Tagged Questions

1
vote
1answer
95 views

Power and energy measurment for embedded system -help needed

I am trying to measure the power consumption of a low power embedded system. As the embedded system consumes current in random pulses from the battery pack, I am using an oscilloscope to analyze the ...
6
votes
2answers
333 views

How to measure power consumed by mains device

I would like to measure the power consumed by a mains device. I have heard that it's not as trivial as simply measuring the average current, as the device may be resistive, capacitive or inductive, ...
6
votes
4answers
772 views

Predicting thermal equilibrium: what's wrong with my time constant?

I understand that this is arguably a peripheral electronics problem, but it seemed to fit here better than in physics. I've been doing some power electronics design work with large IGBTs mounted on ...
0
votes
2answers
323 views

Measuring power/current

I was wondering if someone knew how to measure power/current and then interface it to a micro controller to store the data onto some external memory. I basically want to measure the power a device ...
5
votes
3answers
288 views

Is it possible to calculate effective value of a signal from its average value?

I have a signal which I want to calculate its effective value. The signal is a voltage value read on a 33.3m\$ \Omega \$ resistor connected series to a 220V AC power line. My aim is to calculate the ...
4
votes
1answer
1k views

Measuring real and apparent power

I hope my question is in accordance with the rules of the site. I'm doing a power meter using a voltage transformer, a current transformer and an arduino, besides the components to create the ...
2
votes
3answers
496 views

How do I convert AC current at 110v to Watts?

So I'm trying to measure the power consumption of my home PC. I used to have a kill-a-watt meter which I can't find, so I wired up my multimeter to measure the current. Now I'm not sure what to do ...
5
votes
4answers
477 views

is it possible to install some device which will measure in real time the torque my diesel engine is providing at the moment?

It is easy to make a meter which will show the engine RPM, many cars have one installed. But to know the power in kW that the engine is providing right now, I also need to know the torque, because: ...