Share tips you have come across

[LarryD]

Arduino links of interest.

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How to use this forum:

How to get the best out of this forum

Welcome to the Arduino forum! A guide explaining how to get the best out of this forum is available at the link below. Please read it:

Example sketches:
https://docs.arduino.cc/built-in-examples/

Getting started:
https://www.arduino.cc/en/Guide

Arduino Programming Course
Programming course

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Listing of downloadable 'Arduino PDFs' :

Either Google >>>- - - - > arduino filetype: pdf
Or click the link immediately below:
100s of PDFs for Arduino

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Arduino MASTERCLASS | What can Arduino do? PART 1

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Get Started in C++ Programming

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Listing of downloadable 'C++ PDFs' :

Either Google >>>- - - - > C++ filetype: pdf
Or
100s of C++ PDFs

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Arduino cheat sheet:

Arduino_Cheat_Sheet-11-12-13.pdf

Watch these:

Arduino programming syntax:
https://m.youtube.com/watch?v=CbJHL_P5RJ8

Arduino arithmetic operators:
https://m.youtube.com/watch?v=UUx0_s-ElSs

Arduino control flow:
https://m.youtube.com/watch?v=QpPGGuaGbCA

Arduino data types:
https://m.youtube.com/watch?v=xmZXWMEltEc

Understanding Destructive LC Voltage Spikes:

Pololu - Understanding Destructive LC Voltage Spikes

OR

destructive_LC_voltage_spikes.pdf

Flyback diodes and why you need them

Any component that relies on an electromagnet or coil of wire for its operation will be inductive, that is the nature of coils of wire. Common examples are relays, solenoid and most types of motor. It is standard practice to put a 'flyback' diode across any inductive load in order to catch the back emf from the inductor when the current is interrupted. This requirement is usually taken at face value without being backed up by any kind of test results or evidence. This tutorial provides the evid…

# Seven Habits of Successful 2-Layer Board

Seven Habits of Successful 2-Layer Board Designers

Why decoupling capacitors:

"You must Unlearn what You have Learned"

Some things to read

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LCD information:

Character LCDs

OR

character-lcds.pdf

Reading a schematic:
https://learn.sparkfun.com/tutorials/how-to-read-a-schematic

Language Reference:

Arduino Reference - Arduino Reference

Foundations:
https://www.arduino.cc/en/Tutorial/Foundations

How and Why to avoid delay():
http://playground.arduino.cc/Code/AvoidDelay

Demonstration code for several things at the same time.
http://forum.arduino.cc/index.php?topic=223286.0

How to power a project:
https://learn.sparkfun.com/tutorials/how-to-power-a-project/all

Ladyada's Learn Arduino - Lesson #0:

Ladyada's Learn Arduino - Lesson #0

Multitasking:
Part 1:

Multi-tasking the Arduino - Part 1

Part 2:

Multi-tasking the Arduino - Part 2

Part 3:

Multi-tasking the Arduino - Part 3

Sparkfun Tutorials:
https://learn.sparkfun.com/tutorials?page=all

Micro Controllers:

Digital Circuits 7: MCUs... how do they work?

Useful links:
https://forum.arduino.cc/index.php?topic=384198.0

Arduino programming traps, tips and style guide:

Gammon Forum : Electronics : Microprocessors : Arduino programming traps,...

Arduino programming course:

Arduino Programming Course Contents

Jeremy Blume:

Arduino products:

Arduino Hardware

Motors/MOSFETs

Gammon Forum : Electronics : Microprocessors : Driving motors, lights, etc....

MOSFETs

Making a library
https://docs.arduino.cc/learn/contributions/arduino-creating-library-guide

Switches:

Gammon Forum : Electronics : Microprocessors : Switches tutorial

Arduino Cookbook: Recipes to Begin, Expand, and Enhance Your Projects: Margolis,...

Soldering FYI

PACE Inc. Soldering SMD fine pitch component (8a) Hot Air Mini Wave Soldering

Professional Hand Soldering: Surface Mount QFP 208 Fine-Pitch

Master Soldering: Surface Mount Fine-Pitch - Highly Recommended

Professional SMT Soldering: Hand Soldering Techniques - Surface Mount

Master Soldering: IPC J-STD-001 Chip & MELF soldering

Professional Solder Training - How to: Surface Mount DPAK

Professional Soldering: Hand Soldering Techniques - Lead Free

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Servos

https://www.sparkfun.com/servos

https://learn.sparkfun.com/tutorials/hobby-servo-tutorial

Tips and Traps

Gammon Forum : Electronics : Microprocessors : Arduino programming traps,...

Share tips you have come across, 900+ posts:
https://forum.arduino.cc/index.php?topic=445951.0

Debug discussion:
https://forum.arduino.cc/index.php?topic=215334.msg1575801#msg1575801

Frequently Asked Questions:
https://support.arduino.cc/hc/en-us

SMD soldering:

soldering smd - Bing

Serial Communications

Serial Input Basics - updated

Updated Version Please note that this is a revised version of the advice in this earlier Thread which has become very long. As far as possible I have kept the code examples identical or simplifed them slightly. It should not be necessary to refer to the older Thread, but feel free to do so. Contents The following sections are in this Tutorial Introduction Serial data is slow by Arduino standards Example 1 - Receiving single characters Why code is organized into functions Exampl…

nRF24L01

Simple nRF24L01+ 2.4GHz transceiver demo

Introduction The nRF24L01+ 2.4GHz transceiver modules are cheap and very effective but I have come across a few Threads in which people were having trouble with them so I thought it might be useful to gather together in one place a basic step-by-step sequence for getting them to work. EDIT 03 Feb 2021 - For this Tutorial install Version 1.1.7 of the RF24 library (available with the Arduino Library Manager). More information in Reply #30. Edit 29 Aug 2016. I have today downloaded and successfu…

How to make and post a schematic:

How to make a schematic you can post.

When you submit a question on the forum you will usually need to add a schematic (circuit diagram). The tutorial that follows will explain some ways to create a useful image; however lets start by explaining how to add the image to your post. Its easy. Having created the image all you need to do is : Save the image somewhere convenient - maybe your desktop Start your post, and place the cursor (insertion point) where you want the image to be shown; [upload image to forum] 3: click th…

LEDs

How LED works ⚡ What is a LED (Light Emitting Diode)

Relays

Arduinos with relays

Number 'type's.

• boolean (8 bit) - simple logical true/false, Arduino does not use single bits for bool
• byte (8 bit) - unsigned number from 0 to 255
• char (8 bit) - signed number from -128 to 127. The compiler will attempt to interpret this data type as a character in some circumstances, which may yield unexpected results
• unsigned char (8 bit) - same as 'byte'; if this is what you're after, you should use 'byte' instead, for reasons of clarity
• word (16 bit) - unsigned number from 0 to 65535
• unsigned int (16 bit)- the same as 'word'. Use 'word' instead for clarity and brevity
• int (16 bit) - signed number from -32768 to 32767. This is most commonly what you see used for general purpose variables in Arduino example code provided with the IDE
• unsigned long (32 bit) - unsigned number from 0 to 4,294,967,295. The most common usage of this is to store the result of the millis() function, which returns the number of milliseconds the current code has been running
• long (32 bit) - signed number from -2,147,483,648 to 2,147,483,647
• float (32 bit) - signed number from -3.4028235E38 to 3.4028235E38. Floating point on the Arduino is not native; the compiler has to jump through hoops to make it work. If you can avoid it, you should. We'll touch on this later. Sparkfun.
• You select the 'type' best suited for your variables.

ex:

• your variable does not change and it defines a pin on the Arduino. const byte limitSwitchPin = 34;
• since an analog variable can be 0 to 1023, a byte will not do, you can select 'int'. int temperature;
• if your variable needs to be within -64 to +64 a 'char' will do nicely. char joystick;
• if your variable is used for ASCII then you need type 'char', char myText[ ] = "Raspberry Pie Smells";
• if your variable enables some code then boolean can be used. boolean enableFlag = false;
• millis() returns the time in ms since rebooting, unsigned long currentTime = millis();
  etc.

Arduino Math

Five Arduino math fixes for when it is wrong - Bald Engineer

EEPROM

Arduino EEPROM stores any datatype - Bald Engineer

Oh, and have fun too !