All Questions
Tagged with power-consumption low-power
17
questions
0
votes
1
answer
70
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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 ...
- 25
0
votes
2
answers
140
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
0
answers
594
views
ATMega32u4 power consumption with CLKDIV8
I have a little board with an ATMega32u4, that's run straight off USB voltage. There are no peripherals on board that should draw power (no LDOs or anything, LED is off).
It has a 16MHz crystal.
The ...
- 879
8
votes
3
answers
2k
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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 ...
- 247
4
votes
1
answer
1k
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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.
...
- 5,508
2
votes
1
answer
936
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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 ...
- 51
0
votes
0
answers
372
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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://...
- 377
0
votes
2
answers
233
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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 ...
- 74
1
vote
2
answers
893
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 ...
- 21
1
vote
1
answer
224
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 ...
- 79
0
votes
0
answers
50
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Restarting ESP8266 NodeMCU in DeepSleep with a signal from HM10 BLE
I'm building a simple project in which I put the ESP8266 NodeMCU board in DeepSleep mode, so I can save some battery since it's powered with 4 AA batteries.
What's the problem?
I don't want my ESP to ...
1
vote
1
answer
592
views
Power Consumpion on i2c on esp32 on arduino framework
I am relatively inexperienced with electronics so be gentle please.
I am trying to interface a VEML7700 photodiode sensor with a Firebeetle ESP32 using platform.io and arduino framework.
The ...
1
vote
1
answer
3k
views
nRF52 GPIO configuration in sleep mode to prevent peripherals from drawing current
I have a battery-powered board with an nRF52832 and some peripherals that I am writing a new firmware for. When set to sleep (NRF_POWER->SYSTEMOFF=1;) the board still draws way too much current (...
- 279
2
votes
1
answer
335
views
Why different SOCs have different CPU power voltages for given frequency?
Recently, I studied dvfs tables for 3 SOCs: exynos8890(LITTLE cluster), exynos7880, snapdragon 625.
Here is the result:
octave source code
The point is, that different SOCs with pretty same ...
1
vote
0
answers
145
views
Measure low AC Power consumption (oscilloscope? MCU?)
I would like to measure AC power consumption of devices such as AC/DC charger, AC LED bulb or an electric circuit in the main box of a house.
However, their power consumption are quite low and the ...
- 11