Questions tagged [arduino-uno]

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7 views

how use XCTU configuration software?

I have an XBee 24 module, and I want to program it. I have used the XCTU configuration software, but my XCTU does not have CE. How can I make my module the coordinator? I am using an Arduino to ...
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9 views

Unable to re-flash firmware on USB host using and UNO and ds30 loader

I didn't think the Arduino stack exchange was good for this because I'm only utilising the arduino for its USB to UART capabilities but nothing else. Anyway, a long while ago I bough a USB Host from ...
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1answer
44 views

Where can I find how to use those rf transmitter/receiver

I bought those rf trans/receiver (GWB T400) I figured out that the sck, miso and mosi are for the spi communication. Gnd and 3v3 are pretty clear as well but I’m not sure what rst and cs are for. I ...
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30 views

how can I make my Xbee work like as coordinator? [closed]

please help me... i have 2 Xbee S2 and i am using them for first time when i connect one of them by Arduino to my laptop , it had not any sign of C or E or R and in the radio configuration i can not ...
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24 views

Using a WS2811 12V addressable LED strip with an Arduino [closed]

I've been wanting to start up a project to control LEDs with a microcontroller that will vary according to the music playing. I have almost everything i need at the moment but i am a little confused ...
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2answers
53 views

Newbie Assistance - Understanding Fairy Lights

I'm VERY new to EE and am learning the basics. My first goal is wiring up some small lights for my son's LEGO projects, and am trying to sort out the basics here. Right now, I'm attempting to piece ...
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34 views

Is it possible to combine 2 Arduino codes into 1 sketch for 2 different sensors and output components? [closed]

Based on what you see, I have found 2 different source code for 2 different sensors and output: Simple Auto Fan ...
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0answers
39 views

Parsing Json response SIM7020G arduino

I am currently working on SIM7020G module with Arduino using SoftwareSerial library. I have managed to setup a MQTT connection to my server using AT command and can see the response clearly on the ...
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35 views

MSGEQ7 producing max output for all frequency bands

I have been following a MSGEQ7 tutorial by J Skoba (http://nuewire.com/info-archive/msgeq7-by-j-skoba/) and have set up my circuit in the exact way he has: And I'm using his code: ...
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1answer
63 views

MCP2515 CAN Transceivers can't go higher than 125kbps

So firstly, you'll have to excuse my lack of electronic knowledge and popper terminology, this is my first crack at anything outside of the software world. I have 2 MCP2515 CAN Transceivers (the cheap ...
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1answer
35 views

Trouble understanding a given circuit for an LDR pulse sensor

I'm a second year physics student, part of a group, and we're trying to build a pulse monitor following this guide. This is the schematic I'm having trouble to understand: I have basic knowledge of ...
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48 views

MSP430 UART Reading

I'm trying to transmit and receive data between Arduino Uno and CC430. There is no problem with sending data from CC430 to Arduino Uno. I can receive the data on Arduino side. Also I can transmit the ...
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1answer
36 views

Existence of input signal to LED at photodiode output

I try to make simple LED/photodiode circuit by arduino and 741 op amp. I used mid-IR LED by 200mA current and suitable photodiode for it. I wanted make pulsed signal by digital output of Arduino UNO ...
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28 views

Atmega328p-pu (arduino bootloader) processor freezes/resets randomly

I have updated the schematic of my project. The board for this was produced and all components are soldered to the board. Now I am trying to make a "n20 gear motor" move using the motor ...
1
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1answer
39 views

Can I Use Arduino Libraries in STM-IDE?

I am fairly new to programming microcontrollers and I want to know if I can import libraries, that are written for Arduino, in other IDEs such as STM32CubeIDE. For example can I use the library HX711, ...
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30 views

ATtiny85 Yikes Error While Burning Bootloader

I'm using an Elegoo uno to burn the ArduinoISP example code on to an ATtiny85 SMD. I wired the board according to the "#define USE_OLD_STYLE_WIRING" using pins 13/12/11/10. The wiring ...
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2answers
93 views

Is there a technical reason why the Arduino Uno has such a distinctive board shape?

Why does the Arduino Uno have that slanted shape at the right of the board? Is there a particular technical reason for this design choice, or was it just for esthetics?
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2answers
60 views

Arduino Uno Schematic Parts

I am trying to determine what two parts of the Arduino schematic are (I am quite new to reading schematics). I have circled the areas of confusion. Please let me know what these components do and ...
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32 views

L293D driver DC motors need help to start rotating

I set up this circuit which uses L293D motor driver IC to control two DC motors. +6V input is connected to unregulated power supply. It's current rating is 500 mA. There is a connection between ...
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57 views

Turning on and off two set of Leds with two tactile button (push buttons)

I have two sets of 4 LEDs. Set A (Led1 Led2, Led3, Led4) Set B (Led5 Led6, Led7, Led8) Both sets have its own tactile button: Tactile A, Tactile B, Tactile A, turning on the LEDs set A and tactile B ...
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52 views

New ATMEGA328P-U upload failing

I bought a new ATMEGA328P U with Arduino bootloader incorporated. I put it in the board but the upload is failing. I don't know which bootloader it has... Any idea how to solve it? Should I re-flash ...
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1answer
60 views

Help with electret mic

I'm using this preamp circuit for my electret microphone and then feeding the output to A0 analog pin of an arduino uno board. For some reason my serial monitor in the arduino ide shows the output at ...
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1answer
91 views

How to interface a thermal printer to an Arduino

I've a thermal printer which has TTL, RS232 & a four pin interface. I want to connect it to an Arduino and take printouts with it. It has the following pinouts: RS232 & TTL GND TXD RXD DSR ...
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1answer
37 views

How does this spectrometer sensor output its data and how to process it?

I want to this sensor and an Arduino board to obtain the wave length data and log or plot something like the following: Here it shows how to connect to the Arduino board. But no code and no ...
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2answers
610 views

200 mA output from the Arduino digital output

200mA and 0.2V are needed to turn on a mid-IR LED. Given that the output current of each digital pin in Arduino UNO is 40mA, is sufficient current provided by simultaneously connecting 5 pins to the ...
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2answers
744 views

Arduino UNO voltage drop

My Arduino UNO board is powered with external 5V SMPS through the DC input. On measuring the 5V pin on the Arduino board pinout, I find the voltage to be around 3.7V and the L13 onboard LED glows ...
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2answers
107 views

My DC motor slows down and stops while using an L298N motor driver with an Arduino Uno

Whenever I run a program for running the DC motor, the motor suddenly slows down and finally stops, I don't know why it happens. I use an L298N motor driver, an Arduino Uno, and a 9V battery for motor ...
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23 views

How are the connections made to the driver module as shown in the figure below

How are the connections made from the Arduino, the battery, and the motor to the motor driver module? I am not able to make these connections.
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1answer
67 views

How to use separate power source for raspberry pi + Arduino and motors as shown in the image below

Is it possible to make this circuit or will this work? I want to power the raspberry pi and Arduino with a powerbank and motors with a separate battery through the driver module as the diagram shows. ...
3
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1answer
77 views

ATmega328P development board not working

I've made a development board for ATmega328P like Arduino Uno. Fig. 1 - schematic Fig. 2 - bottom layer Fig. 3 - top layer I am able to upload the code using FTDI chip (I've used the chip which ...
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64 views

Arduino reboots or Hangs Up: Memory/Stack problem?

Using an Arduino Uno. Code runs fine for long periods of time and then either reboots or hangs up. Sometimes problem happens soon after power up. I have been researching causes on Stack Exchange, and ...
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2answers
164 views

Burnt uno A0 pin!

I was making a voltage tester with the Uno and the input was A0. When I went above 10 volts into A0, that pin stopped working. Is it possible to fix the pin? If so, what do I do?
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1answer
41 views

Advice on Arduino project for smart light bulb planning

I'm starting a new project (for personal use), I want to build a circuit that will enable me to control a lightbulb through my phone. I want to use it as an additional lighting at my living room. ...
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57 views

Arduino UNO TMC2130 and Nema 17 Motor

I currently have an Arduino UNO, a stepper driver (the TMC2130 v3.0), and a Nema 17 stepper motor. I was trying to find the correct way to wire the driver and motor to the Arduino in order to simply ...
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62 views

error in DHT11 senosor reading values

Hello guys, I'm creating automatic mini greenhouse using Arduino Uno board on proteus. After compiling the code on Arduino no errors appeared, but after applying the code on proteus with the creation ...
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2answers
52 views

Reading sketch from Arduino UNO

I'm new to Arduino and spent shockingly long on an RFID code variant. Unfortunately someone then snuck into my flat and nicked my laptop. The sketch however is still on my Arduino UNO, is there a ...
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2answers
100 views
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1answer
27 views

PROGMEM problem with my project - dynamic allocation error

My project is and RTISR (Real Time Instant Signal Recognizer). I'm sampling a signal from PIN A0 in the Arduino, and I have 6 types of Signals which I compare with (using squared cross correlation to ...
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0answers
31 views

Load Cell Decreasing Output

I built the following weight system using a Load Cell and Hx711. I am using an Arduino UNO and running the calibration sketch in HX711 library. However, I noted one interesting behavior that you ...
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2answers
43 views

Arduino UNO analog input pins

I'm a student working with the Arduino UNO There's this question always bugging me for the analog input pins, how many samples does it take per cycle. I know it has 10 bit resolution meaning 0-5v ...
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1answer
49 views

Help for checking if PID code

I am designing a PID temperature controler; as far as I managed to write it so far, you find the code below. Can you please help me check if Integrator wind up and other PID elements are configured ...
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0answers
33 views

Programming Arduino Nano through Arduino UNO

I am trying to Program arduino Nano using ICSP but the problem is uploaded program only works as longs as Nano is connected to UNO. Here is what i am trying. Upload arduinoISP program in UNO. Make ...
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2answers
94 views

Is it possible to generate a sine wave formula using values from an array?

so we have an Arduino code which includes an array, is it possible to make those array disappear [in the code] and instead formulate a sine wave formula for those [array] to make the output in sine ...
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1answer
23 views

GSM SIM800C not responding

I'm using Arduino IDE software Arduino Uno board GSM SIM800C BSNL 4g SIM card Interfacing RX (of GSM) to PIN 2 (of Arduino) TX (of GSM) to PIN 3 (of Arduino) GND to GND Power supply For Arduino - ...
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0answers
60 views

I am not able to control speed of a DC motor

I am making an Arduino project in which I have to control speed of DC motor with an ultrasonic sensor. I have written an Arduino program to do this work but unfortunately my motor only rotates in ...
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1answer
189 views

I2C master's output is always 255

We are using two Arduino UNOs as a master/slave for this I2C protocol. We used the first Arduino (slave) as a sensor that will input dummy data (in this case, temperature data). The Arduino (master) ...
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1answer
102 views

Controlling hundreds of motors using an arduino uno

I'm trying to build a haptic feedback suit, which requires me to control over about 576 vibration motors (24x24), using an arduino uno. I have no idea how to do this because the uno has only 13 gpio ...
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0answers
11 views

Interfacing Problem with 16 MG996R servos

I am using 16 MG996R servo motor with PCA9685 servo driver and Arduino Uno, but the motors are not working properly.It works well a Month ago but is not working now. The servo only twich a little when ...
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1answer
95 views

Pull Up Resistor Value for temperature sensor

I read that there needs to be a pull-up resistance for dht22 when connected to arduino. When dht22 is close, arduino's internal resistor value is enough, we have to add external resistor. I want to ...
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1answer
75 views

continuous rotation of servo problem

I am making a solar tracker using MG995 servo motors. The problem I am facing is that as soon as I run the program the servo starts continuously rotating. Can someone please help me to figure it out?...