Questions tagged [power]
This tag is for questions regarding powering and/or power consumption of Arduino systems.
890
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Powering a NodeMCU as well as a GSM module
I'm trying to connect a GSM module(sim800L) with a NodeMCU to execute remote operations. But the GSM module cannot be powered using the NodeMCU. So, what are the other ways to power the board as well ...
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2
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Nodemcu powering with 5.2v and 2A?
I bought a this voltage regulator . DC-DC 5v 8A voltage regulator. ıts supported 8-35V input voltage . And i want to use this with 12v power supply.
But i searched on the internet . Nodemcu max amp is ...
1
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0
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39
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ESP8266-01S only coming back from DeepSleep every 2nd time
I'm using an ESP8266-01S for a battery-powered project. The ESP is in DeepSleep, a doorbell relay pulls RST to GND, bringing the ESP to life to do some stuff, before going back to DeepSleep.
My ...
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1
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1
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Program work when used Delay() but same program doesn't work with millis()
I'm running a dc motor using esp32 and mosfet by taking readings of IR.
Program works fine when used delay() but same program doesn't work when uploaded using millis().
//This uses fixed delay()
// ...
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Need help to simulate this circuit [migrated]
I want to make DC To DC flyback converter
input volt 40 to 60v
output 5v 2A approx ,
and I want to simulate this circuit,
how I can do.
- 1
1
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0
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24
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Running a 5V, 4pin pwm fan with Mega2560
I have a Mega2560 and would like to use it to power a single fan and display. The fan is a 5V fan that draws 260mA and I can't find power specs for this display. I can't find a clear answer for how ...
- 111
1
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0
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27
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Arduino Nano 33 BLE power consumption optimization
I am working on building a sensor using Arduino Nano 33 BLE that will measure temperature using two thermistors and angle changes. The measured values will be transmitted over Bluetooth to a ...
- 1,309
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0
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26
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channels on logic level shifter outputs high
so I have a logic level shifter which is TXS0108E ,I use it to shift the eps32 ouput volatge to 5v to be used with motor driver ,when I test it with multimeter , all the channels on the B side outputs ...
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-1
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1
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35
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How to produce multiple DC voltages for a single project with different dc requirements
I have a project that has 2 12V .2 amp fans, and 1 30 3 amp LED COB panel, and a 5 V Arduino. I was wondering if there was a simple method to power all of these devices from a 120 V wall outlet?
As of ...
- 1,020
3
votes
2
answers
626
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Bluetooth Communication Not Working with DC Power But Works With USB Power?
I am running a HM-10 Bluetooth Low Energy (BLE) module to transmit serial data (using SoftwareSerial) from an analog sensor onboard my Arduino Uno to a serial terminal app on my Android phone. When I ...
CommunityBot
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0
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257
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Switch controlled power saving esp8266
I'm trying to build a door sensor with the esp8266. I want it to be battery powered and use deepSleep for power saving. I'm going to use a normally closed reed switch between D0 (GPIO16) and RST.
I ...
CommunityBot
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-1
votes
1
answer
358
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How to power LILYGO ESP32-S3 1.9" T-Display without USB?
Noob question, I'm sure, but - I have one of these little LILYGO ESP32-S3 1.9" T-Display boards. Linked up with my PC, downloaded my code, runs fine, but I can't get the thing to power up from ...
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4
votes
1
answer
496
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Power Supply Problem with Arduino Yún: Using a long USB cable
I want to use an Arduino Yún as a kind of outdoor weather station. I want to supply the power for the Yún with a 5V USB-Charger. Using a normal USB cable everything works fine. But as the weather ...
- 1,256
0
votes
1
answer
47
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Arduino UNO pin 3V3 OUTPUT have 5V
I just noticed that my original Arduino UNO on pin 3V3 have 4.98V output. That's odds. That pins should have 3.3V. So I measured the Vout on the voltage regulator LP2985-33DBVR where that pins is ...
- 1,107
3
votes
1
answer
96
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Arduino | external power supply and USB at the same time
Arduino | external power supply and USB at the same time
I have got an Arduino Mega 2560 project with many sensor and outputs.
Right now I’m supplying it with an external stabilized 5V over the 5V pin ...
- 1,309
1
vote
1
answer
70
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AA alkaline batteries on firebeetle?
I would like to power a dfrobot firebeetle 2 using 3 alkaline batteries. I tried connecting the battery pack to the GND and VCC, but the board does not seem to react. What pins should i connect the ...
- 1,510
0
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0
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22
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Power saving and pc interrupts on ATMega324PA
I have an ATMega324PA and I want to power down and only wake on CAN receive (working on int 0 successfully), on a schedule, on pcints on 6 digital inputs, and on serial receive - either serial0 or ...
- 11
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1
answer
88
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Servos jitter when powered by power module
I need 48 sg90 servos to move to a specific position each minute. Now I am using two arduino mega boards to power everything through 6 bread boards but it seems I need more power because some servos ...
CommunityBot
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4
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Two arduinos one power source
I was surprised that this question had no answer on Stack Exchange and I can't find much about it elsewhere so, in the hopes that it will be useful to people other than myself, I'd like to ask:
How ...
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1
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1
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ESP32 failing to read from DHT11, MH-Z19C sensors
I got MH-Z19C (CO2 ppm) (datasheet), and DHT11 (temperature) sensors from Ebay and followed instructions online to set it up with my ESP32 board (ESP32).
I'm using a breadboard and 5V/3.3V power ...
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2
answers
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NodeMCU ESP8266 Ver 0.1 not powering on with VIN
I'm trying to power on my NodeMCU ESP8266 Ver 0.1 (thats what is written in board), via VIN and Ground with my phone charger.
I'm 100% sure that the USB charger is working, providing 5V, and that the ...
2
votes
1
answer
83
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Wemos C3 Mini (ESP32-C3) does not run firmware unless connected to pc
I've been using ESP32s and ESP8266 for a few years now and I thought I'd give these little boards a shot, they were cheaper for Bluetooth/WiFi combo, and I don't need all the bells and whistles of a ...
- 1,309
6
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3
answers
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How to deep sleep ATtiny/ATmega (to run for years with batteries) but still detect a button press?
Question (TL;DR): what is the optimal method to deep sleep (to run an ATtiny45 or ATmega on batteries for 1+ year) but still be able to detect a button press? Is it possible to deep sleep until a ...
- 1,336
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votes
1
answer
85
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Why can't my four batteries (6V) can't power this circuit while usb 5v from arduino can?
I have this circuit
And I want it to power all the led rgb (100 in total), I want to make a independent portable circuit, so I don't have to use the usb power. The thing is when I use this circuit it ...
- 1,309
2
votes
1
answer
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Ultrasonic sensor returns random values on external power supply
my Problem is, that I get random values from my ultra sonic sensor if my arduino is connected to any external power supply (vin port 30) on my arduino nano.
If I power up from the laptop usb port, I ...
2
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3
answers
147
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Powering Arduino and transistors with one power supply > 12V
So say you want to use transistors with your Arduino Nano to power components, which require greater than 12V. If your power supply is more than 12V, is there a way to safely use the same power supply ...
- 1,611
0
votes
1
answer
603
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How to work with WS2812B 16x16 matrix panel from aliexpress
I'm completely new to Arduino, and I want to build the project using an LED 16x16 matrix, but I don't know where to start. On the internet, I keep finding these custom matrix panels and they aren't ...
4
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2
answers
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What happens if we connect GND and +5v?
What will happen if I by mistakenly connect GND and +5v of an Arduino Nano? Is there any protection for it? Or will it get short and fry out something?
2
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2
answers
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Connect 5V relay to ESP32 WROVER B board
I need to use a ESP32 WROVER B based MCU board with a standard (cheap) one-channel 5 V relay (e.g. to switch on a mains-power appliance).
Attempted removal of excess solder around the headers ...
CommunityBot
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1
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0
answers
75
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How to lower the power consumption of this ESP32 during delay(500)?
The following code works. It does the following:
wake up when pin GPIO0 is connected to GND (the pulse duration is 400 milliseconds)
once every 10 wakings, I send the current index to a server with ...
- 1,309
3
votes
2
answers
564
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Set control register to low in ds3231 rtc
I have been using ds3231 rtc module for keep tracking and make alarm along with backup battery. when I used it for first time it worked fine. but now it doesn't keep track my time when the power lose ...
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2
votes
1
answer
432
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Wemos D1 mini and JSN-SR04T-2.0: Type of power supply affects the sensor readings
Pretty similar to what is described here I have the strange problem that my sensor readings are affected by the type of power supply I use.
Whenever I connect my D1 mini through USB with laptop ...
CommunityBot
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1
answer
342
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If Arduino digital pins can be used as power supply pins then why do we need VCC pins? [closed]
If Arduino digital pins can be used as power supply pins then why do we need VCC pins?
VCC pins work the same as digital outputs , don't they? So why do we still need VCC pins to
power components
1
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2
answers
572
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How to fix HC05 burning even after while using voltage regulator?
I'm using two circuits for my wireless head mouse project, one of them is a transmitter circuit with Arduino Pro Micro, HC05 Bluetooth module, Elechouse Voice Recognition Module V3.1, GY-521 module ...
CommunityBot
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-1
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1
answer
42
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Arduino Nano Doesn't Upload Any Code After Connecting It In Reverse (Rotated 180°)!
I've Made A PCB Which Includes An Arduino Nano. I Soldered Some Female Pin Headers Instead Of Soldering The Arduino Itself, So That I Can Easily Plug/Unplug The Arduino Board.
It Was All Good, Until I ...
- 1,409
0
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0
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94
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Atmega32u4: Reduce power consumption while keeping USB active
I have a USB powered board, that should consume as little power when idle as possible, while keeping the USB connection alive.
The device only sends data to the host, doesn't receive any, so the ...
- 219
-1
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1
answer
20
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Driving APA102C strips from Mega 2560
I have written (cobbled together from code snippets) an Arduino program that pushes various patterns down 160 APA102C LED strips (5). I originally was using a 5V 40A power supply and everything worked ...
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0
votes
1
answer
480
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Why can't I use Jeelib Sleepy on the Teensy 2 along with Serial
I have been using the Jeelib Sleepy functionality for several years now to achieve low power states on the Arduino ATmega328/1280/2560 boards, specifically the LoseSomeTime functionality.
I want to ...
CommunityBot
- 1
0
votes
2
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96
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Lag in sensor reading when Arduino Powered with 12V adaptor
So I am trying to power an arduino to measure water flow. It works all fine and dandy when I am powering it with laptop, but when I directly power it with 12V 1.5A adaptor the readings take a second ...
0
votes
3
answers
82
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Voltage drop when power from AA batteries
I am using a Arduino MKR 1010 Wifi board to control 4 servo (PS-1109MG). All the circuit is powered by 4 AA rechargeable batteries (1.2V * 4). Arduino is powered through the Vin port.
Below is a ...
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2
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2
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Where Can I Find a 12v Solder-less Breadboard Power Supply?
I am trying to find a 12 V input and 12 V output breadboard power supply but I can't find one. I am making an Arduino-controlled lock but the Arduino cannot power the lock strike by itself so I need ...
- 1,309
0
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1
answer
119
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DHT11 stops working when power comes from a power supply board
I had a mini project with a DHT11, a temperature and humidity sensor, working perfectly on my Arduino UNO clone. Then, I bought a power supply board, that can feed the sensor with the 5V it requires, ...
- 103
2
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2
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247
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Arduino Uno SD card storage
I am interested in storing accelerometer data to an SD card. Since power consumption is the main consideration of my project, it is important to do as few writes to the SD as possible, because the SD ...
CommunityBot
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2
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1
answer
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Can I use and external power supply and USB at the same time on my Arduino?
Can I use the Arduino with an External wall-wart and the USB at the same time? I need to power more LEDs, and the USB on my computer can only supply so much. But, I didn't want to destroy my ...
3
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2
answers
1k
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Sleep mode and watchdog at the same time
Suppose we want to save battery power, and we use sleep mode and also prevent the Arduino from hanging and use the watchdog timer.
The problem is here that when the Arduino goes to sleep the watchdog ...
- 1,672
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1
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56
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How to wire an ESP32-S2 Dev KitM-1 for power?
I'm putting an Espressif ESP32-S2 Dev KitM-1 into a project box. The box will have 12VDC power and a 5V buck converter for the Dev Kit.
Do I need to use the USB port to power the Dev Kit or can I ...
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1
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661
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Wemos mini pro switch power from servo with mosfet bs170
I got a servo connected to a wemos/arduino with a capacitor(470uf). Before I didn`t use a cap.
Now with the cap the device use to much power while sleeping(capacitor on the servo). I want to switch ...
CommunityBot
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1
vote
2
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149
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Arduino Nano: HUGE voltage drop on VIN
I am building a small automated indoor greenhouse. I want to use an Arduino Nano to control some LEDs und a fan (both through relays) and a water Grove Water Atomization module. Everything works fine, ...
- 1,611
1
vote
3
answers
737
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Powering the Arduino with a battery and reading the battery voltage
I am trying to display the battery level as it is being used to power the arduino.
I have tried powering the Arduino through the USB and the battery voltage is read accurately when compared to the ...
- 1,672
5
votes
4
answers
5k
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Arduino PRO Mini - The pads [was "jumpers"] on the back and Low Power Consumption
I've noticed that on the back of an Arduino PRO mini are two Jumpers next to the A4 and A5 pins, marked with red in the following :
Looking at the leads one seems to be a bypass for the POWER Led and ...
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