Article Materials and Resources

August (issue #349) Circuit Cellar

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p.6: Automating the Art of Toast: With a Side of Raspberry Pi, By Katie Bradford and Michael Xiao

[1] A small, portable computer. Specifically the Raspberry Pi Zero W, a wireless enabled computer with the smallest form factor for Pis yet, was used in this project

[2] Using the small PIC32 breakout board provided by ECE4760 course, found here

[3] Supported by CECOMINOD012186 motor driver boards, complete with voltage regulation and headers.  Qunqi part number MK-050-2.

Additional Information


Video 1:

Video 2:

Adafruit |
Microchip Technology |
Raspberry Pi |
Sparkfun |
STMicroelectronics |


p.12: Build an RGB LED Controller: Using Parallel FET Dimming, By Dirceu R. Rodrigues, Jr.

Component List


R1, R10, R12, R14 = 10 kΩ

R2, R3, R4, R5, R6, R7, R8 = 390 Ω

R9, R11, R13 = 51 Ω

R15, R19, R20, R21 = 39 kΩ

R16 = 47 Ω

R17 = 4.7 kΩ

R18 = 2.2 kΩ

R22 = 0.33 Ω (Rs)


C1, C3 = 0.1 µF

C2 = 0.33  µF

C4 = 47 µF

C5 = 1 µF


L1 = 180 µH (Pulse P0465)


REG1 =  LT7805CV linear regulator

U1 =  ATmega8 microcontroller (my MYK2 module)

U2 =  ZXLD1350 350 mA LED driver

IR1 = AX-1838HS IR receiver

D1 = ZLSS1000 diode

DI1 = Seven segment display

LED1, LED2, LED3 = Power RGB LED 350 mA/3 W

Q1 = BC848 NPN Transistor

M1, M2, M3 = IRF7317 double power MOSFET


Y1 = Crystal 16 MHz

J1 = Power jack

S1 = SPST slide switch

S2 = Push button

Diodes |
Microchip Technology |
MCS Electronics |


p. 20: Building a Twitter Emote Robot: Reactions in Real Time, By Ian Kranz, Nikhil Dhawan and Sofya Calvin

[1]  Primack, Brian A et al. “Social Media Use and Perceived Social Isolation Among Young Adults in the U.S” American journal of preventive medicine vol. 53,1 (2017): 1-8.
[2] 18-bit color TFT
Adafruit Inc. |
[3] Twitter Python Library
Tweepy |
[4] Emotion Analyzer
ParallelDots |
[5] Bluetooth HC-05
DSD Tech |
[6] Pic32 PCB
Sean Carroll |
[7] Peripheral Device Library
Bruce Land |
[8] Modified Protothreads Library
Syed Tahmid Mahbub |


Adafruit |
DSD Tech |
MathWorks |
Microchip Technology |
ON Semiconductor |
ParallelDots |


Watch the video of the TweetBot project here:


p. 26: Understanding the Role of Inference Engines in AI: Benchmarks and Batching, By Geoff Tate

[1] Artificial Intelligence

Flex Logix Technologies |


p.30: Portable Digital Synthesizer: Music Using an MCU, By T.J. Hurd and Ben Roberge


Adafruit |
Autodesk |
Microchip Technology |
Monoprice |

Watch the video of the Portable Digital Synthesizer project here:



p.38: IC Solutions Rev Up for Next Gen Auto Designs: MCUs, Analog ICs and More, By Jeff Child

p.45: Display Solutions Enhance Embedded Designs: System-Level Functionality, By Jeff Child

p.48: PRODUCT FOCUS: Tiny Embedded Boards: Petite Processing, by Jeff Child

p.52: EMBEDDED IN THIN SLICES: Bluetooth Mesh (Part 4): Models and Re-Use, By Bob Japenga

[1] For Licensing rights
[2] Created by Bob Japenga
[3] Created by Bob Japenga

p.58: THE DARKER SIDE: The Fundamentals of Fuseology: Purposeful Protection, By Robert Lacoste

[1]  Fuses
[2] IEC60269
Low-voltage power fuses
[3] Fuseology

IEC 60127-2:2014
Miniature fuses – Part 2: Cartridge fuse-links

Fuse Technology

Fuse glass 2 A 250 VAC 5 x 20 mm
Littelfuse ref 0218002.HXP

Keysight |
Littelfuse |
TDK-Lambda |

p.64: FROM THE BENCH: Watt’s Up with LEDs?: Efficiency Put to the Test, By Jeff Bachiochi

[1]  Luxeon heatsink calculator.

‘Light Meter’ by Doggo Apps or ‘Lux Meter’ by My Mobile Tools Dev

3 W High-Power LEDs



Addicore |
On Semiconductor |
Texas Instruments |

p.72: THE CONSUMMATE ENGINEER: Energy Monitoring (Part 3): Natural Gas and More, By George Novacek


  1. George Novacek, Humidity Sensors, Circuit Cellar Issue 339
  2. Silicon Labs Si7006-A20
  3. Adafruit Industries
  4. Universal Solder
  5. SparkFun Electronics
  6. Circuit Cellar #288 WWVB Clock Revisited by George Novacek


p.79: The Future of IoT Standards: Unlock IoT: What’s West of Westeros?, By Cees Links

[1] Golden Mousetrap Lifetime Achievement Award
[2] Wi-Fi NOW Hall of Fame.

Qorvo |


Article Materials for Circuit Cellar Magazine Issue 349 • August 2019 — Get a PDF of the Issue.

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August (issue #349) Circuit Cellar

by Circuit Cellar Staff time to read: 4 min