Questions tagged [arduino]
Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.
8,876
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missing boards manager on arduino IDE using Rasberry Pi [closed]
So, I'm trying to use an ESP32 module for a project, but I do not have the boards manager in the Arduino IDE to install the necessary library. I am running the IDE on a raspberry pi 4 (I think) ...
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1
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OV7670 QQVGA RGB565 config
Does anybody has register configuration for OV7670 QQVGA RGB565?
I found this but I'm not sure that it gives QQVGA resoltuion.
...
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Short Circuit Detector using Arduino Uno [closed]
i need help on making a Short Circuit Detector using the Arduino Uno. I don't know how to do the coding. please help me
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25
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Powering BLDC motor with 20V 2.5A battery
I have a Pichler Boost 20 motor. Max power load is at 25A/30s, recommended batteries are LiPo 7V or 11V. However, I'm generally against using LiPo batteries. I have however multiple batteries ...
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Can I use a handheld spectrophotometer to calibrate my TCS3200-based fluid color assessment system?
I'm trying to build a system that measures color and turbidity within the tube that exits a patient's brain. Using a TCS3200 sensor and an Arduino micro, and a custom-made housing to ensure a dark ...
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1
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56
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Is there an RTC with alarms I can use without an Arduino/microcontroller?
I have a simple project planned for which the electronics component boils down to a clock unit triggering a 555 timer twice a day. The DS3231 seems perfect for this but seemingly requires including a ...
2
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2
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466
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Can I cascade two different shift register?
I would like to drive multiple nixie tubes using shift register. I wonder that can I cascade two different shift registers to control them using arduino or another MCU? My plan is to connect DATA OUT ...
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ADC interrupt flag in ATmega2560
If we look to datasheet of ATmega2560
https://ww1.microchip.com/downloads/en/devicedoc/atmel-2549-8-bit-avr-microcontroller-atmega640-1280-1281-2560-2561_datasheet.pdf
In the ADC Section, page 285, it ...
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How would I decide on the best LED intensity for TCS3200 sensor
This is for a custom project to detect fluid color and turbidity (a reduction in light passing through) using an Arduino micro, a TCS3200 sensor, and an LED. The tube sits in a custom housing, and the ...
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1
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44
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Arduino pro mini 3.3v where are the digital pins 0 and 1 [closed]
I am using an Arduino Pro Mini, 3.3V, 8MHz board. Now I need to use the digital pins 0 and 1 as I have already used pins 2-12.
I am not sure where the digital pins 0 and 1 are located on the board. ...
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College senior design problem - Arduino and prop motor [closed]
I'm making a buoy that uses an Arduino, GPS, and prop motor to hold its location. Everything works except we've developed a new issue: The prop motor wont turn on unless you cycle the power. The code ...
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Why Serial output data not showing using CH9102F?
I have hardware electronics, custom designed, that use the IC CH9102F for USB to UART communications. On Arduino Studio 2.x for Windows 11 it uploads fine the firmware code however when I want to see ...
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ATmega32U4 not appearing on Windows [closed]
I have made a custom PCB that contains a ATmega32u4-AU at its core. I have assembled the board, but when I connect it to my computer I am getting no response from it anywhere on my computer. It isn't ...
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How to Power 2 MG996R Tower Pro Servo
I tried powering a MG996R Tower Pro (180 deg metal gear) servo from an Arduino UNO and ended up hibernating the host PC.
I want to power two such motors (in parallel configuration) for 10 minutes a ...
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27
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Powering Arduino with external regulated 5V
I'm planning to create a custom Arduino Uno shield for a test jig I'm making. The shield will have an external regulated 5V source, and I'm looking to use that to power the Arduino. I've read a few ...
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Arduino Nano freezes at random times when motor is connected
I am to run a motor and control it with an Arduino Nano. I want to send signals to the nano with the usage of an nrf24l01. The correct use is that by default the motor will spin at a certain speed and ...
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Generating 3phase SPWM waveforms having control over the frequency from 10Hz to 800Hz
I was referring to web and I got one YouTube video similar to my project but i was not able to get output as shown in the video. I need your help how to rectify the problem. Can someone please verify ...
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1
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33
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What ESC matches criteria? [closed]
Is there any ESC, that takes PWM from an Arduino as an input, has three wires for three motor phases and has three wires for the hall effect sensors? Does this match my criteria Product ?
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Programmer is not responding error
I currently am running into problems with my new Arduino board. The complete details are here with log info and other troubleshooting steps https://forum.arduino.cc/t/programmer-is-not-responding-...
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Interfacing ADC12138 with Digital Discovery using SPI
I am trying to interface ADC12138 ADC over SPI channel to Digital Discovery to read the single ended analog voltage in the rang of 0-4V on channel 2.
As described in datasheet section 1.0
Snapshot ...
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44
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SLF3S-4000B not recognised by Arduino Uno R3
I have a Sensirion SLF3S-4000B connected to SDA/SCL lines of the Arduino uno through a logic level shifter (connected like in this example: https://learn.sparkfun.com/tutorials/retired---using-the-...
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64
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Peltier pad issues [closed]
I am trying to make a Hot air balloon using this peltier pad connected to an arduino uno r3 by elegoo, which is powered by a duracell 9 volt battery. However, the peltier pad is not getting up to the ...
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4
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912
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What is the disadvantage of using a boost converter? [closed]
I am referring to this boost converter.
I want to know the disadvantage of this. It isn't possible that this could just generate free voltage, there would be some disadvantage. I actually need this ...
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Should two potentiometers be powered by same source or separate?
I have two potentiometers. One measures the water in a tank up to a certain point. The second takes over after that and measures the water above the first. Currently I am powering both at the same ...
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49
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Using 7pin OLED 128x64 with iic
I just bought the 0.96” Monochrome OLED Display (SSD1306) and it claims to support both SPI and IIC/I2C with 7 pins.
I want to use it with an Arduino Uno R3.
How do I go about doing this and ensure ...
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2
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72
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Thermistor misreading
I'm currently working on a hotplate project with an ESP32, utilizing a 10k ohm NTC thermistor (B57550G1103F000) capable of measuring temperatures up to 300°C. However, I'm encountering issues with ...
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73
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Using an LT1357CN8 to amplify the signal of a 1.5 MHz frequency generator
I am working on a frequency generator to control piezoelectric transducers. I use an Arduino Uno R4 Minima to send data to an AD9833 which creates my desired sine wave up to the required 1.5 MHz.
...
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25
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ESP8266 with 1C5V Relay - always ON
Please find the circuit:
I am using NodeMCU ESP8266 and 1C 5V Relay. ESP8266 board is connected to the USB port of laptop and it is powering the board. The problem is, whenever I upload the code to ...
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67
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How to use one USB-C port between 2x ESP32-S3 - Switched by toggle switch?
I am trying to switch over a USB and it's associated Data +/- traces with a physical toggle switch.
I've tried to work out how to do it with just the switch, but I don't think that would work as it ...
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53
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Arduino RPM Calculator Weird behavior
Long time user, first time poster. I've started to fiddle around with Arduinos and electronics and I still have a hard time grasping some of the basic concepts sadly. Here is my issue.
I have this ...
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How does this debounce circuit (from Arduino Portenta Edge Control) works?
I stumbled upon this part of the schematic (page 2) of the Arduino Portenta Edge Control (shown below), which – in my eyes — seems to be a debounce circuit, but more complex than the one shown in this ...
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Dimming for high power led
I've tried dimming led using driver(model jls-7265-50w) and using simple circuit with mosfet IRF540 transistor on output of driver. But this circuit didn't work well. When i decreasing pwm around pwm =...
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55
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Transistor as a switch with square wave input [closed]
I want to construct a circuit that contains a transistor and a LED. I have a supply square wave input voltage(0-5v). Help me to construct a circuit when input is 0v ,if LED on and input is 5v then ...
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STEP Motor Maximum Speed
Hello I'm struggling with getting my nema 23 step motor(3A max) to achieve maximum speeds and I'm wondering if its the algorithm or the motor driver. I'm using 24 volt power supply with TB6600 step ...
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How to read switch matrix with 74HC595
I would like to control the columns of a keypad with shift register.
The working prototype, using direct connection is here:
https://www.tinkercad.com/things/gRSmEPcnCXZ-3x3-switches-matrix
I wanted ...
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Digital Potentiometer Not Responding in Custom PWM Circuit with Arduino
I've designed a circuit to generate a smoothed PWM signal using an Arduino, which then undergoes attenuation, amplification via a non-inverting op-amp, and finally has an approximate offset of 0.9V ...
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3
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How is the sweep of duty cycle handled in common microcontrollers? [closed]
I have designed a PWM module in Verilog, and it was giving me a glitch. After debugging it for some time, I found that the value of the duty cycle was changing twice within a certain period.
How do ...
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2
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4
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An aspiring electriconic engineering hobbyist -- How should I go about this? [closed]
I'm a full-time maintenance technician with no University education (though I did get college credit in highschool for physics and statistics 9 years ago), and I have plenty of interests I want to ...
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1
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Flash memory corruption possible reasons?
I am working with an external Serial Flash memory (Winbond 25Q80). I could read-erase-write the flash memory using SerialFlash library in arduino environment. But it seems data of flash memory gets ...
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1
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76
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Running TMC2240 Stepper Motor Driver with Arduino?
I am attempting to run a Nema 17 stepper motor with the BigTreeTech TMC2240 stepper motor driver. I am connecting to the driver module with an Arduino UNO R3 board, and I'm using Arduino IDE v2.3.0.
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How supply an outdoor string light with 10 LED bulbs 0.8W?
I currently have a outdoor string light with 10 LED bulbs 0.8W powered by a 3.7V lithium battery and recharged by a solar panel (5.5V 295mA).
Over time the battery discharges and no longer works. I've ...
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2
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IRF630N MOSFET burns after a couple of times in use [closed]
I made a simple circuit using an IRF630N to drive my loud buzzer. The Arduino code is very simple, just high and low on the pin for a fraction of time. Following is the schematic of the circuit
After ...
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How to power an audio-level meter / VU meter in a midi-controller project?
I'm building an Arduino-based midi fader controller, and want to also add an audio VU / Level Meter to the enclosure.
The Arduino is USB-powered.
I bought a standalone audio level meter on AliExpress, ...
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How do I set up the wiring for a SPX-18572 and Arduino Leonardo to use LoRa?
I was trying to find a guide to use the SparkX LoRa SPX-18572 with an Arduino Leonardo, but I could not find any guides to using these technologies online.
I'm hoping someone on here knows how to use ...
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1
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51
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SSD1306 128x32 OLED change I2C address
Hey all I've been looking for any information that would allow me to change the I2C address for the 0.91" OLED 128x32 module:
So far I have only found mention of the I2c address change here but ...
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39
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How to measure frequency of aperiodic signal in simulink when you are getting that signal through arduino?
Actually i want to measure frequency of a signal that i am getting thorugh arduino . I am getting almost correct voltage value near 220V that is value of our national grid and frequency in our ...
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3
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102
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Capacitor can't filter the AC detector spikes
I made a simple design to read the status of an 220 V AC relay. I used a diode and resistor to drop the voltage for the PC817 optocoupler and used a capacitor to filter spikes:
This is the test ...
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ledcWriteTone leaking to other pin?
I've recently written a program that involves two blinking LEDs. I have these LEDs wired straight from the pins into GND. One is set to blink on and off on one second intervals, and the other is fed a ...
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67
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Remote controlled motor for quadcopter does not slow down when signal is sent
I am trying to build a quadcopter with an Arduino Nano. The controller consists of a Arduino Uno with a joystick and an NRF24L01 (transmitter). The quadcopter is made of an Arduino Nano, a NRF24L01 (...
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1
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63
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ATTiny85 won't reprogram
I am using a tiny AVR programmer to program code specifically this one, https://www.amazon.com/dp/B00B6KNJRY?psc=1&ref=ppx_yo2ov_dt_b_product_details , I can successfully upload code onto a blank ...
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