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Circuit Cellar Magazine - October 2025

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In this issue

4: Keeping Your Pi Safe - Part 1—Basic Encryption Functions with the TPM9670 Chip, By Gamal Labib 12: Synth Hero: Where Synth Legends Are Made - Creating a Retro Game Using a Raspberry Pi RP2040 MCU, By Chukwuemeka Adebi and Sergio Diaz 18: Mesh Networks - Reliable, Decentralized Communication Where Single Routers Fail, By Brian Chee 24: MQTT in the Real World - Migrating Legacy Protocols to MQTT, By Ignacio Siccardi 30: TECHNOLOGY FEATURE: Embedded AI - AI Comes to the Operational Network’s Edge, By Curtis Franklin 36: DATASHEET: MEMS Sensors - MEMS Chips Bring Programs and Action Together, By Curtis Franklin 40: MODERN EMBEDDED INSIGHTS: Automating Metrics in Modern Embedded Development, By Jacob Beningo 46: START TO FINISH: Audio Power Amplifiers - Choosing an Audio Amplifier for Your Design, By Stuart Ball 52: EMBEDDED IN THIN SLICES: Binary Fixed-Point Arithmetic - Extracting Signals from Noise and Other Distractions, By Bob Japenga 63: TECH THE FUTURE: The Future of Microsegmentation Cyber Defense - What Is OT Breach-Ready Cyber Defense? Microsegmentation Is Strategic Defense Against Intrusion Damage, By Agnidipta Sarkar

AI Coding Has Limits

Are you feeling the vibe? I’m not talking about the atmosphere down at the restaurant that’s too busy to take your reservation—I’m talking about the vibe that seems like it’s putting programmers out of business faster than a return to the abacus. Vibe Programming is a real thing; whether it’s a really good thing remains a very active question.

2 mins

Keeping Your Pi Safe

Part 1-Basic Encryption Functions with the TPM9670 Chip

8 mins

Synth Hero: Where Synth Legends Are Made

Creating a Retro Game Using a Raspberry Pi RP2040 MCU

10+ mins

Mesh Networks

Reliable, Decentralized Communication Where Single Routers Fail

8 mins

MQTT in the Real World

Migrating Legacy Protocols to MQTT

4 mins

Embedded AI

AI Comes to the Operational Network's Edge

10+ mins

Datasheet: MEMS Sensors

MEMS Chips Bring Programs and Action Together

8 mins

Automating Metrics in Modern Embedded Development

Complex modern embedded systems can be impossible to debug without serious metrics on performance, resource use, and error conditions. Collecting those metrics manually is laborious and error-prone. Jacob explores the metrics that matter and shows how collecting and delivering them can-and should-be automated.

7 mins

Audio Power Amplifiers

Choosing an Audio Amplifier for Your Design

9 mins

Binary Fixed-Point Arithmetic

Extracting Signals from Noise and Other Distractions

9 mins

XP Power Introduces Digital Programmable, Compact 1.5kW AC-DC Power Supplies

NXP Power has introduced the HPA1K5 Series. The HPA series of programmable, scalable, configurable AC-DC power supplies deliver 1.5kW of power from a universal single phase input with single outputs ranging from 24 to 60VDC.

1 mins

TDK Expands Ultra-Low Voltage TVS Diode Portfolio for High-Speed Consumer Interfaces

TDK Corporation has expanded its ultra-low clamping voltage TVS diode lineup with three new models in the SD0201 series, tailored for high-speed consumer electronics interfaces. These TVS diodes offer compact protection for USB Type-C, HDMI, DisplayPort, and Thunderbolt connections in smartphones, laptops, tablets, wearables, and networking devices.

1 mins

Infineon and Delta Collaborate on High-Density Power Modules to Accelerate Data Center Power Architecture

Infineon Technologies AG announced the strengthening of its existing collaboration with Delta Electronics, Inc., in the development of state-of-the-art high-density power modules capable of enabling vertical power delivery to AI processors in hyperscale data centers. Together, the companies are taking a next step to drive decarbonization and digitalization in AI data centers further.

2 mins

Renesas Introduces 64-bit RZ/G3E MPU for High-Performance HMI Systems Requiring AI Acceleration and Edge Computing

Renesas Electronics Corp., a premier supplier of advanced semiconductor solutions, announced the launch of its new 64-bit RZ/G3E microprocessor (MPU), a general-purpose device optimized for high-performance Human Machine Interface (HMI) applications. Combining a quad-core ARM Cortex-A55 running at up to 1.8GHz with a Neural Processing Unit (NPU), the RZ/G3E brings high-performance edge computing with AI inference for faster, more efficient local processing. With Full HD graphics support and high-speed connectivity, the MPU targets HMI systems for industrial and consumer segments including factory equipment, medical monitors, retail terminals, and building automation.

1 mins

New High-Voltage Programmable Resistor Modules from Pickering Provide a Simple Solution for Applications Requiring Voltage Handling up to 1.2kV

Pickering Interfaces, the leading supplier of modular signal switching and simulation solutions for use in electronic test and verification, has announced a new family of high voltage programmable resistor modules in a compact single-slot PXI and PXIe form factor, model 40-230 (PXI) and 42-230 (PXIe), providing a simple solution for applications requiring voltage handling up to 1.2kV. Part of Pickering's expanding range of programmable resistor modules, the new module is available in 70 standard builds, including four single-channel builds that offer a wide variety of resistance ranges and resolution capabilities, playing a pivotal role in simulating real-world resistive loads and fault conditions for high-voltage devices-under-test (DUTs) across automotive, aerospace, and energy sectors.

1 mins

The Future of Microsegmentation Cyber Defense What Is OT Breach-Ready Cyber Defense?

Microsegmentation Is Strategic Defense Against Intrusion Damage

4 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.