Questions tagged [power-consumption]

Power consumption is the actual energy demand made on existing power supply (e.g. battery). Consumption of electric energy is measured in watt-hours, Wh.

Filter by
Sorted by
Tagged with
1 vote
1 answer
73 views

How do I compute the power consumption of an audio amplifier?

I intend to use this audio amplifier in my project : PAM8019 It has two analog inputs : left channel and right channel. It has two analog ouputs, which are the amplified inputs. Let's say I follow the ...
user avatar
0 votes
0 answers
51 views

Gasoline generator + Peltier configuration

I have a DIY cooler box with Peltier element 12V/3A/27 watts and want to connect via power supply to gasoline generator with output 600W at 5A max. Would that be a problem and not supply my Peltier ...
user avatar
0 votes
1 answer
57 views

Does an amplifier consume any power when nothing is connected? (GPD2846A built-in 2W amplifier) [closed]

The GPD2846A module has a built-in amplifier into it. However, I want to use it with my headphones which don't require 1-2W (they are definitely going to distort sound and possibly be damaged). So I ...
user avatar
1 vote
0 answers
28 views

VL53L3CX XSHUT PIN PROBLEM IN DEEP SLEEP

I have project using a VL53L3CX distance sensor. Also , I control it by ESP32. In normally, I can command to XSHUT pin. And I can read xshut pin of ESP32 that is 3V3 or 0V. But, When ESP32 enters deep-...
user avatar
  • 11
0 votes
2 answers
63 views

How is power consumed by an induction motor calculated based on speed (from a VFD) and torque induced by the rotor shaft?

I've been tasked with carrying out some design improvements on my company's production floor. There is a flat belt conveyor assembly line, whose movement forward movement is controlled by a single ...
user avatar
  • 3
7 votes
3 answers
2k views

For a mathematical operation in CPU, could power consumption depend on the operands?

Obviously, the number of operations affect a CPU's power consumption, but does it solely depend on the operations themselves? For example, adding 0 and 1 involves setting one single bit, but adding ...
user avatar
  • 207
2 votes
2 answers
146 views

How does this LED last this long?

Before the end of last year, dad asked me for some small red light for his cabin, to pretend there is an alarm activated. He wanted it battery powered, so it can glow when electricity is turned off. I ...
user avatar
  • 31
4 votes
1 answer
79 views

STM32F030 High current in stop mode

I would like to put STM32F030K6T6 into STOP mode (low power mode), in which there should be current consumption around 5 μA. But whatever I do the current consumption is around 450 μA in stop mode. ...
user avatar
  • 5,187
2 votes
2 answers
1k views

Do higher voltages cause heating?

I'm trying to wrap my head around energy consumption in general. For some background info, I'm an engineering student and am familiar with the usual electrical engineering formulae Here is what caused ...
user avatar
  • 31
0 votes
3 answers
181 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 ...
user avatar
  • 557
0 votes
2 answers
50 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) ...
user avatar
-1 votes
3 answers
94 views

What is the power consumption of an amplifier while powering a pair of speakers?

I need help getting power consumption to pick the right battery for a portable sound contraption. I have an amplifier with the following specifications: Class D 100 W MAX Power Output X 2 (4 ohms, 20 ...
user avatar
1 vote
1 answer
169 views

SIM7020 current consumption way too high

For a project I'm using the SIM7020 Narrowband-IoT (NB-IoT) module to send data to the cloud. The SIM7020 is controlled by an Arduino Pro Micro (ATmega32U4). Because the sensor is running on a ...
user avatar
1 vote
1 answer
31 views

Should I include Ivdd for total current consumption calculation?

I'm looking at the STM8L101K3T6 microcontroller for a timer and would like to calculate the average current consumption. It will stay active for only 5% of the time while it sleeps for the other 95% ...
user avatar
0 votes
1 answer
54 views

How many devices consuming 6.5W peak can I connect to a 100VA transformer?

Our customer wants to know the number of devices that they can connect to a transformer rated at 100VA. Our devices consume 6.5W peak when the batteries are charging. Here is my calculation and please ...
user avatar
  • 101
1 vote
1 answer
36 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 ...
user avatar
0 votes
1 answer
56 views

How does area of transistor affect power consumption

I knwo when you increase the area of a transistor of a circuit, the power consumption will be increased. I just want to know why is that case? Here is my circuit in spice
user avatar
  • 3
-1 votes
1 answer
65 views

What is energy consumption of a circuit

I am currently working on my coursework, and one of the questions is about measuring the energy consumed by my circuit during the 5 μs period of the simulation as the power supply voltage, VDD, is ...
user avatar
  • 3
1 vote
1 answer
66 views

Measure mWh - mAh of an MCU-centered circuit [closed]

I build battery-powered circuits with MCUs that consume a few uA in sleep "stage." For total power consumption measurement (and therefore battery-lifetime), I used to use this but recently ...
user avatar
  • 46
1 vote
0 answers
101 views

Can someone explain the unusually high minimum supply current of ESP32-WROOM-32E?

I had chosen the FireBeetle 2 ESP32-E board for a future project. I started looking at the power consumption details and I came across this posting. It's about some mysterious startup current draw ...
user avatar
0 votes
1 answer
136 views

How to calculate the power consumption of an ultrasonic distance sensor?

I’m working on a project that will be using an ultrasonic distance sensor continuously throughout the day. I want to figure out what the theoretical power consumption would be over a number of hours ...
user avatar
-1 votes
1 answer
98 views

Do MOSFETs overheat in the off state? [closed]

I'm dealing with a 30N60 power MOSFET connected to a 15 A 12 V battery (acting as a switch.) Do such MOSFETs overheat or consume a lot of energy in the off state? (When the gate is off.)
user avatar
  • 13
-2 votes
3 answers
161 views

How much power will a 4kW BLDC motor use if ran for 3 hours?

My college is participating in a competition to build a solar car with batteries. After doing calculations, we have decided on using a 72V, 4000W BLDC motor. Now, we need to run the vehicle for 250km ...
user avatar
1 vote
3 answers
228 views

ESP8266/ESP-12F gets damaged when powered by LDO (LD1117v33) every time

Every time I connect a new ESP8266 (ESP-12F) to a new LD1117v33, as long as I insert an ammeter in between, it runs fine. It consumes about 70mA during normal running, and almost 0mA when in deep ...
user avatar
-1 votes
1 answer
40 views

Energy consumption Calculation

I work for a food processing plant and working on a project that calculates energy consumption. Am having a hard time converting information given by the manufacture to calculate the average kWh. ...
user avatar
0 votes
1 answer
53 views

How to find the capacitance at a point?

I wanted to find the capacitance at X,Y,P and Q in the diagram given below. Idea was to find the dynamic power consumption of the circuit and for that we need the capacitance(I got this idea from a ...
user avatar
0 votes
1 answer
90 views

CMOS AND Circuit calculate power consumption

I need to calculate the power consumption of the CMOS AND circuit and I tried to figure it out myself but I really don't have a clue. I don't need the full answer but a first step into the right ...
user avatar
  • 13
1 vote
1 answer
55 views

Power consumption of an inverter

I want to calculate the consumption of a PV inverter connected to a 50 kW PV plant. In the datasheet of the inverter it is written that the consumption of the inverter is: < 0.24% of Pac,r. I ...
user avatar
0 votes
1 answer
101 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 ...
user avatar
  • 31
0 votes
2 answers
67 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 ...
user avatar
  • 11
3 votes
2 answers
194 views

How do ASIC designers approach designing for extremely low supply voltages like 0.3V?

In ASIC design, there is a tradeoff between performance and energy efficiency. Since most consumer CPU's are designed for maximum performance, they operate at high voltages and clock frequencies, ...
user avatar
  • 147
0 votes
0 answers
161 views

ATMEGA1284p and RFM95 sleep current around 35µA: can it be reduced further?

In my project, I am using an ATMEGA1284p processor in the TQFP-44_10.0x10.0x0.8P package as well as a RFM95 LoRa module. For the low-power mode, I'm using the rocket scream low-power library: https://...
user avatar
-4 votes
3 answers
163 views

Why don't GPS satellites experience power outage more often than they should?

With the advent of smartphones I would believe that there's this huge exponential growth in number of GPS receivers around, and by now there should be an unaccountable number of devices on earth ...
user avatar
  • 1,188
0 votes
1 answer
110 views

Could a PC consume more power from the plug if it oparates in a colder enviroment?

I have a mining rig (computer using its processing power to calculate hashes in order to eventually be rewarded with cryptocurrency tokens.) The program I use to mine tells me each time the power ...
user avatar
  • 101
0 votes
2 answers
97 views

How to reduce power in barebone setup of atmega328p?

For every 15 minutes once ultrasonic sensor data will be send to the receiver using nRF24L01. I'm using atmega328P with battery power using AAA*3 battery and it should operate at least 15 days. Can ...
user avatar
0 votes
1 answer
205 views

Leakage current through push-button and switch

I am developing a battery-powered application on a custom PCB, thus power consumption is critical. I am trying to minimize current consumption with stm32L4 MCU, by turning floating pins to analog, ...
user avatar
  • 46
2 votes
1 answer
213 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 ...
user avatar
  • 59
1 vote
2 answers
97 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....
user avatar
  • 27
0 votes
1 answer
76 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 ...
user avatar
  • 27
0 votes
0 answers
41 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? ...
user avatar
3 votes
3 answers
374 views

What happens with the power grid if nobody uses electricity?

How much electricity does consume electric system by itself? Just to have an option at any moment to plug in anything at socket at home and turn it on. There are huge power plants to convert high ...
user avatar
  • 187
1 vote
2 answers
296 views

Correct way to measure circuit power consumption before or after LDO

I have created a low power MCU project, and I want to measure the power consumption. I am confused with: a) the correct way to place the ammeter, before (picture A) or after (picture B) my voltage ...
user avatar
  • 21
0 votes
2 answers
46 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 ...
user avatar
  • 117
0 votes
0 answers
62 views

High Power BJT Current mirror

I am trying to find an example of BJT current mirror with high power consumption. Any advice concerning the setup , or an example design will be appreciated.
user avatar
1 vote
1 answer
107 views

STM32L0 series current consumption oscillation

I'm working on a low power project that my micro-controller can only have 1 mA in 2.7 V. My micro-controller is STM32L051C8 and its works nice with its peripherals (ADC and Timer) and its current ...
user avatar
1 vote
1 answer
114 views

CP2102 using excess current

I am powering an off-grid ESP32 project from a 12v battery (12v because that's what the connected pump and solenoids use). The ESP32 is directly on PCB; I'm no longer using Dev Kits. I'm needing a ...
user avatar
  • 133
1 vote
0 answers
48 views

How to measure power consumption of Arduino Uno onboard ADC module?

For a project, I am using Arduino Uno onboard SAR ADC module. I want to calculate the power consumption by the ADC module. The way I am thinking to calculate it is AVCC*ICC. Here, AVCC is the supply ...
user avatar
  • 111
2 votes
2 answers
347 views

PWM output vs Digital output

Could I use a PWM output as a digital output? For example to act like an on-off signal by varying the duty cycle between 0 and 100%. Does it involve any difference in power consumption?
user avatar
0 votes
1 answer
613 views

433 MHz receiver consumes too much power

I bought one of this modules (link), with the SYN470 chip on it. In the datasheet it's mentioned that in continuous mode with 433 MHz the current consumption is 3.9 mA which is a lot in my case. But ...
user avatar
  • 1,974
0 votes
1 answer
313 views

What is the best way to measure and record the power consumption of a servo motor accurately?

I can obtain the rotational angle and velocity of a servo motor. However, I cannot obtain the current nor torque while the motor is turning. What is the best way to measure the power consumption of a ...
user avatar

1
2 3 4 5 6