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How to calculate stack power consumption?


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My stack is powered by a Step-Down Bricklet, and brickv indicates that Stack Voltage is 9.5V and Stack Current is 160mA. School physics taught me that Watts = Volts x Amperes. Although a figure of 9.5V is given for "Stack Voltage", I'm assuming that actually the stack is run on 5V, not 9.5V. So does this mean that my stack only consumes 0.8 Watt? Seems like peanuts.. or is my math & physics way off ?


Maybe it would be cool to let Brickv display stack power consumption too...

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