All Questions
Tagged with power-consumption power
45
questions
0
votes
3
answers
70
views
How I can calculate/estimate how many voltamperes I need for an isolation transformer?
I need to power an ungrounded device with live chassis. According to my Google fu I can protect myself using an isolation transformer: https://www.youtube.com/watch?v=3rvEdHyAd2k.
Of course I am not ...
0
votes
1
answer
59
views
If a MOSFET is maintaining a singular state what will the power consumption be?
https://docs.rs-online.com/ec6b/0900766b811b5c5c.pdf
Taking the MOSFET driver from the attached data sheet (1.5A 30V), if the MOSFET wishes to remain on for a period of 24 hours does it require the ...
- 49
0
votes
1
answer
95
views
What's the meaning of RF power consumption given in mA, not in mAh?
I'm trying to understand the power consumption of an esp32 with BLE enabled and transmitting. Its datasheet provides the following table:
As you can see, it provides the power consumtions in mA. I ...
user222967
0
votes
3
answers
121
views
How can I maximize the power consumed in this resistor?
simulate this circuit – Schematic created using CircuitLab
I have gotten really stuck on this question. The question is:
Determine R3 so that maximum power is consumed in R3.
What is that ...
1
vote
2
answers
74
views
How to limit power consumption to a certain value?
For the SAE Aerodesign competition, there is a requirement to create an electric RC airplane that does not exceed 750 W of power consumption at any time.
The electrical circuit consists of a 22.2 V (...
- 11
0
votes
3
answers
2k
views
Can increasing the wire gauge reduce your electric bill?
I was in a seminar and heard the presenter say something I am not able to understand. The statement was that if you use a higher gauge wire it would help reduce your electricity bill. Since I was not ...
- 917
0
votes
2
answers
56
views
Camera + Accessories and power
I work with movie cameras. Unlike normal cameras, they have many types of batteries, sizes, etc that can power them. Many attachments (wireless video transmitters, follow focus systems, monitors, etc) ...
1
vote
1
answer
55
views
Calculating battery life considering the capacity drops depending on load current (2 x 4 AA-packs in parallel)
This is a very recurrent question, about calculating the battery life given certain circuit current usage.
This example will be similiar to this one in terms of the battery used and the consideration ...
0
votes
1
answer
111
views
Unexpected huge MOSFETs power consumption
I have 2 MOSFETs :
NMOS -->
Ref :BSZ520
Rds_on : 52 mohms
PMOS -->
Ref :IRF9640
Rds_on : 500 mohms
My ...
- 41
0
votes
2
answers
112
views
Lighting System in terms of its efficiency and consumption
I'm curious regarding some matters in my experiment session of Efficient Lighting System. There are 4 types of lamps which we measure the data to fill-in the table as in the picture. Correct me if my ...
- 11
2
votes
1
answer
726
views
Power efficiency with Boost vs Buck-Boost using same regulator
I'm doing a few tests and figuring out what will be the best option for what will eventually be part of a battery powered circuit. I have both a boost and buck-boost converter, both using the XLSEMI ...
- 59
1
vote
2
answers
257
views
3.7V to 7.5V step up circuit
I need a circuit which can step up the voltage from my 3.7V Li Ion battery to 7.5V.
The current requirements are pretty small (up to 50mA max), but I have a latching solenoid which requires a short 7....
- 37
0
votes
1
answer
209
views
MC34063A power consumption calculation
I'm designing a circuit based on the MC34063A switching regulator to step up 3.7V to 8V.
The 3.7V for Vin comes from a 3.7V Li Ion battery and so I'm trying to calculate the battery life. I'm a bit ...
- 37
0
votes
0
answers
43
views
Do electricity distribution companies charge apparent power (VA) or effective power (W) [duplicate]
If there is a load connected to a power outlet during one hour, where average apparent power is 1000VA and average effective power is 800W, what will be charged by the eletricity distribution company? ...
- 657
0
votes
2
answers
64
views
Microwave "power" vs "power consumption" [closed]
I'm looking at the specs for this microwave and it lists Power -> Microwave as 1,100 W, but then lower down it lists ...
- 117