Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [arduino]

Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.

-1
votes
0answers
33 views

Turn on led-strip parts using arduino

I am software developer and I am starting my electronics adventure, so I have a very basic knowledge. As a first project I am thinking about arduino and led-strip. I would like to split led-strip to ...
0
votes
0answers
21 views

stm32F401re ethernet shield unable to associate IP address

I bought STM32 F401RE and Ethernet shield HR911105A with MCU W5100. I'm not able to configure simple connectivity with it. I have setup all SPI wires and simple code for setting up IP, subnet, and ...
1
vote
1answer
86 views

Matrix of small incandescent lightbulbs - problem with buzzing

I am prototyping a circuit for controlling matrix display of small incandescent lamps with Arduino (each lamp is 6.3V 0.3A). I designed the circuit in Yenka and built it. It is composed from 3 types ...
0
votes
0answers
37 views

Solar Powered Arduino

I am using a USB Booster Converter as shown in the following link https://www.instructables.com/id/SOLAR-POWERED-ARDUINO-WEATHER-STATION/ and I would like arduino to power off during the day and light ...
3
votes
3answers
201 views

Using Arduino sensors with an STM32

I want to start an electronic project, and found that an ARM based MCU, like STM32F103C, fits my needs more than AVR like Arduino Uno (mostly because of CPU and RAM.) I was wondering if I can use ...
0
votes
0answers
12 views

How can I make my Xbee Pro S1 (xbp24-bsit-004) to be detected by XCTU?

I've been trying to configure my XBEE PRO S1 with XCTU but the programm doesn't detect the radio module. It detects the USB port perfectly but not the xbee. I've tried to add it manually, but ...
2
votes
1answer
77 views

Arduino Vehicle Remote Start

I am really intrigued in the idea of designing a remote start using an Arduino and Bluetooth connectivity. I plan to wire a relay to the starter switch of a motorbike. I have chosen to do it this way ...
0
votes
0answers
41 views

Connect an LCD salvaged from a phone to an Arduino [on hold]

I salvaged a dot matrix LCD display from an old Huawei land phone (ETS2221.) It has 20 pins. I want to know if I can use it with an Arduino. I also need a pinout diagram for it. I have intermediate ...
0
votes
0answers
28 views

MAX11609 - Crosstalk in Voltage Inputs

So I designed a module which can read multiple voltage and current(4-20mA) inputs. This module has been designed with the use of Max11609. After receiving the PCBs and testing them, I observed a ...
0
votes
1answer
21 views

What could be causing an unreliable output for 3 different IS31FL3731 chips

I have a board that uses the Adafruit breakout of the IS31FL3731 to control 81 illuminated switches. I have some code that runs on an Arduino that should turn all the lights on, but only about half ...
0
votes
0answers
32 views

Powering 12 volt DC engine with arduino [on hold]

For my mechanical engineering project I need to power an engine and a solenoid with 12v using relay module and arduino. I have a hcsr04 ultrasound sensor that gives out values and I need to power two ...
0
votes
2answers
35 views

Power Supply for Arduino on breadboard (ATMEGA328PU) from a car battery

I wanna power my Arduino on breadboard (ATMega328PU) from a 12V car battery. simulate this circuit – Schematic created using CircuitLab Is this safe ? What should I add more to make it a ...
2
votes
1answer
59 views

How to measure PWM on Oscilloscope?

I’m measuring the voltage level from an Arduino Uno PWM pin using an oscilloscope. I’m using analogWrite(pin, voltage) in the loop with ...
-2
votes
2answers
54 views

What equipment would I need to detect and decode a signal coming from a scoreboard remote transmitting at 902 mhz [closed]

Would I be able to use some type of software defined radio receiver on a USB stick (https://www.adafruit.com/product/1497) to detect and decode a scoreboard remote transmitter operating at 902 mhz. ...
0
votes
0answers
50 views

pwm RC filter question

I'm new here but been playing with electronics for a while now. I have this project where I'd need to read pwm controlled signal from mosfet. This is how stock application controls pwm valve: I want ...
0
votes
1answer
43 views

5 V from power bank not constant when supply circuit

Now I'm working on my project which contains Arduino, LCD, electromagnetic lock, 6 channel 5v relay and 500V isolated converter. My project was designed to power by using a power bank. Now I use eloop ...
1
vote
1answer
31 views

220v universal motor Arduino control

I bought a 220v 100w sewing machine motor to use it in a project Firstly I thought that the motor works only on ac (because there is 220v written on it) and just for try I gave it 30v dc and ...
-1
votes
1answer
29 views

Using a 7.4 V LiPo Battery for an Arduino Feather 32u4

I am working on an Arduino project at the moment, with the following board: Adafruit Feather 32u4 And it says I need 3.7 V of LiPo to power it. However I also have a valve that I want to open and ...
0
votes
0answers
9 views

16-Channel 12-bit PWM/Servo Shield check if it is powered by adapter [migrated]

I'm using Adafruit 16-Channel 12-bit PWM/Servo Shield with Arduino Uno controller In setup() I have a number of default positions ...
0
votes
0answers
10 views

Aruino RTC using rtclib not understanding functions [migrated]

I am missing something fundamental using RTClib. When I use the rtc.adjust function to change the time in the RTC, I cannot get the updated time from the RTC, just increments a fixed time. I have ...
0
votes
4answers
71 views

How to reduce the current of a battery with an unknown maximum amperage

I'm currently trying to heat a wire to a certain temperature and tests showed that the amperage needed is in the range of 3-4 A. However, I'm having a problem with how to supply such current to the ...
1
vote
1answer
68 views

PID (Arduino) Project - Determining Ki, Kp, Kd

I am working on control system project. I bought a Zumo 32U4. It has built in encoders. The project is divided into three parts: a) Move in a straight line. b) Slows down as obstacle approaches. c) ...
0
votes
2answers
52 views

Arduino Laser Engraver cd drive - what do i connect where?

I am a beginner in the world of circuit boards and electronics, and this is my first real project. I am making a DIY laser engraver, following the instructions in this instructable. Here is the ...
-2
votes
1answer
52 views

How to reduce the range of RF sensors to 1.5m? [duplicate]

I have bought four RF sensors from Robokits - Wireless RF serial link 433 MHz +20 dBm 2 Km range. I want to locate one of them with the help other three sensors by the means of triangulation. My ...
4
votes
3answers
71 views

Using arduino to simulate a pt100 temperature sensor

I want to simulate a temperature PT100 sensor using arduino. What I did till now is on that draw that I attach here. The components were determined by experiments so I guess if there can be some ...
0
votes
0answers
35 views

What if we disconnect Tx and Rx at the time of code execution in UART?

I have interfaced Nodemcu and arduino using UART communication protocol. After uploading the code, When the output is seen on serial monitor,I disconneted Tx and Rx physically. still I can see the ...
-7
votes
0answers
59 views

Idea for Designing a Large Scale Project [closed]

I will be designing the Control Systems of a Rehab Robot using Multiple Microcontroller About 5 atleast for: Motor Controller(42 Digital Output), EMG Controller(20 Analog Input), Absolute Encoders (...
0
votes
1answer
25 views

tp4056 dw01 ground isolation

I'm building a solar project to monitor charge current and discharge current as well as lipo 'State Of Charge'. The configuration is a 5V solar panel feeding a TP4056 which B+/- connect to a MAX471 ...
0
votes
0answers
33 views

Coding for conductivity measurement using Arduino and 16 bit ADC

I am using a 16 bit ADC (Adafruit) connected to Arduino UNO through I2C. When I use differential mode to measure water conductivity (I plug jumper wires into pins A0 and A1 on the ADC), my numbers are ...
0
votes
1answer
62 views

Why stm32 sends invalid data by spi?

Two boards: arduino nano and stmvldiscovery. Boards are connected by spi interface. Arduino is master device. Stm32vldiscovery is slave device. In the txBuf (transmit buffer) both board have the same ...
0
votes
0answers
34 views

CAN BUS ON ATTINY85

I have some difficulty migrating the MCP_CAN_lib-master library to work with tinySPI the goal is to setup the ATtiny85 so that it can read all the can messages on my system currently there are three ...
-1
votes
1answer
58 views

Power supply module is being powered by the arduino [closed]

simulate this circuit – Schematic created using CircuitLab i started a project to try and pilot a 28BYJ-48 5v stepper motor with its ULN2003 board from an arduino Nano, along with some LEDs and ...
-1
votes
1answer
47 views

Oscilloscope measurement of square wave

I am using my Arduino uno to generate a 500Hz Square wave between 0 and 5 volts. I am measuring the signal from the Arduino using an oscilloscope and instead of measuring 5 volts peak to peak, it ...
-1
votes
0answers
41 views

Solar Charged-18650 Battery Bank in parallel with TP4056 modules

for my off-grid project I plan to power an Arduino system using 5.5V 4W panels (placeholder, may source larger panels with same voltage for winter months) and Lithium cells for night operation (...
3
votes
2answers
171 views

Anyone got these optical encoders working? [closed]

I got these Optical Encoders from a local vendor and connected it to my arduino in the following order; (+)----> 5v (-)---> Gnd (01)--->2 (02)--->3 But, it burnt and smoked out as soon as I ...
-1
votes
0answers
11 views

lilypad wifi and bluetooth together [closed]

I would like to use both wifi and Bluetooth with LilyPad, is It Possible? Background: I wanna build a Suit with lilypad and a bunch of sensors built-in it and and the board has to have Internet ...
1
vote
0answers
25 views

How does the timing of the MPU9250 works?

I am using an MPU9250 in my project and I am struggling with the timing domains of the various sensors. Let's say I have the magnetometer ticking at 100Hz, the Gyroscope at 32kHz and the accelerometer ...
-1
votes
0answers
49 views

ATtiny85 ADC always reads 1023 in ADC channel 3

I am trying to measure the voltage of a potential divider using an ATtiny85. When measuring the voltage, ADC channel 3 always reads 1023. I have changed the prescaler settings and reference also, ...
0
votes
1answer
39 views

Are the results for Proteus simulation and hardware testing for same purpose using different controllers comparable?

I have used Proteus design suite for simulating sensors (such as temperature sensor) interfaced to LPC2138. The sensors which were not available in the software, for them I have modelled them as ...
0
votes
1answer
69 views

How do I drive a MOSFET when I have an 11.1v power-supply and an arduino [duplicate]

I am trying to use a irlb3034 as a switch to power an airsoft motor and control it with an arduino. I am using a diode between the source and the drain and a 2.2k resistor between the gate and the ...
0
votes
0answers
22 views

How to have multiple Lora sx1278 connected network? [closed]

I have successfully connected Lora sx1278 two modules transmitter and receiver with Arduino library. I need to have multiple transmitters, where all transmitters will trasnfer data one Master reciver....
1
vote
2answers
106 views

Using Mosfet with seperate Logic Converter and Arduino

I am trying to use an IRLB3034 with an Arduino even though it is not a logic level MOSFET. I am planning on using an LM2937 12v regulator like the schematic below: The connection going off the page ...
0
votes
0answers
38 views

Mbus Optical readout of energy meter?

I have a Sharky 775 energy meter, that I would like to read data from periodically, either using an Arduino/ESP8266/ESP32 or a Raspberry Pi and gather/display data via MQTT. The datasheet and ...
38
votes
6answers
8k views

Why does my circuit work on a breadboard, but not on a perfboard? I am new to soldering

I'm a total beginner when it comes to soldering, and recently I've been trying (and failing) to solder together a simple circuit I put together for a Raspberry Pi sensor. Although it works fine on ...
0
votes
0answers
40 views

TMC2130 with Arduino UNO

I have the Bigtreetech tmc2130 and trying to get it running with an arduino UNO. I have tried using the driver in my 3d printer and it works in SPI mode. I have tested the stepper motor driver with ...
0
votes
2answers
71 views

Protection Against High/Negative Voltage for Arduino

I am currently on a student project where I have to create a portable device that allows the output of sensors connected to it to be displayed on a 16x2 LCD screen using an Arduino Uno R3. One of ...
-1
votes
1answer
83 views

Using WS2812b LEDs in series [closed]

I'd like to convert some of my PC case fans to be compatible with Corsair's RGB system to fit with other case fans. Corsair has an RGB fan hub that allows you to connect RGB fans to it, then connect ...
0
votes
0answers
19 views

How to reverse StepperMotor direction

Currently I am using Arduino UNO and using ULN2003 Stepper Motor Driver. I am using a fingerprint scanner and if the scan matches the stepper motor will first move in clockwise direction and then the ...
2
votes
2answers
105 views

5V to 3V3 - Sensor for Arduino 3V3

I am trying to make a circuit using a 3V3 Arduino and other modules working on 3V3, but I have a problem with an analog water sensor I need to use. The output is a voltage range is from 0.5V to 4.5V. ...