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| The Projects Forum Working on an electronics project and would like some suggestions, help or critiques? If you would like to comment or assist others with their projects, this is the place to do it. |
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Thread Tools | Display Modes |
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#1
03-10-2010, 03:12 PM
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Power Supply for RF Modulator
Hi I need a power supply for my project. I intend to take the plug off the the phone charger but I have no multimeter to know which line is positive. One of the two wires have a white stripe running on top of it. Would that be the positive?
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#2
03-10-2010, 05:13 PM
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Quote:
Last edited by ziouranio; 03-10-2010 at 05:14 PM. Reason: mistype
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#3
03-10-2010, 05:38 PM
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Here is a simple and cheap low voltage polarity checker you can build:
The probes can be just plain wire. Both LEDs need to be in the circuit, as they protect each other from excessive reverse voltage.
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General info: If you have a question, please start a thread/topic. I do not provide gratis assistance via PM nor E-mail, as that would violate the intent of this Board, which is sharing knowledge ... and deprives you of other knowledgeable input.
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