Arduino newsletter

Top new questions this week:

Why can't most servos rotate more than around 180°

I was looking how a servomotor works. I realized that a standard servo can only turn up to 180°, but I didn't understand why. Is it because of the potentiometer?

servo electronics

asked by roshan timsina 3 votes answered by Chris Stratton 4 votes

How to use a common anode 7-segment, 4-digit display?

Please take this question as an example to (my own) answer below. I've got an 7 segment, 4 digit LED display, but I don't have any idea on how to wire it. I don't understand the difference between ...

led display rgb-led multiplexer 7-segment

asked by Paul 3 votes answered by Edgar Bonet 3 votes

why does it use A0 to define analog pin 0 in some case and why use 0 directly?

https://www.arduino.cc/en/Tutorial/AnalogInput https://www.arduino.cc/en/Tutorial/Knob For first line of both examples(not in comments), it define the same pin, analog pin 0, but they use different ...

pins

asked by Victor He 3 votes answered by uint128_t 2 votes

How to program arduino due without arduino ide

Is it possible to program the Arduino Due without the Arduino IDE? Is there a standalone program that can be downloaded, and be used to upload a .bin file (which has already been generated from the ...

arduino-due

asked by aVC 3 votes answered by Dave X 2 votes

What will happen if I supply greater than 1.1V to analogue inputs if analogReference set to INTERNAL?

I am reading a 50Hz AC voltage using the analogue inputs. If I set the analogReference() to INTERNAL, meaning 1.1V on the Arduino Uno, what will happen if a voltage greater than 1.1V is supplied to ...

analogread adc

asked by M. Hassaan 1 vote answered by Majenko 3 votes

Problems coding a 12 pin 7 segment display and grove temperature sensor with arduino uno

Hi I am trying to code my 12 pin 7 segment display to display the temperature from my grove temperature sensor. I am new to this and I have been struggling if anyone code help that would be muchly ...

How to convert string to long?

There is String.toInt(), but no String.toLong() or the many other variations. Do I have to resort to atol(String.c_str()) or is there a better way to convert a String to a long?

convert

asked by Ana 1 vote answered by Nick Gammon 1 vote

Greatest hits from previous weeks:

What is commonly done to stop a servo after reaching desired position?

When I started Arduino, I did not expect that everything must be contained in an infinite loop. I thought I could just write something like: motor start -> motor stop. But in actuality, what I get is ...

servo

asked by Look behind you 3 votes answered by jdr5ca 6 votes

Receiving SMS by Arduino GSM Shield and control the LED with the content of this SMS?

I am using Arduino GSM Shield receiving SMS from an Android app. And the content of this SMS will control a LED. If the content of this SMS is not "off", the LED will be on and the content will be ...

led gsm

asked by Zhu 3 votes answered by Dave Tweed 3 votes

Can you answer these?

Simplified timezone shapefile suitable for Arduino?

Is there a library or shape file available that allows an Arduino to approximate a timezone based on a latitude/longitude coordinate? There is a timezone shape file available, but it's too detailed ...

timezone

asked by Ana 1 vote

how to detect the incoming message from sim800 GSM module

I am designing an motorcycle security system and I need to receive the message from the user.Hence i need to detect the incoming message and read the number and data from the message

gsm

asked by albin 1 vote

ESP8266 GET OR POST Request Timeout Error

i am using ESP8266 module serially with PC and i also tried it using uno I am stuck at the following point I am able to made connection to server but when i will send the following command POST ...

arduino-uno esp8266

asked by Muhammad Hassaan Bashir 1 vote