View Single Post
  #9  
Old January 27th 19, 04:17 AM posted to rec.photo.digital,sci.electronics.repair
arlen holder
external usenet poster
 
Posts: 42
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.