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Circuit Cellar Magazine - September 2025

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In this issue

4: Sensors in the Soil - A Compact Solar-Powered Soil Monitoring System for Smart Farming, By Maheshwaran Sadasivam and Vairamani Kanagavel 13: Control Your Local IoT Network from the Cloud - Secrets of “Cloud Relaying” Revealed, By Gamal Labib 18: Build a Follower Counter for Social Media - See Real-Time Metrics Using an Arduino Yún, By Andrei Florian 28: Chaos on Your Desktop - Build a Color-Pulsing Light Sphere Using a PIC or Raspberry Pi Pico MCU, By Dev Gualtieri 32: Audio AI on the Edge: A Primer for Device Makers - AI Has Changed Audio, But Not Audio Hardware (Yet), By Music.AI 34: TECHNOLOGY FEATURE: Autonomous Mobile Robots - Robots Moving to Their Own Beat, By Curtis Franklin 40: DATASHEET: MCUs with Built-In Security - Compact Computing without a Security Penalty, By Curtis Franklin 44: PICKING UP MIXED SIGNALS: The DVM on Your Wrist - A Wireless Link Between a DVM and a Smart Watch, By Brian Millier 52: EMBEDDED SYSTEM ESSENTIALS: EMFI-Triggered Software Faults - Can They Drive a Car Crazy?, By Colin O'Flynn 63: TECH THE FUTURE: The Future of Wide-Area Communications - Flexible Platforms in the Sky - Stratospheric Drones Could Change How We Connect, By Hamed Khalkhali, PhD

Sensors in the Soil

A Compact Solar-Powered Soil Monitoring System for Smart Farming

10+ mins

Control Your Local IoT Network from the Cloud

Secrets of “Cloud Relaying” Revealed

5 mins

Build a Follower Counter for Social Media

See Real-Time Metrics Using an Arduino Yún

10+ mins

Chaos on Your Desktop

Build a Color-Pulsing Light Sphere Using a PIC or Raspberry Pi Pico MCU

9 mins

Audio AI on the Edge: A Primer for Device Makers

AI Has Changed Audio, But Not Audio Hardware (Yet)

3 mins

Autonomous Mobile Robots

Robots Moving to Their Own Beat

10+ mins

Datasheet: MCUs with Built-In Security

Compact Computing without a Security Penalty

2 mins

The DVM on Your Wrist

A Wireless Link Between A DVM and a Smart Watch

10+ mins

EMFI-Triggered Software Faults

Can They Drive a Car Crazy?

10+ mins

Harwin Brings Through-Hole Retention to Industrial Kontrol Range of Connectors

Harwin has extended its Kontrol lineup of connectors for industrial and embedded applications, adding through-hole retention to further enhance resilience and board-level reliability in harsh operational environments. Harwin has added 72 new products to the industrial connector family, extending the range by 48%.

1 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.

1 mins

Nordic Semiconductor Announces Highly Integrated nPM3104 Power Management IC With Support For Small-Size Battery Products

Nordic Semiconductor announced the new nPM1304 Power Management IC (PMIC). Building on the success formula of the well-established nPM1300, the nPM1304 offers the ideal solution for space-constrained applications that require small batteries.

2 mins

Bourns Announces New Micro Encoders Offering High Reliability in a Compact Design

Bourns, Inc., a leading manufacturer and supplier of electronic components for power, protection, and sensing solutions, announced its PEC04 Series 4mm Incremental Micro Encoder, its PEC05 Series 5mm Incremental Micro Encoder and its Model PEC06, a 6mm Incremental Micro Encoder. Bourns new micro encoders provide position and speed information essential for control functions in a broad variety of electronic applications.

1 mins

NXP’s New Battery Cell Control IC Family Advances New Energy Solutions

NXP Semiconductors announced its new 18-channel Li-ion battery cell controller, the BMx7318/7518 IC family, designed for electric vehicle (EV) high-voltage battery management systems (HVBMS), industrial energy storage systems (ESS) and 48V battery management systems.

1 mins

Silanna Launches Plural ADC EVKS to Take on the Overpriced, Sole-Source Norm

Silanna Semiconductor will release its first Evaluation Kits (EVKs) for the Plural data converter family. Available now, these offer the fastest, most cost-effective way to evaluate and deploy high-performance ADCs.

1 mins

The Future of Wide-Area Communications Flexible Platforms in the Sky

Flexible Platforms in the Sky Stratospheric Drones Could Change How We Connect

5 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.