Arduino newsletter

Top new questions this week:

Simultaneous output from sonar array

I am working on a project that records the elevation changes of a 1 foot wide section using sonar distance measurement. I have 10 HC-SR04 sensors arranged in a straight line over this 1 foot section. ...

arduino-uno hc-sr04

asked by user3020394 3 votes answered by dpw 4 votes

Replacement crystal on Uno for cold temperatures

I want to run an arduino out in the cold (-40), and use the serial communication - I believe that the crystal is the weakest link (the one for the serial chip) - however I don't see any drop-in ...

arduino-uno electronics system-design oscillator-clock components

asked by user2813274 3 votes

Sound Recognition

I'm looking to recognize a particular sound using arduino uno. I need to recognize a clap sequence to trigger a relay. Having given it some thought i need it to be continuous listening mode with out ...

arduino-uno sound

asked by Ajay Free 3 votes answered by Michael Stachowsky 1 vote

Arduino not running the sketch with external power supply of 9v, but runs the program when connected to pc

Can anyone please help me figure out/ point the reason of this arduino problem? I uploaded a simple arduino sketch (blink an LED ) just to test if my real program was the reason of the "abnormality" ...

arduino-uno programming

asked by Ellimenopy 3 votes answered by dpw 1 vote

How can I use stepper for specific degree?

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 ...

stepper

asked by ReD 3 votes answered by dpw 4 votes

Running quartz clock off an arduino

I am trying to run a clock off of an arduino following this site: http://www.cibomahto.com/2008/03/controlling-a-clock-with-an-arduino/comment-page-1/ and I tried to combine it with this to get it to ...

arduino-uno oscillator-clock

asked by Coolcrab 3 votes answered by Edgar Bonet 2 votes

ArduinoUNO/MEGA, Is there a way to exceed 256 in analogWrite

I am using Arduino UNO/MEGA, I want to analogWrite(pin, val); where the value is 0-1023. How can I make that ? Thanks.

arduino-uno arduino-mega pwm frequency

asked by Mostafa Khattab 2 votes answered by JRobert 5 votes

Greatest hits from previous weeks:

How to toggle LED on button press?

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 = ...

button

asked by Julian Köberle 1 vote answered by Peter R. Bloomfield 5 votes

Parse JSON with arduino to turn on LED

Hi i'm trying to parse JSON resposne from webserver in my arduino in order to turn on and off a LED light. I'm using the wifi client repeating example to make a get request to my server: ...

arduino-uno shields wifi

asked by user1424508 14 votes answered by sachleen 8 votes

Can you answer these?

Is it possible to use Wi-Fi as a wireless connection to my Arduino/Windows PC LAN without using the internet

My Situation and Problem: I am wanting to put together a system to help monitor the soil moisture content in my garden and a small heated greenhouse I use in the winter. Also, In the near future I ...

wifi

asked by dancingBear 1 vote

Can I get my RGBW Neopixel strip to loop perfectly by adjusting rainbowFade2White function in strandtest?

I have been working on adjusting the code for the strandtest RGB and strandtest RGBW to get exactly what I want, which in this case is for the LED strip to transition from one color to another nicely ...

programming arduino-ide neopixel

asked by Kole44 1 vote

Measuring RSSI between two Wi-Fi shields

I need to measure the RSSI between two Wi-Fi shields. One Wi-Fi shield would be working as a transmitter and other one as a receiver. I need to get the RSSI value in one Wi-Fi shield through opening ...

arduino-uno

asked by Khalid Hasan 1 vote