Voice controlled 3D printed robot arm

Voice recognition

Servo motor control

3D printed parts

Arduino code
Full tutorial

Record your own voice commands. Each command will send a 2 bytes instruction to the Arduino. Receive those bytes and control anything with the Arduino.

WiFi YouTube subscribers counter

Real time

7 segment screen

Auto refresh

API key ans jason
Full scheamtic and code

Using the ESP9266 WiFi module we connect to internet. Using the youtube ID and API key we ket the subscribers count an print the value on a 7 segment screen module.

3D printed Arduino based RPM meter

RPM meter

OLED screen

Arduino code

IR sensor

Material list and schematics

We will build a simple Arduino RPM meter with an IR sensor. Print the measured value on an OLED screen. Extra push button for LOW power mode activation.

Huge LED matrix Arduino & MAX7219

Bluetooth connection

Create the android App

8x32 10mm LEDs

BMAX7219 LED matrix drivers

Material list and schematics

Using huge 1cm green LEDs we will create a 8 by 32 LED matrix and display text and unique icons using the arduino and the MAX7219 matrix driver. Easy to build and understand.

Arduino android App bluetooth RGB LED control

Bluetooth connection

Create the android App

Control the PWM signal

Broad variety of colors

Material list and schematics

Learn how PWM with RGB leds work. Create the android App. Make the circuit connections and start a bluetooth connection. Send data and control the color of the LED strip. Awesome right?

Arduino REGISTERS control and interruptions

What is a register

How to change their values

Control ports

Control timers

Interruptions

First we will talk a bit about 8 bit registers of the arduinio, ATMEGA328p datasheet and how to find each register. Then we will see the difference between using Arduino functions or directly register control. Finnaly we will set the register of one timer of the arduino to make an interruption at 2KHz. Inside of that interruption we will create a sort of PWM signal using register control.

Arduino KeyPad door lock

Use of a simplified keypad

Keypad library

LCD password print

Servo motor open the door

Emergency open as well

My door lock is busted so I had to make my own. With a small 4x4 keypad we will insert a password. If correct a servo motor will open a slide door lock. If not an error will show up and we have to try again. The system also has a buzzer and an emergency open button.

Multimeter using Arduino

Easy to build

Arduino control

LCD print of the values

Arduino example code

Resistance, capacitance, inductance, current, power, etc

We will see the basic step of a multimeter. Using simple codes we will be able to measure with quite precision resistence, capacitance, inductance, current and power.

Optic encoded step motor prototype

6400 steps/rev

Arduino control

Optic switch circuit

Arduino example code

3D printed case

Basic step motor are quite expensive and need step controllers modules as well. Here we're going to build a small and precise optic encoded step motor using optic switches. Encode the steps and calculate the rotation degree.

Make it sound. WTV020-SD sound MODULE

Play ad4 sound files

Control tracks using arduino

Play, pause, mute, unmute, stop, sync, unsync

Arduino code

If you have a small microcontrolled project and you want to use sounds this might be the best and chepper way to do it. Upload ad4 files to a sd card and play the tracks using Arduino control. You can easily make a talking robot.

Android app + Bluetooth + Arduino control

Create a new android App

Bluetooth conection with an Arduino

Control blocks and data send

Arduino code

We will create a new App in AppInventor tool from Google. Next we will establish a bluetooth connection between an android smartphone and the arduino and start sending data in order to control our Arduino's outputs.

How to burn the bootloader to a ATmega328p AU

Burn the bootloader

Use of SMD microchips

Program with FTDI

Arduino basics

New microchips are empty, they usualy don't have enything burned in their memory. Without a bootloader the chip won't understand any of the code that you are sending to it. You have to burn a bootloader to it first and doing that to a smd chip is quite tricky.

Multi channel RC transmitter

Up to 32 channels!

A 2.4GHz speed and aprox. 1km of range

Very low cost

Arduino connections and used code
Antenna upgrades

Using just 4 potentiometers, an Arduino microcontroller and a NRF24 radio module we will create 4 channels and send the analog readings of those 4 potentiometers to another NRF24 module used as a receiver.

Radio frequency connection 433MHz

Radio frequency comunication

433MHz module

Arduino connection and used code.

Improve the antenna for better comunication

Small example of how to use two 433MHz modules to comunicate between arduinos. Easy and fun.

Multiple channels radio receiver

Up to 32 channels!

2.4GHz speed and up to 1Km range

Very low cost

PWM or PPM output

Arduino code and connection

Build a fast and powerful radio receiver using low cost module. Connect the arduino, upload the code and star receiving data. You can build your own 32 channels radio controller.

i2c serial LCD comunication

Use just two pins

Much simple code

Low cost

This type of LCD normally uses about 7 pins to comunicate with the miorocontroller. Using a i2c serial comunication that noumber gets down to 2 pins : SDA and SCL

Obtain data from a MPU6050 module

Data storage

Acceleration control

Rotation

Angle

We will make a small code in order to obtain the acceleration and rotarion values drom a MPU6050 module. Doing a little bit of math we can calculate the inclination angle.