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Voltage, otherwise known as electrical potential difference (denoted ∆V and measured in volts) is the difference in electric potential between two points (adapted from Wikipedia). Voltage can be constant (DC) or varying (AC).

1
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2answers
need to figure out which leads connect to ground, neutral and live. 2) I also need to figure out what kind of transformer I need to use. All I know is that it needs to convert the voltage from 110V … (in the US) to 230V (so that the European motor can use the power). I read about how to do it when there is live voltage, in a situation where you need to figure out which wire are which in a house …
asked Dec 29 '14 by stackOverFlew
5
votes
5answers
i have this led, and im not sure what resistor to use to drop the 5v current to an appropriate voltage and produce the appropriate current. the LED is rated at 200mA, but the data sheet says i …
asked Nov 8 '12 by stackOverFlew