Frequency modulation using logic blocks

  Frequency modulation of pulses using and and not logic gates blocks.

MCP23017 example from Adafruit MCP23017 Arduino Library

// I2C IO expander controls an LED via an attached button.

LED bar graph

  Turns on a series of LEDs based on the value of an analog sensor.
  This is a simple way to make a bar graph display. Though this graph uses 10
  LEDs, you can use any number by changing the LED count and the pins in the
  array.

  This method can be used to control any series of digital outputs that depends
  on an analog input.

  The circuit:
  - LEDs from pins 2 through 9 to ground

  created 4 Sep 2010
  by Tom Igoe

  This example code is in the public domain.

  http://www.arduino.cc/en/Tutorial/BarGraph

Firmata Library - Standard Firmata

  Firmata is a generic protocol for communicating with microcontrollers
  from software on a host computer. It is intended to work with
  any host computer software package.
  To download a host software package, please click on the following link
  to open the list of Firmata client libraries in your default browser.
  https://github.com/firmata/arduino#firmata-client-libraries
  Copyright (C) 2006-2008 Hans-Christoph Steiner.  All rights reserved.
  Copyright (C) 2010-2011 Paul Stoffregen.  All rights reserved.
  Copyright (C) 2009 Shigeru Kobayashi.  All rights reserved.
  Copyright (C) 2009-2016 Jeff Hoefs.  All rights reserved.
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
  See file LICENSE.txt for further informations on licensing terms.
  Last updated August 17th, 2017

Projeto simples com FreeRTOS e Arduino

Principais conceitos de RTOS para iniciantes com Arduino e FreeRTOS escrito por Pedro Bertoleti.



Artigo Original no site Embarcados

MCP23S17 IO expander

   MCP23S17_outtest.ino
  
   MCP23S17 library example

Arduino Piano

Arduino Tutorial Mini Piano

Visit the Channel for more interesting projects

https://www.youtube.com/channel/UCks-9JSnVb22dlqtMgPjrlg

Jumper Wires example

Simple example for testing board features.

1- Tests LCD display;
2- Test the red LEDs connected to the PORT.
3- Tests matrix keyboard
4- External eeprom test 24LC512
5- Test RTC PCF8563
6- Test serial port sending
7- Tests receiving serial port
8- Read keyboard and send through serial port

Simple example for testing board features.

1- Tests 7-segment display;
2- Lamp flashes in RA0 (At this moment, change the jumper position to "LED");
3- Tests red LEDs connected to the PORTB;
4- Test the buttons;
5- Test the green LEDs connected to the PORTA.

Simple example for testing board features.

1- Tests 7-segment display;
2- Lamp flashes in RA0 (At this moment, change the jumper position to "LED");
3- Tests red LEDs connected to the PORTB;
4- Test the buttons;
5- Test the green LEDs connected to the PORTA.

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Tests 7-segment display;
2- Lamp flashes in RA0 (At this moment, change the jumper position to "LED");
3- Tests red LEDs connected to the PORTB;
4- Test the buttons;
5- Test the green LEDs connected to the PORTA.

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

Cooler controller for aquarium with meteorological measurement.

Simple example for testing board features.

1- Ask to turn on all dip switches;
2- Tests LCD display;
3- Tests 7-segment displays;
4- Test the red LEDs connected to the PORTB and PORTD;
5- Tests push buttons;
6- Test the serial port transmitting;
7- Test the serial port receiving;
8- Tests AD converters connected to potentiometers;
9- Test Relays
10- Tests temperature measurement;
11- Turn on the Heater;
12- Turn on the fan and measure the speed.
13- Tests the matrix keyboard
14- Tests internal eeprom

LED Sequencer

LED Sequencer

Espressif ESP-NOW Example

/* 
   This example shows how to use ESPNOW.
   Prepare two device, one for sending ESPNOW data and another for receiving
   ESPNOW data.
*/

Espressif ESP32-C3 Blink Example

/* Blink Example
   This example code is in the Public Domain (or CC0 licensed, at your option.)
   Unless required by applicable law or agreed to in writing, this
   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied.
*/

WiFi Web Server LED Blink

 A simple web server that lets you blink an LED via the web.
 This sketch will print the IP address of your WiFi Shield (once connected)
 to the Serial monitor. From there, you can open that address in a web browser
 to turn on and off the LED on pin 5.

 If the IP address of your shield is yourAddress:
 http://yourAddress/H turns the LED on
 http://yourAddress/L turns it off

 This example is written for a network using WPA encryption. For
 WEP or WPA, change the Wifi.begin() call accordingly.

 Circuit:
 * WiFi shield attached
 * LED attached to pin 5

 created for arduino 25 Nov 2012
 by Tom Igoe

ported for sparkfun esp32 
31.01.2017 by Jan Hendrik Berlin

Espressif ESP-NOW Example

/* 
   This example shows how to use ESPNOW.
   Prepare two device, one for sending ESPNOW data and another for receiving
   ESPNOW data.
*/

Espressif ESP32 Blink Example

/* Blink Example
   This example code is in the Public Domain (or CC0 licensed, at your option.)
   Unless required by applicable law or agreed to in writing, this
   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied.
*/

ESP32 Micropython

import machine
import time
led = machine.Pin(2, machine.Pin.OUT)
while True:
	led.value(1)
	time.sleep(1)
	led.value(0)
	time.sleep(1)

Blink LED no ESP32 com o RTOS NuttX

Exemplo simples de como piscar um LED utilizando o RTOS Nuttx no ESP32 escrito por Sara Monteiro.

Antes de utilizar esse exemplo é necessário configurar um emulador de porta serial como descrito na documentação.

Conecte um terminal serial, acesse o NSH (NuttShell) e digite o comando "leds" para iniciar. 



Artigo Original no site Embarcados

WiFi Web Server LED Blink

 A simple web server that lets you blink an LED via the web.
 This sketch will print the IP address of your WiFi Shield (once connected)
 to the Serial monitor. From there, you can open that address in a web browser
 to turn on and off the LED on pin 5.

 If the IP address of your shield is yourAddress:
 http://yourAddress/H turns the LED on
 http://yourAddress/L turns it off

 This example is written for a network using WPA encryption. For
 WEP or WPA, change the Wifi.begin() call accordingly.

 Circuit:
 * WiFi shield attached
 * LED attached to pin 5

 created for arduino 25 Nov 2012
 by Tom Igoe

ported for sparkfun esp32 
31.01.2017 by Jan Hendrik Berlin

Blink LED no ESP32 e Zephyr RTOS

Exemplo simples de como piscar um LED utilizando o RTOS Zephyr no ESP32 escrito por Glauber Ferreira.



Artigo Original no site Embarcados

Franzininho DIY - Contador de pulsos externos

Franzininho DIY - AVR LibC: Timer0

Exemplo simples para teste dos recursos da placa.

1- Testa display de 7 segmentos;
2- Pisca lâmpada em RA0 (Neste momento trocar posição do jumper para "LED");
3- Testa LEDs vermelhos ligados ao PORTB;
4- Testa os botões;
5- Testa os LEDs verdes ligados ao PORTA.

LED switches Ripes PICSimLab example

8051 SDCC led blink

// Blink LEDs : Using Delay Function
// compiled with: sdcc -mmcs51 blink.c -o blink.hex           

Z80 SDCC led blink

// Example of use of uCboard 8255
// compile with:  sdcc -mz80 led.c -o led.hex                

LED Sequencer