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Circuit Cellar Magazine - February 2025

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In this issue

4: Introducing Bluetooth LE Audio - Part 1: Sound of a Revolution, By Nick Hunn 10: Learn Lisp Programming Using MCUs - Part 2: Extending µLisp with Custom Functions, By Raul Alvarez-Torrico 18: Reviving Frogger’s Retro Audio with a Programmable Sound Generator - Using an AY-3-8910 Chip and a Z80 Emulator on a Raspberry Pi, By Chris Cantrell 26: Basic Pulse Circuits - Part 3: Metastability, Setting, or Resetting, By Wolfgang Matthes 32: TECHNOLOGY FEATURE: Engineering Healthcare - Cutting-Edge Technologies to Enhance Patient Care, By Caleb Smith 38: DATASHEET: System-on-Module Technology Key IoT Enabler - High-Performance Computing Systems Packed into Compact Form Factors, By Tom Murphy 42: MODERN EMBEDDED INSIGHTS: CMake the Most of Software Development - Modern Build Systems Support Scalability, By Jacob Beningo 48: START TO FINISH: Switching Regulator Efficiency - Minimize Power Consumption in Battery-Operated Systems, By Stuart Ball 54: EMBEDDED IN THIN SLICES: Asynchronous Programming in Flutter - Shallow Dive into Google's Mobile App Framework, By Bob Japenga 62: TECH THE FUTURE: The Future of Development Boards - NXP MCX MCUs Cut Development Time - FRDM Platforms Revolutionize System Innovation, By Monica Cid

Introducing Bluetooth LE Audio - Part 1: Sound of a Revolution

Following the Bluetooth Core 5.2 release, Bluetooth Low Energy Audio introduces capabilities that will revolutionize audio applications through isochronous channels and new audio middleware. Nick writes about a framework supporting bidirectional audio and shared listening in Part 1 of a two-part article.

10+ mins

Learn Lisp Programming Using MCUs - Part 2: Extending µLisp with Custom Functions

In the second installment of this series, Raul delves into the world of µLisp and shows how to extend capabilities by adding custom functions such as \"pulsein\" and \"servo-create\", enabling developers to interface with ultrasonic sensors and control servomotors. In Part 1, Raul presented µLisp concepts and syntax, and extensions specific to MCUs.

10+ mins

Reviving Frogger's Retro Audio with a Programmable Sound Generator - Using an AY-3-8910 Chip and a Z80 Emulator on a Raspberry Pi

The Frogger arcade video game is considered one of the best of all time. Chris shares his journey to bring the nostalgic sounds of Frogger back to life using the classic AY-3-8910 sound chip and a modern Raspberry Pi setup with coding insights and a fix to the original game's music glitch.

10+ mins

Basic Pulse Circuits - Part 3: Metastability, Setting, or Resetting

In digital design, signal processing is crucial when dealing with asynchronous signals from sensors and level translators. In Part 1 of a three-part series, Wolfgang described how pulse circuits help digital circuits deal with pulse trains. In Part 2, he wrote about flip-flops, timing parameters and synchronization. In Part 3, he looks at how to mitigate metastability and ensure internal clock synchronization.

10+ mins

Engineering Healthcare - Cutting-Edge Technologies to Enhance Patient Care

Explore the groundbreaking advancements in Pulsed Field Ablation technology, where engineering meets cardiac care to revolutionize atrial fibrillation treatment. This article delves into the intricate design and functionality of cutting-edge devices that enhance precision and safety in medical procedures, showcasing the vital role electronics play in shaping the future of healthcare.

10+ mins

System-on-Module Technology Key IoT Enabler - High-Performance Computing Systems Packed into Compact Form Factors

System-on-Module (SoM) technology is gaining traction across various industries, driven by the demand for compact, integrated solutions that allow developers to add AI and connectivity options as demands evolve. Explore the factors fueling the SoM growth and the advantages these modules offer.

2 mins

CMake the Most of Software Development - Modern Build Systems Support Scalability

Discover how modernizing your build system with CMake can revolutionize embedded software development, offering unparalleled flexibility and efficiency. Dive into this article to explore the transformative benefits of CMake's cross-platform capabilities and how it integrates seamlessly with contemporary development practices.

9 mins

Switching Regulator Efficiency - Minimize Power Consumption in Battery-Operated Systems

A switching voltage regulator converts input DC voltage into a desired output DC voltage. This month, Stuart delves into the factors that influence the efficiency of switching regulators, and why they are crucial for embedded applications. From understanding the role of inductors and transistors to exploring practical examples, this article offers valuable knowledge for anyone interested in optimizing power supply designs.

10+ mins

Asynchronous Programming in Flutter - Shallow Dive into Google's Mobile App Framework

This month, Bob continues his look at mobile app programming from the perspective of an embedded system designer. He begins a shallow dive into Flutter, the mobile app framework from Google, by describing his transition from React Native to asynchronous programming in Flutter.

7 mins

Morse Micro Launches Highly Anticipated Second-Generation MM8108 SoC

Enabling improved spectrum efficiency to minimize interference in high-density environments, the MM8108 delivers class-leading data rates of up to 43.33Mbps using world-first sub-GHz 256-QAM modulation at an 8MHz bandwidth, making it ideal for a range of applications in agricultural, mining, industrial, home, and city environments.

1 mins

Infineon and Flex Showcase Zone Controller Design Platform for Software-Defined Vehicles

Infineon Technologies AG and Flex, a diversified global manufacturer and new preferred automotive design partner for Infineon, are showcasing the new Flex Modular Zone Controller design platform for software-defined vehicles at CES 2025.

1 mins

NXP MCX MCUs and IDEs Cut Development Time

Development boards, such as NXP's FRDM platform for MCX A series MCUs, are revolutionizing embedded systems by integrating components for prototyping and innovation in the IoT landscape. These technologies streamline development, enhance flexibility, and reduce costs, enabling greater focus on software development while addressing complex challenges.

6 mins

Read all Stories from Circuit Cellar

Circuit Cellar Magazine Description:

Publisher: KCK-Media-Corp.

Category: Education

Language: English

Frequency: Monthly

Circuit Cellar magazine features engineering tutorials, detailed microcontroller-based projects, and embedded systems industry news for professional electrical engineers, EE/ECE academics, and highly skilled electronics enthusiasts. Since 1988, Circuit Cellar has featured projects and tutorials from the world's top engineers on subjects such as embedded development (e.g., prototyping and programming), signal processing (e.g., DSP chips and signal conditioning), programmable logic (e.g., FPGA projects), sensor systems (e.g., smart sensors and MEMS), 'Net-connected devices (e.g., IoT projects and protocol stacks), robotics (e.g., robotic systems and proximity sensing), and much more. Circuit Cellar is the ultimate resource for all of your electrical engineering-related needs.