Circuit Cellar 427 February 2026 (PDF)

Issue #427
February 2026
Home Control

4 Wearable LiDAR Spatial Audio Navigator for Visually-Impaired Individuals
Built with a Raspberry Pi Pico, a TF-Luna LiDAR Sensor, and a Hand-Held Potentiometer
By Arnav Shah, Anishka Raina, and Yoon Kang

12 Robot Operating System 2 (ROS 2)
Core Concepts, Architecture, and Real-World Capabilities
By Pedro Bertoleti

18 Embedded DSP with the RT1010 MCU
Part 2: Delay, Flanger, IIR, and Overdrive
By Raul Alvarez-Torrico

28 Data Acquisition with the General Purpose Instrument Bus
Part 2: Visual Display of Multimeter Data with ScottPlot
By Tam Hanna

34 TECHNOLOGY FEATURE
Connected Home Control
Matter: The New Foundation of the Connected Home
By Curtis Franklin

40 DATASHEET
Power on the Bench
Multi-Output Power Supplies
By Curtis Franklin

44 The Sensor Edge
Sensors: From Canned Tuna to Caviar
By Brian Chee

50 Modern Embedded Insights
ADRs: The Missing Memory in Embedded Projects
By Jacob Beningo

54 Start to Finish
MCU Debugging with JTAG
Using JTAG to Peek Inside Your MCU
By Stuart Ball

63 TECH THE FUTURE 
The Future of Airborne Systems
Airborne Embedded Software
Simplifying Safety and Security By Jay Thomas