Academy for Arduino

OBDII with Arduino:

Automotive OBDII Monitor and Control - Arduino Academy Interfacing a Arduino to your car or truck computer allows you to monitor the performance of your vehicle and watch for and explain trouble codes. You could build your own custom gauge display,

Driving a salvaged stepper motor with Arduino: https://learnarduinonow.com/2010/08/06/stepper-motors-scavanged-from-old.html

Running a vending machine with Arduino and paying with PayPal:

The Arduino / Paypal Vending Machine - Arduino Academy Ran across this neat article and video at Make Magazine. They attached an Arduino to a candy vending machine, and connected it to the internet so you can pay for the candy using paypal. A fascinating

Build a digital thermometer: https://learnarduinonow.com/2010/11/27/ds18b20-digital-thermometer.html

Sense the light level in your environment with this project: https://learnarduinonow.com/2010/11/26/cds-light-sensor.html

2 temperature sensors on 1 LCD with Arduino: https://learnarduinonow.com/2010/12/02/two-ds18b20-temp-sensors-on-lcd-display.html

Back to the basics. Use PWM to control brightness of an LED: https://learnarduinonow.com/2011/01/31/pwm-led-brightness-control.html

Make your next Wi-Fi project breadboard friendly:

Breadboard Friendly ESP8266-01 / nRF24L01+ - Arduino Academy The cheapest WiFi modules on the market (around $3 each) are the ESP8266-01 boards, which are WiFi enabled microcontrollers in their own right (with limited I/O), or they can be used with an Arduino

If you're into model railroads you may like this: https://learnarduinonow.com/2017/01/02/model-railroad-turnout-control-arduino.html

Ever want to view / control devices at home while on the road?

Setting up a Mosquitto MQTT IOT Broker - Arduino Academy Ever want to view / control devices at home while on the road? As part of our IoT initiative, I have set up a broker based on Mosquitto. Mosquitto uses MQTT, a publish and subscribe mechanism that

Great learning tool --

STEMTera - Arduino in a LEGO Breadboard - Arduino Academy Sparkfun is coming out with a new breadboard that includes a Arduino in a LEGO compatible base. All the ATmega328P and ATmega16U2’s I/O pins are broken out and available. The breadboard has shield c

Simulate a flickering flame with Arduino https://learnarduinonow.com/2016/11/05/arduino-model-railroading-simulated.html

The Simple Way to Create a Raspberry Pi Boot SD Card https://learnarduinonow.com/2016/04/10/the-simple-way-to-create-raspberry-pi.html

AC Current Monitoring, Current Transformers and Burden Resistors

AC Current Monitoring, Current Transformers and Burden Resistors - Arduino In past articles we have covered monitoring DC current for solar and wind based applications. Monitoring AC (grid or grid tie solar) is a bit trickier as voltage flows bidirectionally, and it's

Industrial process control with Arduino? You bet!

Arduino: PLC or PAC - Arduino Academy The traditional Programmable Logic Controller (PLC) is used in process controls and Programmed in Ladder Logic. A more recent evolutionary step is the Programmable Automation Controller (PAC), which

Building a IoT Server

Building a IoT Server - Arduino Academy The "Internet of Things" is one of the most exciting topics around these days. Millions of internet enabled gadgets sending data to a data storage & reporting server, and retrieving

Sending sensor data to a web server https://learnarduinonow.com/2015/12/14/sending-sensor-data-to-web-server.html

Ever want to view / control devices at home while on the road? Now you can:

Setting up a Mosquitto MQTT IOT Broker - Arduino Academy Ever want to view / control devices at home while on the road? As part of our IoT initiative, I have set up a broker based on Mosquitto. Mosquitto uses MQTT, a publish and subscribe mechanism that

How to safely connect a relay to your Arduino (do this if your Arduino keeps resetting!): https://learnarduinonow.com/2017/08/25/arduino-relay-interference.html

More ESP8266 fun! https://learnarduinonow.com/2017/11/14/more-esp8266-fun.html

Control an ESP8266 with Amazon's Alexa: https://learnarduinonow.com/2018/03/31/controlling-esp8266-with-alexa.html

A good intro on using key pads with Arduino: https://learnarduinonow.com/2015/08/23/using-3x4-keypad.html

Counting electrons with Arduino:

Coulomb Counting and Amp Hours - Arduino Academy Do you need to know how much Energy a device is consuming? How about producing? Maybe you want to keep track of how much juice is left in a battery pack? Now you can know! Cliff Note version: Take a

Here's an interesting project:

Arduino connected Micro Epsilon Laser Micrometer - Arduino Academy With the success of our Igaging / Mitutoyo and Harbor Freight digital measuring devices projects, now it's time to turn our attention to the Micro-Epsilon Laser Micrometer, optoCONTROL 2600.

Simple code hack to save battery power on your projects:

ESP8266 Deep Sleep Mode - Arduino Academy My Adafruit HUZZAH Feather ESP8266 consumes 0.080 amps (80 ma) in normal operation. With one wire and a single line of code, I can drop that to about 0.010 amps (10 ma), according to my USB power

Quick, easy to make bench power supply: https://learnarduinonow.com/2018/01/11/atx-bench-power-supply.html

Using a keypad with Arduino, a great intro tutorial: https://learnarduinonow.com/2016/01/02/using-4x4-keypad.html

A nice tutorial for beginners on adding an LCD to the ESP8266: https://learnarduinonow.com/2018/04/17/adding-lcd-to-esp8266.html

If you're into model railroads this is for you: https://learnarduinonow.com/2016/11/06/arduino-model-railroading.html

Switching high-current loads with Arduino:

Logic Level MOSFETs, IRL or IRF? - Arduino Academy If you need to switch a dc load, a MOSFET is a very useful component. Typically carrying much more current than a standard transistor, and better performance characteristics, like a high impedance

Arduino gas sensor tutorial: https://learnarduinonow.com/2012/04/01/gas-sensor-tutorial.html

Use an Arduino for RFID access control: https://learnarduinonow.com/2014/03/24/rfid-access-control.html

Measure wind speed with Arduino:

RPM into MPH? Building a Anemometer! - Arduino Academy I'm building an anemometer to measure wind speed. I'm building the typical 3 cup style anemometer, and using a hall effect sensor (digital, non-latching) to trigger an arduino (or esp8266).

Arduino ESP8266 WiFi, on the Cheap!

Arduino ESP8266 WiFi, on the Cheap! - Arduino Academy If you are looking for Wifi for for your Arduino Project, look no further! For less than $9 you can add wifi capability to your Arduino Project, without loading down your Arduino with a bunch of

Build an Arduino based weather station: https://learnarduinonow.com/2017/06/24/esp8266-bme280-weather-station.html

Blend Arduino with Nintendo: https://learnarduinonow.com/2015/12/27/arduino-nintendo-ds-touch-screen.html

Use Arduino to find the average and median of a set of numbers with this sketch: https://learnarduinonow.com/2017/06/30/median-vs-average-arduino-calculations.html

Some folks may find this useful: https://learnarduinonow.com/2017/11/21/arduino-and-raspberry-pi-holder.html

Quick primer on fly back diodes:

Flyback Diodes - Arduino Academy Flyback Diodes are used with inductive loads like dc motors and relays. Lets use a relay for an example. A common relay has a 12v 120 ohm coil. In use it draws .1 Amps. When you turn off the power,