Circuit Cellar 425 December 2025 (PDF)

Issue #425
December 2025
Sensors 

04 Data Acquisition with the General Purpose Instrument Bus
Part 1: Design and Installation
By Tam Hanna

10 Embedded DSP with the RT1010 MCU
Part 1: Workflow and FIR Filters
By Raul Alvarez-Torrico

22 Designing Analog Electronics 
Part 2: Signal Conditioning with Op Amps
By Andrew Levido 

29 Encrypted MQTT Protocol for Critical Sectors
Mechanisms, Challenges, and Best Practices
By Ignacio Siccardi

32 TECHNOLOGY FEATURE
Sensors in the Spotlight
The Next Decade of Embedded Sensor Systems
By Curtis Franklin DATASHEET 

38 Small Size, Big Power
Smaller Microcontrollers Bring New Possibilities
By Curtis Franklin

42 Modern Embedded Insights Designing Embedded Software Architectures That Last
By Jacob Beningo

48 Start to Finish
Understanding MCU Timing
What Actually Happens Inside That Chip?
By Stuart Ball

54 Embedded in Thin Slices
Bob’s Wrap Up
By Bob Japenga 

TECH THE FUTURE
63 The Future of Sensors in Safety Systems
Sensing the Stop
How Magnetic Sensors Are Enabling the Next Generation of Braking Systems
By Karsten Köhler