June (issue #383) Circuit Cellar

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6: Build IoT Secure Apps with AWS Services: AWS IoT EduKit Overview, by Raul Alvarez-Torrico

REFERENCES
[1] Trust&GO Platform, https://www.microchip.com/en-us/products/security-ics/trust-platform/trust-and-go
[2] AWS IoT EduKit, https://edukit.workshop.aws/en/
[3] Using X.509 client certificates, https://docs.aws.amazon.com/iot/latest/developerguide/x509-client-certs.html#x509-client-cert-basics
[4] Retrieving the Device Certificate and Registering your AWS IoT thing, https://edukit.workshop.aws/en/blinky-hello-world/device-provisioning.html
[5] AWS IoT Device SDK for Embedded C, https://github.com/espressif/aws-iot-device-sdk-embedded-C/tree/61f25f34712b1513bf1cb94771620e9b2b001970
[6] AWS IoT Core Pricing, https://aws.amazon.com/iot-core/pricing/

RESOURCES
What is AWS IoT?
https://docs.aws.amazon.com/iot/latest/developerguide/what-is-aws-iot.html
Message Queueing Telemetry Transport (MQTT)
https://mqtt.org/
Introduction to MQTT
https://learn.sparkfun.com/tutorials/introduction-to-mqtt/all
AWS IoT Events developer guide
https://docs.aws.amazon.com/iotevents/latest/developerguide/what-is-iotevents.html
Light and Versatile Graphics Library
https://lvgl.io/
Core2 for AWS IoT EduKit BSP
https://edukit.workshop.aws/en/api-reference/index.html

14: A New Option for Renewable Backup Energy: For Solar Power and Batteries, By Nicholas Lockwood, Philip Shuck, Daniel Pedro, and Navin Francis

REFERENCES
[1] Camille Charluet & Wesley van Barlingen, “How long do electric car
batteries last?,” EVBox. https://blog.evbox.com/ev-battery-longevity.

[2] “SMPS transformer area of product,” Electrical Engineering Stack Exchange,
01-Jul-2020. https://electronics.stackexchange.com/questions/504101/smps-transformer-area-of-product

20: Asymmetric VR Game with Custom Microcontroller Peripherals: Collaborative Game, By Cameron Haire, Michaela Bettez, and Daniel Batan

RESOURCES
GitHub User Frank01001, “Unity – HL:A Gravity Gloves Basic Implementation”. https://github.com/Frank01001/Unity—HL-A-Gravity-Gloves-Basic-Implementation
Brackeys.How to make a video game—Getting started: https://www.youtube.com/channel/UCYbK_tjZ2OrIZFBvU6CCMiA
Valem, “STEAM VR – The Ultimate VR developer guide – PART 1”.
https://www.youtube.com/watch?v=5C6zr4Q5AlA&t=1042s
Valem, “STEAM VR – The Ultimate VR developer guide PART 2”.
https://www.youtube.com/watch?v=MKOc8J877tI&t=546s
Land, Bruce, and Sean Carroll. “Development Boards.” Cornell University ECE 4760, 2019, https://people.ece.cornell.edu/land/courses/ece4760/PIC32/target_board.html
Land, Bruce. “Adafruit TFT LCD Display Model 1480 and Keypad .” Cornell University ECE 4760, 25 July 2017, https://people.ece.cornell.edu/land/courses/ece4760/PIC32/index_TFT_display.html
Dunkels, Adam, and Oliver Schmidt. “Protothreads.” Protothreads – Lightweight, Stackless Threads in C, http://dunkels.com/adam/pt/
Land, Bruce. “ProtoThreads”. https://people.ece.cornell.edu/land/courses/ece4760/PIC32/index_Protothreads.html
Land, Bruce. “Time Measurement and Control plus Clock Generation”. https://people.ece.cornell.edu/land/courses/ece4760/PIC32/index_Timers.html

ASSETS
“Big Elevator Going Up”, finalCrystine. licensed under CCBYNC 3.0. https://freesound.org/people/finalCrystine/sounds/176037/
“Elevator Door Opens and Closes”, NachtmahrTV. licensed under CCBYNC 3.0. https://freesound.org/people/NachtmahrTV/sounds/556699/
“Dark loops 204 piano short loop 60 bpm”, josefpres. licensed under CCBYNC 3.0. https://freesound.org/people/josefpres/sounds/570791/
“Lightmapping code for prefabs in Unity”, Alejandr Castedo. licensed under the Intel Sample Source Code License Agreement. https://software.intel.com/content/www/us/en/develop/articles/code-sample-lightmapping-code-for-prefabs-in-unity.html

Code and Supporting Files

28: Build a Wattmeter/PowerGrid Analyzer, By Vincent Thiernesse

RESOURCES
Go Tronic | www.gotronic.fr
Mouser Electronics | www.mouser.com
Microchip Technology | www.microchip.com
MUSELEC | www.muselec.fr

Code and Supporting Files

37: Low Distortion Voltage Controlled Floating Resistor, by Dimitri Danyuk

REFERENCES
[1] “H11F1M, H11F2M, H11F3M Photo FET Optocouplers,” Datasheet, ON Semiconductors, May 2012.
[2] “JFETs as Voltage-Controlled Resistors,” Application Note AN105, Siliconix, 1997,
www.linearsystems.com/lsdata/others/AN105FETs.pdf.
[3] P. Horowitz and W. Hill, Art of Electronics, Cambridge University Press; Third Edition, 2015; Chapter 3.2.7: “FETs as Variable Resistors,” pp.161-163.
[4] M. Chibana, ”Variable Resistor Device Using a Field Transistor,” US. Patent 3715675
[5] G. Kleinschmidt, “An Audio T.H.D. Analyzer,” oscillator schematic can be found at www.diyaudio.com/forums/group-buys/221670-sv-oscillator-pcb-buy.html
or www.eevblog.com/forum/buysellwanted/who-would-like-an-ultra-low-distortion-audio-oscillator-pcb/25/Glen
[6] A. C. Barber, “Linearization of Voltage-Controlled Amplifier Using MOSFET Gain Control Circuit,” US Patent 5808516
[7] R. Quan, “A Guide to using FETs for Voltage-Controlled circuits,” Parts 1-5, EDN, 2017, October 13, 2017; January 2, 2018; February 6, 2018; and April 10, 2018; and July 3, 2018.
[8] T. L. Clarke, “FET Pair and Op Amp Linearize Voltage-Controlled Resistor,” Electronics, April 28, 1977; pp. 111-112.
[9] “HCNR200 and HCNR201 High-Linearity Analog Optocouplers,” Datasheet, Avago Technologies, July 1, 2014.

43: Technologies for Digital Signage: Realistic Representation with Digital Signage, By Al Mahmud Al Mamun

54: DATASHEET: AC-DC Power Supplies: Convert power AC to DC, By Al Mahmud Al Mamun

XP Power www.xppower.com/product/ASB75-Series
CUI www.cui.com/product/internal-ac-dc-power-supplies/chassis-mount/vgs-100w-series
CALEX https://calex.com/chassis-mount-converters/600w-ihc-ac-dc-power-supply
MEAN WALL www.meanwell-web.com/en-gb/meanwell-uhp-2500
N2POWER www.n2power.com/product-lineup/xl750-750-watt-ac-dc
RECON https://recom-power.com/en/rec-s-RACM40-K.html
Targus https://ap.targus.com/products/65w-usb-c-ac-adapter
TRACO POWER www.tracopower.com/int/series/tib-ex
TT Electronics www.ttelectronics.com/TTElectronics/media/ProductFiles/Datasheets/TAAM700.pdf

58: START TO FINISH: Getting Started – Capacitors, By Stuart Ball

REFERENCES
[1] TDK aluminum electrolytic capacitors:
https://www.tdk-electronics.tdk.com/download/530704/6ad5ed9e1ff4f727c328cb92da2adf2b/pdf-generaltechnicalinformation.pdf
[2] AVX tantalum capacitors:
https://www.avx.com/docs/techinfo/Tantalum-NiobiumCapacitors/Tantalum-Capacitors-Characteristics-and-Component.pdf

64: EMBEDDED IN THIN SLICES: Debugging Embedded Real-Time Systems (Part 2): Bugs of Time, By Bob Japenga

REFERENCES
[1] The great Northeastern US power blackout of 2003:
https://www.ieso.ca/corporate-ieso/media/also-of-interest/blackout-2003
[2] What really happened on the 1997 Mars Pathfinder mission:
http://www.cs.cornell.edu/courses/cs614/1999sp/papers/pathfinder.html
[3] The monkey and the coconut trap:
https://www.theguardian.com/lifeandstyle/2014/nov/14/how-to-avoid-monkey-trap-oliver-burkeman

69: FROM THE BENCH: Small Signal Sampling: In a Heartbeat, By Jeff Bachiochi

REFERENCES
[1] Heart anatomy
https://www.texasheart.org/heart-health/heart-information-center/topics/heart-anatomy/
[2] Normal 12-Lead Electrocardiogram. https://commons.wikimedia.org/w/index.php?curid=77817932
[3] Analog Devices
Single-Lead, Heart Rate Monitor Front End – AD8232 Data Sheet
www.analog.com/media/en/technical-documentation/data-sheets/ad8232.pdf
[4] Heart Sounds and the Cardiac Cycle (Figure 19.3.3)
https://open.oregonstate.education/aandp/chapter/19-3-cardiac-cycle/
[5] Examples of cardiac arrhythmias.
https://www.healthline.com/health/arrhythmia#types
[6] Interactive Cardiovascular Library: Arrhythmias
https://watchlearnlive.heart.org/index.php?moduleSelect=arrhyt

Code and Supporting Files

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June (issue #383) Circuit Cellar