Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old January 27th 19, 05:17 AM posted to rec.photo.digital,sci.electronics.repair
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Default Do you have experience with "infrared camera detection" on mobile devices?

On Sat, 26 Jan 2019 13:46:23 -0800, Jeff Liebermann wrote:

o Detect Hidden Camera, version 1.9

Nothing found on the Play store.


I apologize that the app I used is no longer in Google Play.

This is what the "green screen" IR detector screen looks like:
http://www.bild.me/bild.php?file=6487383detect08.jpg
That's actually an infrared camera it's pointed at, but it's apparently off
(likely as wires pulled out when the tree fell down in a windstorm).

Here, for the record, is what the "magnetometer" readout looks like
with the results in both cases when pressed next to radios:
http://www.bild.me/bild.php?file=1112569detect07.jpg
It glows red when you're close to an RF emitter of various sorts:

o (com.techno95.detecthiddencameraandmicrophone)


There's nothing by techno95 remaining on the Google Play Store.
However, you can get the APK if you want to live dangerously:
https://www.apkfollow.com/app/detect-hidden-cameras-and-microphones/com.techno95.detecthiddencameraandmicrophone/


I apologize. Let me use a few apps in my "system" folder to check.
Apparently I installed version 1.9 of that app on November 9th, 2018.

1. This is what "My Apps" freeware shows about that app:
o https://play.google.com/store/apps/details?id=com.spencerstudios.applist
http://www.bild.me/bild.php?file=2539873detect01.jpg

2. This is what "List My Apps" freeware shows about that app:
o https://f-droid.org/en/packages/de.onyxbits.listmyapps/
http://www.bild.me/bild.php?file=3786727detect02.jpg

3. This is what "My App List" freeware shows about that app:
o https://play.google.com/store/apps/details?id=com.projectsexception.myapplist
http://www.bild.me/bild.php?file=4643505detect03.jpg

4. This is what "Applications Info" freeware shows about that app:
o https://play.google.com/store/apps/details?id=com.majeur.applicationsinfo
http://www.bild.me/bild.php?file=1843366detect04.jpg

5. This is what my.own.apps freeware shows (but it's obnoxiousware):
o My Apps https://play.google.com/store/apps/details?id=my.own.apps
http://www.bild.me/bild.php?file=1547742detect05.jpg

6. This is what mobi.usage.appbackup freeware shows about that app:
o App Backup & Restore https://play.google.com/store/apps/details?id=mobi.usage.appbackup
http://www.bild.me/bild.php?file=4930033detect06.jpg

Let us know when you find a URL that I can use for these. Like most
people, I don't like to waste my time Googling for things that you
could easily provide as a URL.


I agree with you that the one I used is no longer easy to find.
Luckily there are plenty of "hidden camera detectors" on Google Play:
https://play.google.com/store/search?q=hidden camera detector

I tested FOUR of them for you, where I recommend the LAST one below.

Here is one called "Hidden Camera Detector".
https://play.google.com/store/apps/details?id=hiddencamdetector.futureapps.com.hidden camdetector
http://www.bild.me/bild.php?file=2460855detect09.jpg
Here it is in use inside my house (I will test it outside later):
http://www.bild.me/bild.php?file=2368161detect10.jpg
That app has ads; but it seems otherwise the same as the old one I have.

Here's another one called "Hidden Camera Detector".
https://play.google.com/store/apps/details?id=com.labinformatics.hiddencameradetector spy
http://www.bild.me/bild.php?file=8525590detect13.jpg
Here it is in use inside my house (notice it uses a "blue screen"):
http://www.bild.me/bild.php?file=8822787detect14.jpg
The magnetometer seems to give slightly more dynamic data:
http://www.bild.me/bild.php?file=5189465detect15.jpg

Here is a lousy sophomoric one called "Anti-Spy:Came Detector"
https://play.google.com/store/apps/details?id=com.mastertech.SpyDetector
http://www.bild.me/bild.php?file=8552496detect11.jpg
It has obnoxious ads; but otherwise, it seems the same as mine.
http://www.bild.me/bild.php?file=8121084detect12.jpg
(I don't recommend this app due to the obnoxities.)

Here is one called "Hidden Camera Detector Camera Scanner":
https://play.google.com/store/apps/details?id=com.teamissolution.hiddencameradetected spycamerasdetectors
http://www.bild.me/bild.php?file=8255824detect16.png
This one uses a "pink viewfinder" & a dial gauge magnetometer:
http://www.bild.me/bild.php?file=7911635detect17.jpg
The magnetometer, like the others, displays what it thinks it sees:
http://www.bild.me/bild.php?file=1341749detect18.jpg
This one seems to have an additional separate graphing function:
http://www.bild.me/bild.php?file=8397455detect19.jpg

Of all those, I like the one I have best since it has zero ads!
But of the ones that are available now, that last one is OK.

One thing I noticed in testing that I didn't realize is that the
"Green Screen" is immaterial. I don't know WHY they change
the color of the screen (do you?).

Some are green. Some are blue. Some red.
Why bother changing the color?

While you're looking, consider that finding a hidden camera requires
that the camera emits something that you can detect with your
smartphone. That limits it to RF emissions of some sort, magnetic
emissions from the lens auto focus electronics, or IR emissions from
some manner of illuminator.


I think the apps all look for the same thing:
o Magnetometer readings, or,
o They just let the IR-sensitive camera do its normal thing.

I "guess" they make the screen "green or red or blue" to give more
contrast? I'm not sure. Do you know why they change the screen color?

You might to better with a spectrum
analyzer (or RTL-SDR dongle) and look for the camera clock oscillator,
LAN clock frequency, or RF backhaul frequency. CCTV cameras are often
powered by 24VAC. Maybe look for a 60Hz AC power field where one
would normally not be expected.


I'm not a professional; I just hike in rough terrain where bad guys are.
That is, I happen to often hike in the hills where pot farmers grow stuff.
http://www.bild.me/bild.php?file=3023286detect20.jpg

I find their "stuff" all the time, fertilizer, hoses, dams, irrigation
tubing, and even hammocks, sleeping bags, weighing scales,
car batteries, etc.

It's very common in these inaccessible mountain areas.

Here's just a bunch of horticulture pots I found yesterday while hiking at
least two or three miles from the nearest road deep off the trails.
http://www.bild.me/bild.php?file=2648541detect21.jpg

Whenever I see _that_ stuff, I know the pot farmers are nearby.
I just want to see if they have hidden cameras in the trees.

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Old January 27th 19, 06:03 AM posted to rec.photo.digital,sci.electronics.repair
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Default Do you have experience with "infrared camera detection" on mobile devices?

On Sat, 26 Jan 2019 15:05:10 -0800, John Robertson
wrote:
Another detector for a hidden camera lens is the reflective LED method.
You wear a headdress of LEDs facing outwards just above your eyes and if
you see bright point reflections then you may have found your hidden
camera (lens)...

This was explored in the book by Cory Doctorow "Little Brother"
https://boingboing.net/2008/05/09/ho...ct-hidden.html
John :-#)#


Nice idea. My initial guess(tm) was that the anti-reflective coating
on the camera lens would umm... not reflect anything:
https://www.instructables.com/id/How-to-locate-pinhole-cameras/
The instructions are value and ambiguous. It took me a while to
decode how it is intended to be used.

The purpose of the toilet paper tube is prevent the user from seeing
the direct light from the flashlight. In order to get a tolerable
reflection, the flashlight should be close and parallel to the toilet
paper tube. Once I did that, I was able to see reflections from some
of my various cameras, but also reflections from anything shiny in the
house. The lenses that did not reflect light were those with clear
plastic lens protectors, which reflected nothing no matter what I
tried. Actually, there was plenty of light scattering, but nothing
that could be seen as a reflected spot. That eliminated some of my
laptop web cameras and outdoor security cameras. How well it works in
the field, I don't know. Probably better than inside my house because
of the lack of spurious reflections.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
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Old January 27th 19, 09:35 PM posted to rec.photo.digital,sci.electronics.repair
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Default Do you have experience with "infrared camera detection" on mobiledevices?

On 1/27/19 12:03 AM, Jeff Liebermann wrote:
On Sat, 26 Jan 2019 15:05:10 -0800, John Robertson
wrote:
Another detector for a hidden camera lens is the reflective LED method.
You wear a headdress of LEDs facing outwards just above your eyes and if
you see bright point reflections then you may have found your hidden
camera (lens)...

This was explored in the book by Cory Doctorow "Little Brother"
https://boingboing.net/2008/05/09/ho...ct-hidden.html
John :-#)#


Nice idea. My initial guess(tm) was that the anti-reflective coating
on the camera lens would umm... not reflect anything:


It's the retroreflection from the surface of the image sensor that you
see, like a cat's eye in the dark. If the sensor is at the focus of the
lens, the reflection goes straight back to the light source.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

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Old February 4th 19, 09:27 PM posted to sci.electronics.repair
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Default Do you have experience with "infrared camera detection" on mobile devices?

On Sat, 26 Jan 2019 15:43:41 -0600, Fox's Mercantile wrote:

You're convinced I'm Snit. I'm not.


Hi Snit,

*Never have you added even a single iota of on-topic value to _any_ thread.*

You already _admitted_ you were Snit, long ago, and even if you now deny
what you long ago admitted, what matters is that you _reek_ of Snit.

You, Fox's Mercantile, just as when you post as Snit ...
o Prove that you provide _negative_ value in _every_ post.

You just proved the veracity of that fact in this very thread, for example.
o And in the next thread.
o And the next.
o And next...
(ad infinitum)

You've never even _once_ contributed an iota of on-topic value
o To _any_ thread!

I don't have to prove this, since you prove it yourself every time you post
o For example, in this very thread.

You, Snit (aka Fox's Mercantile), _can't_ add value
o The reason is that you have a left-side-of-mount-stupid DK mind

You, Fox's Mercantile, posted this _idiotic_ video, for example:
https://youtu.be/7QaABa6DFIo (Fox's Mercantile video)

Fox's Mercantile (aka Snit) can't comprehend that he can't comprehend:
o Fox's Mercantile _never_ even once _looked_ at the Y-axis!

That's how _stupid_ you prove to be, Fox's Mercantile - every time!
o Whether you post as Fox's Mercantile - or whether you post as Snit

*Never have you added even a single iota of on-topic value to _any_ thread.*
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Old February 4th 19, 10:29 PM posted to sci.electronics.repair
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Default Do you have experience with "infrared camera detection" on mobiledevices?

On 2/4/19 2:27 PM, arlen holder wrote:
That's how_stupid_ you prove to be, Fox's Mercantile - every time!
o Whether you post as Fox's Mercantile - or whether you post as Snit


There we go again.

Do you sit in front of your monitor masturbating fantasizing that your
childish rants accusing me of being snit makes me give one flying ****
about anything you say?

Go **** yourself.
Oh I forgot, you already are.


--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com


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