Article Materials and Resources

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

[1] Trust&GO Platform,
[2] AWS IoT EduKit,
[3] Using X.509 client certificates,
[4] Retrieving the Device Certificate and Registering your AWS IoT thing,
[5] AWS IoT Device SDK for Embedded C,
[6] AWS IoT Core Pricing,

What is AWS IoT?
Message Queueing Telemetry Transport (MQTT)
Introduction to MQTT
AWS IoT Events developer guide
Light and Versatile Graphics Library
Core2 for AWS IoT EduKit BSP

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

[1] Camille Charluet & Wesley van Barlingen, “How long do electric car
batteries last?,” EVBox.

[2] “SMPS transformer area of product,” Electrical Engineering Stack Exchange,

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

GitHub User Frank01001, “Unity – HL:A Gravity Gloves Basic Implementation”.—HL-A-Gravity-Gloves-Basic-Implementation
Brackeys.How to make a video game—Getting started:
Valem, “STEAM VR – The Ultimate VR developer guide – PART 1”.
Valem, “STEAM VR – The Ultimate VR developer guide PART 2”.
Land, Bruce, and Sean Carroll. “Development Boards.” Cornell University ECE 4760, 2019,
Land, Bruce. “Adafruit TFT LCD Display Model 1480 and Keypad .” Cornell University ECE 4760, 25 July 2017,
Dunkels, Adam, and Oliver Schmidt. “Protothreads.” Protothreads – Lightweight, Stackless Threads in C,
Land, Bruce. “ProtoThreads”.
Land, Bruce. “Time Measurement and Control plus Clock Generation”.

“Big Elevator Going Up”, finalCrystine. licensed under CCBYNC 3.0.
“Elevator Door Opens and Closes”, NachtmahrTV. licensed under CCBYNC 3.0.
“Dark loops 204 piano short loop 60 bpm”, josefpres. licensed under CCBYNC 3.0.
“Lightmapping code for prefabs in Unity”, Alejandr Castedo. licensed under the Intel Sample Source Code License Agreement.

Code and Supporting Files

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

Go Tronic |
Mouser Electronics |
Microchip Technology |

Code and Supporting Files

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

[1] “H11F1M, H11F2M, H11F3M Photo FET Optocouplers,” Datasheet, ON Semiconductors, May 2012.
[2] “JFETs as Voltage-Controlled Resistors,” Application Note AN105, Siliconix, 1997,
[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
[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

Allsee Technologies |
Clevertouch |
Impact Digital Signage |
Intelli-Signage |
LG |
Nixplay |
Planar |
Skylight Frame |
WolfBox |

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

XP Power
TT Electronics

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

[1] TDK aluminum electrolytic capacitors:
[2] AVX tantalum capacitors:

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

[1] The great Northeastern US power blackout of 2003:
[2] What really happened on the 1997 Mars Pathfinder mission:
[3] The monkey and the coconut trap:

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

[1] Heart anatomy
[2] Normal 12-Lead Electrocardiogram.
[3] Analog Devices
Single-Lead, Heart Rate Monitor Front End – AD8232 Data Sheet
[4] Heart Sounds and the Cardiac Cycle (Figure 19.3.3)
[5] Examples of cardiac arrhythmias.
[6] Interactive Cardiovascular Library: Arrhythmias

Code and Supporting Files

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June (issue #383) Circuit Cellar

by Circuit Cellar Staff time to read: 4 min