2 votes

USB voltmeter, the other way around

A key feature you need for this that many of the cheapest solutions don't offer is full isolation between the mains input and the USB port. I did a search on the term "USB multimeter with ...
PeterJ's user avatar
  • 121
2 votes

What can measure the spectrum frequencies of a monitor?

For monitors, you don't need to do this at all. It's in the monitor spec. Have you ever seen a monitor boast it has a 120hz Refresh Rate? In perhaps the simplest equivalency in computing, 1 ...
CDove's user avatar
  • 894
1 vote

USB Power Meter to measure Smartphone Energy Consumption

You cannot measure the phones power consumption this way. The USB dongle will only see the current being used to charge the battery of the phone not the power the phone is drawing from the battery. ...
Sneaky Puffin's user avatar
1 vote

How to measure Earth’s magnetic field?

The device you cited is spendy; if your budget does not permit acquiring it, there are alternatives. You could get an iPhone and the xSensor app cited in this Wired article, or an Android phone with ...
K7AAY's user avatar
  • 1,695

Only top scored, non community-wiki answers of a minimum length are eligible