The Amp Hour · 16 Jul 2015 · 1h 16m · Episode 258
Bertrand Irrisou and Gerald Friedland of Audeme discuss their ASR Shield, a credit-card-sized Arduino add-on that enables offline, speaker-independent voice recognition without cloud dependency. They explain how the board uses an Allwinner A13 ARM Cortex-A8 processor running Linux to run acoustic and language models, allowing users to program hundreds of custom sentences via a simple Arduino library. The founders detail the technical challenges of audio front-end design, including automatic gain control and handling echo, while noting the system's ~3W power consumption and the necessity of adult-voice training data which affects recognition for children.
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The host of The Electromaker Show reviews the February Electromaker of the Month winners, including a LoRa walkie-talkie by Kutlahan Akta, and celebrates the 10th anniversary of the Raspberry Pi. He discusses a faithful Sol-20 retro computer recreation using a Raspberry Pi, reviews the Blues Wireless Notecard for cellular IoT, and highlights a Cornell University project for silent voice command recognition via lip reading.
Hosts Elecia White and Christopher White discuss their recent personal projects, including White's work with analog synthesizers like the Kastle Synth and Roland SE-02, and White's enrollment in Udacity's Self-Driving Engineer nanodegree to learn machine learning and sensor fusion. They answer listener questions regarding microcontroller selection, the history of consulting at Logical Elegance, and the contents of a hypothetical $1,000 embedded systems training kit. The episode also covers book recommendations, amateur radio hardware like the QRP Labs Ultimate 3S, and the show's future plans.
Hosts Elecia White and Christopher White answer listener emails, discussing career advice for self-taught engineers and physics graduates entering the embedded industry, and technical comparisons between ARM Cortex-M and Cortex-A processors. They also address hardware design questions regarding the use of RJ45 connectors for non-Ethernet signals and discuss the potential of Adobe's Project Voco for audio editing. The episode concludes with show announcements, including a SparkFun contest, a planned meetup in Santa Cruz, and recommendations for educational hardware like the SparkFun Tinker Kit, Sphero, and Jewelbots.
The host reviews the CODIS Tech Cafe sign language translating glasses, which use a Raspberry Pi 0 2W and Viam's cloud-based AI to convert sign language to speech in real time. He highlights the Adafruit 9-DOF Absolute Orientation IMU Fusion Breakout for its ease of use and pre-filtered data, and the Conexio Stratus Pro, a development board featuring the nRF9161 cellular IoT chip. The episode concludes with the Electromaker of the Month winners for June 2024, including an ESP32-S3 power profiling tool, a polyphonic drum machine, and a BLE door/window alert system.
Elecia White and Christopher White discuss Elecia's upcoming third edition of 'Making Embedded Systems' and Christopher's contract work with Logical Elegance. They debate the design of a potential embedded.fm branded PCB, weighing the utility of a simple radio against the complexity of a full development board, and explore the ethical implications of using Large Language Models for creative and professional tasks. Christopher also provides an update on his progress assembling a QRP Labs QCX+ transceiver for amateur radio communication with his father.
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