Questions tagged [power-consumption]
Power consumption is the actual energy demand made on an existing power supply (e.g. battery). Consumption of electric energy is measured in joule (J), but for practicality often watt-hours (Wh) are used.
295
questions
4
votes
4
answers
370
views
How can I calculate how much power an isolation transformer itself consumes if no load is provided?
Isolation transformers usually come with these measures:
Voltamperes
Voltage
Current
In my case, I want to know estimate how much an isolation transformer will consume without a load using these ...
0
votes
3
answers
68
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
2
answers
63
views
How to calculate actual power consumption off of a battery through inverter
I'm sorry if this is not a bright question. If Watt = Volt x Ampere:
If I have a 12 V, 100 Ah battery that'd mean I can use 12 x 100 = 1200 watt an hour assuming I can use full 100 Ah and have a 100% ...
- 101
0
votes
1
answer
46
views
Measuring how much current a tablet style device draws
I wanted to measure how much current a usb-c device (specifically, a reMarkable 2 Tablet, but this could apply to any device) draws when in use, so I bought one of these:
I hooked it up and got a ...
- 511
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
70
views
Optimizing power efficiency: Troubleshooting high power consumption in analog reading circuit
I've been facing some issues with my analog readings. The problem has been somewhat resolved using the following circuit design:
You can find more information about the circuit's 'function and its ...
- 25
1
vote
1
answer
36
views
BD8306MUV and idle current
I need to generate 3.3 V from a 3.6 V battery to power a sensor. I choose the Rohm buck-boost converter BD8306MUV for that, but I discovered that it consumes nearly 5 mA of current in idle mode ...
- 13
0
votes
1
answer
163
views
How to create a power latching circuit without to exceed the GPIO specifications of an battery driven esp32 for a zero current power consumption
I want to operate an ESP32 with a 9V battery pack. In-between there is power latching circuit which is responsible for feeding a LDO voltage regulator with power for the micro controller module (ESP32)...
- 105
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
2
answers
138
views
Excessive power consumption on "AND" gate
I have an issue with an IC "and" gate (SN74AUP1G08) that has a power consumption that is way higher than what is indicated in the datasheet. Indeed, the datasheet indicates that the maximum ...
- 13
0
votes
3
answers
119
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
242
views
UART line causes exess current consumption
I'm currently working on a project that involves an STM32WB55 microcontroller, a GPS module, and a LoRa module. I have encountered an issue where, when I put all these devices into sleep mode, I ...
- 15
0
votes
0
answers
28
views
How to work out consumption of a battery after powering an electric motor?
Hi friends I'm trying to work out how many kWh of energy capacity are drained from a high voltage battery after powering an electric motor for a period of time in a little study on an electric vehicle....
- 75
2
votes
1
answer
390
views
How to use a load profile to calculate energy consumption
I usually receive electricity bills from the utility but due to issues on their end, they haven't sent me bills for the several months. Instead they gave me a load profile for a few months which has ...
- 21
0
votes
1
answer
63
views
How to calculate watt-hours used by the @channel Slack notification sound
Imagine someone used @channel in a Slack channel with 100,000 people. How many watt-hours are used to play the Slack notification on the laptops for these 100,000 ...
- 113