Arduino newsletter

Top new questions this week:

Why use a motor driver board?

I'm just getting into electronics in general and I'm confused a bit as to why I'd want/need to use a motor driver board instead of just setting up my own transistor/diode/etc when attempting to power ...

arduino-uno

asked by Mythics Winter 3 votes answered by Majenko 5 votes

How to read RPS for fast rotation with status change method in Arduino?

Trying to calculate the coming RPS from rotary encoder. I am trying to get it through checking the status by digitalread. However, I can not get more than 6 rps. Any solution? I will be obliged for ...

arduino-uno

asked by zalt 3 votes answered by KIIV 0 votes

RF24Mesh master-base node communication delay

I'm trying to build a mesh network using 4 nRF24L01 modules directly connected with Arduino Uno where 1 module is master node and the rest are base nodes. The workflow is exactly as follows I'm ...

arduino-uno serial nrf24l01+

asked by somnathbm 3 votes

Implementing interrupts and timers on an arduino board

I am trying to implement interrupts on an Arduino Uno board. My goal is to synthesize waves and play them via a 3.5 mm jack. This is what I have so far, based on some code I was provided. I have ...

untagged

asked by user2593024 3 votes answered by Nick Gammon 3 votes

Why do I get a compiler error when I'm pretty sure I have such method?

Code (I've omitted much of the code, and left just the outline and code probably relating to the error.) SelfDrivingCar.ino #include "JKMain.h" void setup() { JKMain::setup(); } void loop() { ...

arduino-uno programming c++ arduino-ide code-review

asked by Sir Jony 3 votes answered by J. Piquard 2 votes

RF24 Network and Payload

i struggle to figure out the max payload for the RF24 Network library without payload fragmentation. It uses a NetworkHeader with the Attributes from_node, to_node, id, type and reserved. This must be ...

nrf24l01+ network

asked by strangeoptics 1 vote answered by Chupo_cro 2 votes

Do we need to burn bootloader in new Atmega328p before uploading the arduino code

I have an arduino code which is working fine. Now I am planning to make a PCB out of it. But I do not want to use the complete Arduino board. I just want to use the Atmega328p microcontroller. So my ...

atmega328 bootloader

asked by S Andrew 1 vote answered by per1234 3 votes

Greatest hits from previous weeks:

How to identify Arduino Mini Pro 5v vs 3.3v

I have many Arduino Mini Pro, every from different seller. Few are 3.3v and most 5v. I had to clean table for Xmas and now I do not have any idea how to identify 3.3v Arduinos. They do not have any ...

voltage-level

asked by Max 5 votes answered by Jon 8 votes

Arduino not detected On El Capitan Public Beta 6

Since I updated to El Capitan Public Beta, my Arduino Uno doesn't show up in the serial devices list. The System Information utility shows an Arduino connected on the USB port (as 'Communication ...

arduino-uno serial ftdi osx

asked by duci9y 3 votes answered by Jake C 4 votes

Can you answer these?

Erratic behavior from 'randomly' generated values in array

Currently working on a data collection algorithm on the Arduino MEGA (ATMega1280) and I've run into a problem with some of the code I've written. I feel my problems may be stemming from the way in ...

serial array struct

asked by Justin Shetty 1 vote

Opening and closing a hatch with different switches

I'm new to the whole Arduino thing and I'm not much of a programmer myself so I need some help... The goal is to have 4 buttons which a person who operates it gives out different outputs from the ...

arduino-uno relay

asked by Allaaan 1 vote

GSM shield 2 - Fully erase memory buffer

I would love to get real developers' input regarding the following issue as I've been spinning my head around it for a while now. What I'd like to do My program receives SMS containing simple ...

arduino-uno gsm

asked by Manitoba 1 vote