JavaLaurence Geschrieben November 13, 2014 at 19:14 Share Geschrieben November 13, 2014 at 19:14 Hi, I've got the following hooked up to a Watt meter: a Tinkerforge 8A AC/DC Power Adapter, a Tinkerforge 50-LED strip, a Brick and LED Strip, and a Raspberry Pi B to run my logic. The Watt meter indicates a 69-70W consumption (I'm animating the LEDs somewhat, so their brightness varies). Even when all LEDs are dark, I'm getting 67-68W. What is consuming this? Neither the Tinkerforge nor Raspberry consume more than a few Watts... and dark LEDs ..? Does the power adapter itself consume anything? Thx for any insights. Zitieren Link zu diesem Kommentar Share on other sites More sharing options...
borg Geschrieben November 14, 2014 at 10:54 Share Geschrieben November 14, 2014 at 10:54 The 5V 8A AC/DC Power Adapter is a switched-mode power supply. I would guess that your watt meter is not able to measure switching power supplies correctly. Waveforms for switched-mode power supplies as used for much electronic equipment may be very far from sinusoidal' date=' leading to unknown and possibly large errors at any power. This may not be specified in the meter's manual.[/quote'] Zitieren Link zu diesem Kommentar Share on other sites More sharing options...
JavaLaurence Geschrieben November 14, 2014 at 17:57 Autor Share Geschrieben November 14, 2014 at 17:57 Thanks.. that would explain a lot. Zitieren Link zu diesem Kommentar Share on other sites More sharing options...
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