March (issue #416) Circuit Cellar

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4: Accelerating AI – Handwritten Digit Recognition with FPGA-Powered CNNs, By Jichao Yang and Yiyang Zhao

REFERENCES
[1] Cyclone V Hard Processor System Technical Reference Manual https://www.intel.com/content/www/us/en/docs/programmable/683126/21-2/introduction-to-the-hard-processor-system-98309.html

[2] The Videos linked here show the result of our project:

RESOURCES
Altera | www.altera.com
Intel | www.intel.com

Code and Supporting Files

10: Learn Lisp Programming Using MCUs – Part 3—Forward Kinematics in µLisp, By Raul Alvarez-Torrico

REFERENCES
[1] Raul Torrico, “Lean Lisp Programming Using MCUs. Part 2, Extending µLisp with Custom Functions.” Circuit Cellar 415, February, 2025.
[2] Raul Torrico, “ Learn to Program MCUs with µLisp. Crash Course Offers Insight into Pioneering Language.” Circuit Cellar 411, October, 2024.
[3] Language reference, http://www.µLisp.com/show?3L
[4] Arrays, http://www.µLisp.com/show?3AHM
[5] MatrixMath, https://www.arduino.cc/reference/en/libraries/matrixmath/

SOURCES
Wio Terminal – https://www.seeedstudio.com/Wio-Terminal-p-4509.html
LilyPad LED – https://www.sparkfun.com/products/13902
Assembled Pi T-Cobbler Plus – GPIO Breakout – https://www.adafruit.com/product/2028
Joystick Module – https://www.amazon.com/WWZMDiB-Dual-Axis-Joystick-Raspberry-PlayStation-2/dp/B0BX6CW5SP/

RESOURCES
Raul Torrico. Build a 4-DOF Robotic Arm (Part 1)
https://circuitcellar.com/research-design-hub/build-a-4-dof-robotic-arm-part-1/

Raul Torrico. Build a 4-DOF Robotic Arm (Part 2)
https://circuitcellar.com/research-design-hub/build-a-4-dof-robotic-arm-part-2/

Forward Kinematics
https://opentextbooks.clemson.edu/wangrobotics/chapter/forward-kinematics/

18: Introducing Bluetooth LE Audio – Part 2—Learning the Intricacies of these New Specifications, By Nick Hunn

Bluetooth SIG | www.bluetooth.com

24: Create an AI-Driven Smart Home Security System – Part 1— Setup and First Steps of the Raspberry Pi AI Kit, By Dhairya Parikh

REFERENCES
[1] Raspberry Pi 5 Product Page: https://www.raspberrypi.com/products/raspberry-pi-5/
[2] Initial Setup Step 1: Bootloader Update Guide: https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#update-the-bootloader-configuration
[3] Initial Setup Step 2: Raspberry Pi AI Kit Installation Guide: https://www.raspberrypi.com/documentation/accessories/ai-kit.html#ai-kit-installation
[4] Running Your First AI Model: GitHub Repository—hailo-rpi5-examples:
https://github.com/hailo-ai/hailo-rpi5-examples
Pi Camera Options:
https://raspi.tv/2016/new-and-old-raspberry-pi-camera-comparison-shots-1-3-2-1-noir

RESOURCES
Raspberry Pi Foundation | www.raspberrypi.org
Hailo | www.hailo.ai

30: TECHNOLOGY FEATURE: Industrial Automation – Revolutionizing Production with Innovation, By Caleb Smith

36: DATASHEET: DSPs and DSCs – Smarter Algorithms and Beyond, By Caleb Smith

Datasheet URLs:
Analog Devices: https://www.analog.com/media/en/technical-documentation/data-sheets/ADSP-21992.pdf
Asahi Kasei Microdevices: https://www.akm.com/content/dam/documents/products/audio-voice-processor/ak7709vq/ak7709vq-en-datasheet.pdf
Marvell: https://www.marvell.com/content/dam/marvell/en/public-collateral/dsp/marvell-aquila-coherent-lite-dsp-product-brief.pdf
Microchip: https://ww1.microchip.com/downloads/aemDocuments/documents/MCU16/ProductDocuments/DataSheets/dsPIC33AK128MC106-Family-Data-Sheet-DS70005539.pdf
MaxLinear: https://www.maxlinear.com/products/infrastructure/wired-infrastructure/data-center-connectivity/pam4-dsps
NXP Semiconductors: https://www.nxp.com/products/SAF9100
Onsemi: https://www.onsemi.com/download/data-sheet/pdf/e8310-d.pdf
Texas Instruments: https://www.ti.com/lit/gpn/AM2754-Q1
XMOS: https://www.xmos.com/documentation/XM-014034-PC/html/rst/XU316-1024-QF60A.html

40: PICKING UP MIXED SIGNALS: An Air Quality Monitor with a Blues Satellite Link Module, By Brian Millier

Code and Supporting Files

52: EMBEDDED SYSTEM ESSENTIALS: Exploring the RP2350 Security Raspberry Pi’s Novel “Security through Transparency” Approach, By Colin O’Flynn

REFERENCES
[1] RP2350 Boot Rom Source Code: https://github.com/raspberrypi/pico-bootrom-rp2350
[2] Colin Flynn, “Embedded System Essentials: Recreating Code Protection Bypass—An LPC MCU Attack.” Circuit Cellar #338, September, 2018.
[3] RP2350 Target Board Design Files: https://github.com/newaetech/chipwhisperer-target-cw308t/tree/main/CW312T_RP2350
[4] Colin O’Flynn. “Embedded System Essentials. Broad Market Secure MCUs: Spotlight on the MAX32520.” Circuit Cellar #358, May, 2020.
[5] RP2350 Hacking Challenge: https://github.com/raspberrypi/rp2350_hacking_challenge
[6] RP2350 Challenge Results: https://www.raspberrypi.com/news/security-through-transparency-rp2350-hacking-challenge-results-are-in/

62: TECH THE FUTURE: The Future of Voice-Enabled AI Industry Advancements in MEMS Microphones for Voice AI – Acoustic Activity Detection and High Acoustic Overload Point Transform Voice Interaction, By Uday Mudoi

REFERENCES
[1] TDK InvenSense T5838 and T5848: https://invensense.tdk.com/smartsound/

RESOURCES
TDK | www.invensense.tdk.com

Additional Resources:
https://invensense.tdk.com/news-media/ces2023pr_smartsound/
https://invensense.tdk.com/news-media/tdk-low-power-t5838-mems-microphones-edge-ai-applications/

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Circuit Cellar Staff

Website | + posts

Circuit Cellar's editorial team comprises professional engineers, technical editors, and digital media specialists. You can reach the Editorial Department at editorial@circuitcellar.com, @circuitcellar, and facebook.com/circuitcellar

Caleb Smith

Editor-in-Chief at Circuit Cellar | + posts

Caleb Smith is a passionate technology enthusiast who joined the Circuit Cellar team as Editor-in-Chief in 2025, where he brings a fresh perspective to the world of embedded electronics. His academic journey began in mechanical engineering, where he developed a strong foundation in problem-solving and innovation. He later pursued studies in emergency medicine to fulfill his desire to help others, honing his analytical skills and ability to think on his feet.

Caleb has explored various facets of technology, including robotics and language development, allowing him to blend creativity with technical knowledge. His writing reflects a deep curiosity and an eagerness to engage with the latest advancements in the field.

When he’s not immersed in the latest tech trends, Caleb enjoys traveling to new destinations and indulging his passion for film as a self-proclaimed cinephile. His diverse interests and unique background fuel his commitment to making Circuit Cellar a leading voice in the industry.

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March (issue #416) Circuit Cellar