieces that fit the hole. Then you can machine blanks tailored to their specific devices and cases/skins. Then when they get a new phone, the insert can be re-machined or a new insert made and the amp doesn t have to be reworked.

- HokieKen

Since I won’t have access to these once they’re out there, I was hoping for a ‘fits most’ solution. Looks like the off the shelf varety have an aperature of 1/2 inch by 2-1/2 inch. I’m going with 2-3/4 in the hopes that it will help.

-- Ni faru ion el ligno!

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HokieKen

1807 posts in 605 days


#5 posted 11-11-2015 09:28 PM


Since I won t have access to these once they re out there, I was hoping for a fits most solution. Looks like the off the shelf varety have an aperature of 1/2 inch by 2-1/2 inch. I m going with 2-3/4 in the hopes that it will help.

- Dave Rutan

I just measured my iPhone 6S. It’s a shade over 2-5/8” W X a little under 5/16” deep. I’d say it’s probably the most popular phone on the market at present. I’d say your dimensions are safe for most devices but there are definitely a lot out there that are larger.

-- Kenny, SW VA, Go Hokies!!!

View patcollins's profile

patcollins

1420 posts in 2332 days


#6 posted 11-11-2015 09:37 PM

If the person has one of those bullet proof cases that usually doubles the thickness of the phone and ads a 1/4” to the width.

I am going through the same thing now for my own phone. It is one of those things I could make today and then in 6 months get a new phone that doesn’t fit. You could make the top to accept an insert and make a few different size inserts.

View Rick M's profile

Rick M

7934 posts in 1847 days


#7 posted 11-11-2015 11:31 PM

2 more considerations: Speaker locations vary, some are on the bottom and some are on the back.

Not sure if the inside blocks are straight or curved but you should get substantially better performance from a logarithmic curve.

-- http://thewoodknack.blogspot.com/

View oldnovice's profile

oldnovice

5733 posts in 2835 days


#8 posted 11-12-2015 07:17 AM

I did a phone holder some time ago and got the dimensions from the Web site of the phone manufacturer.

I made a model of the phone, a piece of wood with the face and switch locations, in order to properly to locate the cut outs in the cradle.

-- "I never met a board I didn't like!"

View TopamaxSurvivor's profile

TopamaxSurvivor

17676 posts in 3143 days


#9 posted 11-12-2015 07:31 AM

I would make it at least 3.25” wide to fit a Samsung if you don’t know what they have.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View daddywoofdawg's profile

daddywoofdawg

1010 posts in 1042 days


#10 posted 11-12-2015 12:28 PM

You can always say to each,Hey I was thinking about getting a different phone, what type do you have.sounds Innocent,so they won’t suspect anything that way. You could also throw in should I get one of those case for the phone?they may say ya I got one or I don’t have one but would like one.or you don’t really need one.all usable info.

View Dave Rutan's profile

Dave Rutan

1431 posts in 1655 days


#11 posted 11-12-2015 09:23 PM



2 more considerations: Speaker locations vary, some are on the bottom and some are on the back.

Not sure if the inside blocks are straight or curved but you should get substantially better performance from a logarithmic curve.

- Rick M.

In the photo I supplied it looks like the ‘speaker’ is formed with curved cuts. I would perhaps do the same for aesthetics as well as practicality.

-- Ni faru ion el ligno!

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Dave Rutan

1431 posts in 1655 days


#12 posted 11-12-2015 09:28 PM

I want to thank everyone for their input on this.

What I’ve learned is that it’s pretty much impossible to do this as a gift without getting a lot of info that would just raise suspicions and spoil the surprise.

So I’ve decided that I’ll do something simpler for the gifts, without the passive amp ability.

I’ll very likely still make one of these items that I’ve envisioned, but I’ll make it to fit my wife’s iPod. Maybe she’ll even use it on her desk at school.

-- Ni faru ion el ligno!

View CFrye's profile

CFrye

8758 posts in 1307 days


#13 posted 11-14-2015 11:43 PM

I’ve been thinking on this, Dave, and wondered if you could make the opening in a somewhat rectangular funnel shape? Somewhat like the front of your starting point image above? I see you’ve moved on. Hope your wife’s iPod amp works out.

-- God bless, Candy

View Dave Rutan's profile

Dave Rutan

1431 posts in 1655 days


#14 posted 11-15-2015 12:03 AM



I ve been thinking on this, Dave, and wondered if you could make the opening in a somewhat rectangular funnel shape? Somewhat like the front of your starting point image above? I see you ve moved on. Hope your wife s iPod amp works out.

- CFrye

You know what might work? I could make the slot a little larger than it would likely ever need to be and pad the edge or just under it with some sort of foam rubber that would support the phone and seal it from letting sound escape upwards. I’d have to be really clever about it so that the foam wouldn’t block the speaker holes. It’s something to think on.

-- Ni faru ion el ligno!

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CFrye

8758 posts in 1307 days


#15 posted 11-15-2015 12:40 AM

It may be more efficient if the sound didn’t escape around the phone, I don’t know. I do know you can set the phone in an ordinary coffee cup and that works to amplify the sound.

-- God bless, Candy

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