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.
300 questions
1 vote
1 answer
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Drop of voltage VCC on Arduino UNO
Summary: I am using an Arduino UNO. I am using a potentiometer connected from 5V Arduino supply to ground to provide a variable voltage on the pot wiper, which I input to an analog input on the UNO ...
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1 vote
2 answers
135 views
Energy consumption of a DC motor with or without reducer for a given workload
context I'm electrifying a DH scooter for the the "uphill" part of the downhill fun. I obviously need a lot of torque in this regard. So I will likely use a reducer and/or chain drive ratio ...
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0 votes
5 answers
148 views
Can music be detected from the power consumption of speakers and amplifiers?
When a speaker and amplifier are connected to mains power, their power consumption varies with the music being played. For instance, power usage might increase during loud sections or parts of a song ...
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1 vote
2 answers
176 views
Circuit to disconnect I2C pull-up to avoid leakage
We are trying to achieve an ultra low power circuit with an ESP32 and for this aren't using deep sleep but disconnecting the ESP32 power line with a load switch, this makes us saves quite a lot of uA. ...
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0 votes
1 answer
215 views
How to Calculate Total Power in an Unbalanced Star-Delta System?
Q: I have a 230 V/50 Hz three-phase system with both star and delta loads connected to the same supply. The system is unbalanced, and I can only measure the line currents (I1, I2 & I3) and line-...
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-2 votes
1 answer
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Can the efficacy of an air conditioner be affected by a surge protector? [closed]
For years, I have had my 8000 BTU window air conditioner plugged into this CE TECH 8-outlet surge protector. It was the only item plugged into it. Recently, I switch it to this TROND 13-outlet surge ...
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4 votes
4 answers
742 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
122 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
253 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% ...
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0 votes
1 answer
113 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 ...
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0 votes
1 answer
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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 ...
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0 votes
1 answer
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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 ...
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1 vote
1 answer
71 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 ...
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0 votes
1 answer
375 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)...
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0 votes
1 answer
150 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 ...
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