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Solve : Make your old phone into a Web Cam?

Answer»

So your laptop does not have camera?
Why pay $25 to $100 for a Web Cam?
Well, you you like, you can use an old android phone as a WEBCAM.
To find some recent articles, just Google:
Use phone as a web cam.

Here is one I wish to try:

Use phone as webcam
    How to use your Android phone as a webcam for STREAMING Ensure your Android phone is connected to Wi-Fi for best results. Download the #LiveDroid application from the Google Play Store. Open #LiveDroid on your phone. For best effects, tap run in BACKGROUND because it's more efficient and lets you run it with the display turned off.

https://www.windowscentral.com/how-use-your-android-phone-webcam-streaming

But it is hard for me to GET it to work.   
 Any ideas about how to make it easy?



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