Category Archives: Raspberry Pi

Pi Audio Spectrum Analyzer

Raspberry Pi Spectrum Analyzer

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.

Raspberry PI Sending & Responding to Emails

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.

Raspberry Pi Rocket.Chat

Raspberry Pi Chat Server with Hubot

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.

International Weather Clock

Raspberry Pi International Weather Clock

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.

GLCD Tutorial

Raspberry Pi Graphics LCD Display Tutorial

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.

LCDProc Tutorial for Raspberry Pi

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.

7 Segment LED Tutorial for Raspberry Pi

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.