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Author Topic: webcam voltages  (Read 868 times)

zahc

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webcam voltages
« on: March 12, 2014, 12:23:39 AM »
I have  set of toy "night vision" goggles which are basically a webcam and some IR LEDs. The battery pack (7.5v) is shot. I want to hook up a DC power supply, but  there are three wires...black, yellow and white. Why 3? It's possible the 5AA pack has an intermediate tap; also possible one of the wires is simply extra.
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Jim147

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Re: webcam voltages
« Reply #1 on: March 12, 2014, 12:43:40 AM »
Can you cut open the battery pack and see where the wires hook up? Maybe a sperate power to the camera and the IR with aa shared ground so you could power one or both?

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never_retreat

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Re: webcam voltages
« Reply #2 on: March 12, 2014, 09:59:56 PM »
I'd dissect the pack and see how it is wired. Unless you can get a little  charge on it and go pokey with the volt meter to figure it out.
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zahc

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Re: webcam voltages
« Reply #3 on: March 12, 2014, 10:22:45 PM »
There is no taking the pack apart because it's all one molded part of the device. It would have to be dissolved in acid or something.

I guess I will assume black is ground and hook the yellow up to my power supply and just sneak the voltage up until something happens. It's broke anyway...
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RevDisk

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Re: webcam voltages
« Reply #4 on: March 12, 2014, 10:37:58 PM »
Quote from: zahc on March 12, 2014, 12:23:39 AM
I have  set of toy "night vision" goggles which are basically a webcam and some IR LEDs. The battery pack (7.5v) is shot. I want to hook up a DC power supply, but  there are three wires...black, yellow and white. Why 3? It's possible the 5AA pack has an intermediate tap; also possible one of the wires is simply extra.

Normally, yellow is data. Black and white/red are normally now.

It varies, though.
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Azrael256

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Re: webcam voltages
« Reply #5 on: March 12, 2014, 10:39:44 PM »
Check the resistance between the black and yellow.  Then warm it up and check again.
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