Questions tagged [power]
This tag is for questions regarding powering and/or power consumption of Arduino systems.
908 questions
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CAN SAEJ 1939 prototype setup [closed]
Could this setup work ?
I plan to use 12V to power Sensor.
(and this library :
https://github.com/vChavezB/SimpleJ1939/tree/main/src)
My main concern is that : if the sensor is powered with 12V or ...
0
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2
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74
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Communication vs Power Arduino
If I want to use an external power source to power up my Arduino through the raw pin and connect its ground to the ground of the Arduino (Arduino Pro Micro), but need to also have USB connected to my ...
0
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0
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208
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Sleep and Wake Arduino Nano 33 BLE
I'm trying to figure out how to wake up and put to sleep the Arduino Nano 33 BLE. I have seen a few post about it but absolutely nothing I can understand or implement. I'm attaching a subset of the ...
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0
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1
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122
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Arduino Nano max current from 5v pin if using 5v 1A wall adapter
I read several answers, but those can be confusing, because it depends on how you provide power to the Arduino.
What if I use a wall adapter with 5 V / 1 A and connect it directly to the Arduino Nano ...
- 103
4
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1
answer
339
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ATmega328PB Sleep Mode Current Consumption
I am using an ATmega328PB to run an RF module. When testing sleep mode current consumption, I noticed it was much higher than I expected. I took off all unnecessary components. The only things in the ...
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97
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Why can my computer not see my Arduino Uno?
I've plugged my ELEGOO Uno R3 into a USB port on my computer with a USB cable. However, neither Arduino IDE nor my computer can see the device. When the Uno is connected, it shows no connected devices....
1
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1
answer
208
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Code review for timer using RTC and OLED screen
I am building a small art project to display my current age with an accuracy of 1/100th of a second. I am using a XIAO SAMD21, a DS3231 RTC, and a 128x32 OLED screen. Here is what it looks like right ...
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1
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96
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ATtiny25 - assembly - BOD disable for sleep mode - error [closed]
If I understood the AVR instruction manual correctly, the ATtiny 25 can disable the BODlevel2 fuse by software, but when compiling with Studio 7 (version 7.0.132), I get the error "Undefined ...
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-1
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2
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327
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How can I get servos to not brownout my Arduinos and power supply?
I have a problem with a project where one servo is resetting (browning out) two Arduino Pro Minis running 3.3v/8mHz. The two Arduinos are connected by SoftwareSerial on pins 9 and 10 and the slave ...
2
votes
1
answer
95
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Confusing language on arduino docs about powering via 3V3/5V pins
I'm reading about powering alternatives for the arduino board, and I have run across two confusing sentences in Section 5, powering via 3V3/5V pin. First, it says:
3V3 and 5V pins can also be used as ...
- 121
1
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1
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192
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WiFiNINA Resetting Arduino Nano IoT 33 When Powered Externally
This is puzzling me: if I power my Arduino IoT 33 Board from USB, everything runs smoothly. Now, if I power it with 5 V on Vin, the board resets as soon as I call WiFiNINA's WiFi.begin(ssid, pass).
Of ...
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4
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1
answer
121
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Can I use regular pins (Example: D2, A3, etc...) as serial (RX, TX)?
Python/Arduino Beginner here...
I have a DFplayer I am trying to hook to my Arduino and I want to hook it up through the regular pins instead of the RX and TX pins, but I've not been able to find ...
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2
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152
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I'm planning on using 2 arduino boards for my project. Should I use 2 voltage regulators for project or use 1 for both?
For context, my first board would contain a motor circuit with an L298N motor driver while my second contains a controlled heating system that uses 2 relays with PTC heating elements, DHT11 sensor, ...
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1
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98
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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()
// ...
- 11
1
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0
answers
121
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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
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73
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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 ...
- 39
0
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1
answer
274
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The Arduino UNO Pin 3V3 have OUTPUT 5V (measured with meter)
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 ...
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1
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1
answer
491
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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 ...
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2
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1
answer
293
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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
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0
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207
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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 ...
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1
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100
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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 ...
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-1
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1
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72
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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
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3
answers
282
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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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-1
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1
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115
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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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1
answer
204
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Code does not run when Arduino is powered by AC adapter
I'm trying to implement the circuit as shown with an Arduino Nano. The project runs fine when powered via the USB port of the Arduino. However, the code freezes when connected to an AC adapter. When ...
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