Tutorial demonstrating how to build a Raspberry Pi audio spectrum analyzer using a bi-color LED matrix and a Holtek HT16K33 I²C LED controller driver. A 4 channel I²C-safe bi-directional logic level converter is used to handle communication between the 3.3 V Pi and the 5 V HT16K33.
This tutorial demonstrates how to send and receive emails using the SendGrid API from within Python and Node.js applications running on the Raspberry Pi. In addition webhooks will be used to monitor and respond to incoming emails.
This tutorial demonstrates how to host a Rocket.Chat Internet chat server on the Raspberry Pi 2. In addition, Hubot will be configured to interact with chat room users. The bot will respond to commands, send out notifications and interface with hardware connected to the Pi’s GPIO pins.
This tutorial demonstrates how to connect to an Internet JSON weather API from the Raspberry Pi in python and display city temperatures and conditions from around the world on an LCD display. A DHT22 sensor is also connected to display local temperature and humidity.
This tutorial demonstrates how to hook up a graphics LCD display to a Raspberry Pi. I created a Python library for the Adafruit ST7565 GLCD display which lets you draw graphics, display text in different fonts and import image files.
This tutorial demonstrates how to use a Raspberry Pi to program AVR chips and how to use SPI protocol in Python which can be used to communicate between a Pi and an AVR or any other device that supports SPI.
A quick tutorial demonstrating how to install and use LCDProc on the Raspberry Pi. Shows how to write custom python clients including a DHT22 temperature/humidity large font display and a temperature bar graph.
I received a request to make a tutorial on how to use 7 segment LED displays with a Raspberry Pi. This video demonstrates how to hook up and use pulse width modulation (PWM) in Python via the Pi’s DMA hardware to drive dual digit 7 segment LED displays.
A quick tutorial on how to hook up LCD displays to a Raspberry Pi using I²C and control it with Python. Both PCF8574 and MCP23008 chips are demonstrated.
A quick tutorial demonstrating how to interface an HC-SR501 motion detector sensor with a Raspberry Pi and display the result on a 16×2 LCD display. Builds on my previous 2 LCD Display tutorials.