Skip to main content

All Questions

1 vote
1 answer
1k views

Correct way to measure power consumption in AC

I'm trying to design a power consumption data logger. But I don't understand the calculations behind this. I got more confused researching on the internet. First, there are three types of power: ...
DrakoPD's user avatar
  • 71
0 votes
1 answer
1k views

power consumption of sensors

How to measure the power consumed by a temperature sensor theoretically? The datasheets mention the supply voltage range and output current. So, to calculate the power supply current will be used in ...
Megh's user avatar
  • 11
0 votes
1 answer
52 views

Power impact in a wireless sensor network architecture

this is not a real question but a way to talk about the following topic. I was thinking on a monitoring system based on a Sensor part, a Computing part and a Radio Transmission part. My question is ...
Nicola's user avatar
  • 143
1 vote
1 answer
269 views

Unexpected reversed voltage over shunt resistor

I'm trying to measure the current consumption of an accelerometer using a 1kOhm shunt at Vdd. I've read that there's a ~30kOhm resistor at SA0, so grounding it causes a much higher current draw. When ...
Kar's user avatar
  • 1,557
5 votes
2 answers
790 views

5 year run time on small battery

I am working on a project that checks a sensor every 12 hours and reports the status via cellular modem to our server .. Power consumption is less than 1mA during sleep mode and spikes to 900mA ...
user83711's user avatar