Newest Questions
25,020 questions
-1
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0
answers
73
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MIC5891 and light bulbs: Arduino turns off
I'm trying to drive 3V light bulbs with an Arduino nano and MIC5891 shift registers.
My sample code, an animation that lights up all the bulbs one after the other, and a function that turns on a bulb ...
- 9
0
votes
2
answers
84
views
How to power an Arduino Nano via USB B cable and what precautions to take?
I have an old 56k6 modem, powered via USB-B cable, which I want to repurpose to make another device. Basically I'd like to use the enclosure to house an Arduino Nano and keep the existing power ...
- 17
0
votes
1
answer
58
views
Does adafruit's RTClib actually use master's internal to calculate the real time? does that mean it is volatile?
// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
#include "RTClib.h"
RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "...
- 113
-3
votes
0
answers
113
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Debounce an EC11 rotary encoder [duplicate]
I have an STM32 and a mechanical rotary encoder EC11, that is built to the 1.3" OLED screen.
I have a small menu on the screen and by the rotation of encoder I want to change the selection.
...
- 95
-1
votes
1
answer
46
views
Heltec LoRa32 V3.2 breaks OLED display in Arduino [closed]
I am trying to get the OLED to display on a Heltec LoRa32 v3.2 board.
Known code examples for LoRa V3 boards do not work.
I am using the following pin definitions to control the OLED:
#define OLED_PWR ...
- 1
1
vote
1
answer
41
views
Is there any available software for Intel Galileo Gen 1 in 2026
My Dad gave me an Intel Galileo Gen 1 Kit on my birthday 4 years ago. Now I want to use it.
But officially, instructions and articles and tips from forums don't work. Intel officialy stopped ...
- 13
2
votes
1
answer
128
views
Cannot achieve 7.5 kHz sensor readout, but can reach 17 kHz — how is it possible?
What is the reason for the "strangely" inefficient sensor readout speed?
I made the measurements in different conditions, and have reached the conclusion that... nothing could be responsible....
- 23
0
votes
0
answers
50
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Arduino IDE stopped uploading to an Atmel SAMD51P20 device
I'm using Arduino IDE v2.3.6. I was programming P1AM-200 PLC, based on Atmel SAMD51P20, for months without any problem and suddenly program upload stopped working. It doesn't work with another ...
- 217
-1
votes
1
answer
94
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Guru Meditation Error: Core 1 panic'ed (Interrupt wdt timeout on CPU1) while using LEDC PWM Mechanism on ESP32
Using Arduino Core for ESP32 version 3.3.4 based on ESP-IDF 5.5 and writing code on Arduino IDE version 2.3.6.
The code:
void setup()
{
Serial.begin(115200);
delay(1000);
pinMode(2, OUTPUT)...
- 11
0
votes
1
answer
45
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Camera not connecting to web server Esp32
Below is the code I am using for a camera webserver, followed by error messages. What do I do fix the errors? I have this board
The boards are stacked with pins and connected with antenna
board, ...
- 11
0
votes
1
answer
99
views
Bluetooth HC05 refuses some AT commands
I wish to change the settings of a HC05 to create a Bluetooth server connected to an Arduino Uno. I enter command mode easily keeping the button on the HC05 pressed while powering up the HC05. It ...
1
vote
1
answer
89
views
Computational efficiency?
I have been tinkering with rs485 serial bus.
My message is 7 byte array with layout
uint8 address
uint8 command
int32 data
uint8 checksum
I now serialize and deserialize the int32 with bitshifting.
...
- 11
0
votes
1
answer
151
views
Increase interrupt resolution on Arduino Micro
I have connected an Arduino Micro (not Pro Micro) to an Magtek swipe reader.
Data is connected to pin 3,
Clock to pin 2
And swipe_detect to pin 4.
Then I use this lib to read data from the magstripe ...
2
votes
1
answer
179
views
Software serial and RS485
I have 2 Arduino Nano that will communicate in half duplex mode with transceiver using MAX485. But the master has libraries like Wire.h, uses tone() and also receives UART communication.
I'm a ...
- 123
0
votes
0
answers
107
views
Use of 3 synchronized PWM pins on Arduino Nano
I try to use three PWM pins on an Arduino Nano, each with 10kHz. I know that there are timer0, timer1 and timer3 but I wonder if I can combine them while ensuring all three PWM pins to be in sync and ...
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