rpi

Build Your Own Amazon Echo Using a RPI and ReSpeaker HAT

How to build your own Amazon Echo using a Raspberry Pi and ReSpeaker 2-Mics HAT. Story Introduction ReSpeaker 2-Mics Pi HAT is a dual-microphone expansion board for Raspberry Pi designed for AI and voice applications. This means that you can build a more powerful and flexible voice product that integrates Amazon Alexa Voice Service, Google …

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How to use soft PWM in RPi.GPIO 0.5.2a pt 2 – led dimming and motor speed control

In part 1 of this series, we looked at the basic commands for using software pulse-width modulation (PWM) in RPi.GPIO 0.5.2a and higher. In this article we’ll get a bit more hands-on and into some practical applications for it. It’s all very well being able to make nice square-wave pulses on an oscilloscope, but what’s …

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RPi Tutorial EGHS:Communicating With Other Micro-controllers

What is it? I2C (“eye squared cee”) is a versatile bus invented by Philips, running over two wires. The bus has been extended to be faster and support more devices on a bus, but the standard definition holds up to 128 devices or so (7-bit addressing) and speeds of up to 100kb/sec. (Theoretical max, some …

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