Arduino newsletter

Top new questions this week:

Is there a non-float alternative to pow()?

I've scoured the LANGUAGE REFERENCE in the Arduino web-site (https://www.arduino.cc/en/Reference/HomePage), and I can't find a non-Float equivalent to pow() I've got to be missing something big, but ...

variables float mathematics

asked by VIC-20 7 votes answered by Jason Clark 6 votes

7 Segment display dimming

I've got project that needed to have some (4) digits display, and had plenty of 7 seg. displays lying around. I didn't have any multiplexers left but have instead wired it up as per this diagram: ...

transistor arduino-duemilanove 7-segment

asked by Shane Gadsby 5 votes answered by Milliways 2 votes

Arduino Unreliable Serial communication

After reading the following 2 articles: https://hackingmajenkoblog.wordpress.com/2016/02/01/reading-serial-on-the-arduino/ ...

serial communication

asked by qlesk 4 votes answered by Edesign 3 votes

delete the memory or re-upload a program

At the moment I am following the instructions of this project https://github.com/JoernL/LimiTTer. Besides the peripheral parts like a Bluetooth module and an NFC module, the central unit is an Arduino ...

arduino-ide arduino-pro-mini

asked by verticoe 4 votes answered by Dat Ha 0 votes

Hold a random number

I am trying to create a code that has at least 6 servos attached and two buttons for a two player game. I want to be able to roll a random number and have it hold that value then when it is that ...

servo button

asked by mads046 3 votes answered by Dat Han Bag 1 vote

Read time digits from DS1307 and run code based on return

I am currently reading a DS1307 adafruit breakout board and I need to drive two nixie tubes from a shift register. The shift register is running two 74141 IC chips. I have code that loops through all ...

code-optimization shift-register oscillator-clock

asked by Cheddar 3 votes answered by jwpat7 0 votes

Can anybody advise what type of connector this is?

I recently purchased an LiPower shield from SparkFun. I also bought a Lithium Polymer battery off eBay and it appears to have a JST male connector (i could be wrong)? I expected it to slot right ...

pcb-design

asked by Adam 3 votes answered by Ignacio Vazquez-Abrams 9 votes

Greatest hits from previous weeks:

Arduino : What happens if I power the arduino with both the USB and external power voltage simultaneously?

I am a novice user of Arduino. I am not sure whether I can connect both USB and external supply through power adaptor to Arduino simultaneously. Would this burn the controller? Basically, I want to ...

arduino-uno power

asked by Jagat 27 votes answered by Ignacio Vazquez-Abrams 7 votes

How can I connect to an Arduino using WiFi?

I'm working on building a solar powered, Arduino based weather station. The weather station consists of a temperature sensor and a photoresistor, and I plan to add an anemometer in the future. I would ...

arduino-uno wifi xbee

asked by jlbnjmn 14 votes answered by sachleen 17 votes

Can you answer these?

Gui Scale on Linux (Fedora 24)

I use Fedora 24 on my Lenovo Yoga 900, which has an extremely high pixel density display. For these situations on Mac and Windows, I find a gui.scaling option in the Arduino settings. However, on ...

ide linux

asked by mike 1 vote

Getting data from web form

I am using an EthernetServer and EthernetClient with Arduino in order to make a simple webpage. I have a web form for a user to enter various codes that can reset data stored on the back end. However, ...

arduino-mega ethernet web-server

asked by tpm900 1 vote

Getting some unknown characters while trying to connect my SIM900A to my PC

Im trying to connect my SIM900A. While trying to connect I'm getting some junk characters and not able to pass A T Commands Attached are the screen shot. Note:- Im getting the blue light ...

serial shields gsm communication

asked by Satyendu Sekhar Nayak 1 vote

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