Author Archives: rdagger

Raspberry Pi INA219 Tutorial

This tutorial demonstrates how to measure DC power consumption with a Raspberry Pi and an INA219 breakout board. The I²C board is combined with a 16×2 LCD display to track voltage, amps and watts.

Raspberry Pi ESC Motor Tutorial

This tutorial demonstrates how to control and measure the speed of a brushless DC motor from the Raspberry Pi using a low cost electronic speed controller. A TCRT5000 reflection sensor is used to measure RPM, the results are displayed on an I2C 7 segment numeric LED display and a push wheel switch allows user input for throttle control.

Raspberry Pi Analog Water Sensor Tutorial

Tutorial demonstrating how to connect analog sensors to the Raspberry Pi using SPI and I²C analog-to-digital converter chips such as the MCP3002 and the ADS1115. Examples include low cost analog water level/detection and water pressure sensors.

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 3.3V Pi and the 5V HT16K33.