Top new questions this week:
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I am trying to make a battery capacity tester (3.7v li-ion 18650 battery) using arduino uno. If possible i'd like to test 20 or more batteries at the same time. I need to measure the voltage of each ...
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I created a program to show a random number on a 7 segment display. It shows a random number in the serial monitor but always shows the same segments 'a c d and g'. anyone know hopw to fix this ...
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evrything worked for a bit and changed to much to get it working again. dont really understand the error.
[![C:\Users\bavob\AppData\Local\Temp\ccyfrkaL.ltrans0.ltrans.o: In function `loop':
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I'm using arduino uno and nrf24l01. to monitor sensor data.
But this is the message that master receives:
βΈ®
this is my slave code.
void monitoring() {
delay(10);
radio.stopListening();
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So the code is working individually for temperature sensor and for heartbeat sensor but when i combine it together it shows wrong values
for the temperature sensor
#include <LiquidCrystal.h>
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I want to measure a 9 V battery via one of the analog input ports of my Arduino Nano. From all the schemes of this great answer, I choose the simplest one, the voltage divider. Assuming the maximum ...
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Greatest hits from previous weeks:
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Asked this question on Electrical Engineering Stack Exchange and was directed here:
Pretty self explanatory; how would I go about converting a float into a char*? I have code in which the float ...
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I'm looking to convert an int value to a char array. currently I've found the following will return [number]
int num = [number]
str = String(num);
str.toCharArray(cstr,16);
Serial.println(cstr);
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I want to have a LED turn on when I push a button and go off when I push the button a second time.
This code doesn't work:
const int buttonPin = 4;
const int motorPin = 10;
const int ledPin = ...
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I've been looking for a while inside Arduino's files to find the core library. However, I haven't found them yet. Where on my hard drive can I obtain the core library files (.cpp and .h) necessary for ...
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I have an Arduino Uno and ESP8266. I want to connect and control an LED from a web server. I made a connection referring to this:
I uploaded the WifiWebServer code to the Arduino, and applied my ...
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I use Arduino and I'm beginner. I use the code below, but I don't understand what stepper.step(num) and STEPS in Stepper stepper(STEPS, 2,3,4,5) are, and I want to use stepper for specific degree and ...
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I need to read a sensor every five minutes, but since my sketch also has
other tasks to do, I cannot just delay() between the readings. There
is the Blink without
delay tutorial
suggesting I code ...
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