-live wire-
- Joined Dec 22, 2017
- 959
You need to define the requirements a bit better. The range of things listed in post #1 go from 3.6 Vdc to 240 Vac. No simple voltage or current sensor can cover that range. If you have devices groupls according to their input power requirements, that can be used to define a set of sensors for each group.
ak
If there is any sort of inductance, including a transformer supply for LEDs, then you will have a power factor less than one. So you need to see if the current is out of phase, and figure out the power factor that way. You multiply the power factor by the apparent power to get real power. So if there is a power factor of .25, and you measure 1000 watts, that's 250 volt amps, and 750 volt-ampere reactives. If it a transformer with no load, you have a power factor of almost 0. But it may consume a lot of current. Just something to be aware of. You can see voltage leads current by 90 degrees.Okay. assume one AC light bulb connected to AC main supply 230 vAC and I want to know how much power it consume for 1 hours using any microcontroller including ADC
I think I need only two sensors. current sensor to measure current throw bulb and voltage sensor to measure voltage drop across bulb
I am confused with voltage sensor if voltage drop is 9v AC (assume any device that consume 9v AC ) then how the microcontroller will know this voltage because it works only 5v DC