An Interview with Zach Fredin

The Amp Hour · 6 Jan 2017 · 1h 49m · Episode 330

What this episode covers

Zach Fredin of NeuroTinker explains how he and partner Joe Berto built NeuroBytes, open-source electronic neuron simulators using ATtiny44A and ATtiny88 microcontrollers, to teach neuroscience in high schools and colleges. They secured an NSF SBIR grant by demonstrating commercial viability through pilot runs with Keytronic EMS, navigating strict R&D spending rules and component shortages like the doubling price of Atmel chips. The team is now developing curriculum and preparing for Phase 2 funding while managing manufacturing challenges with JST connectors and firmware optimization on STM32 platforms.

Mentioned

Companies
NeuroTinker, Keytronic EMS, National Science Foundation, Boston College, Boston Dynamics, Little Bits, Adafruit, SparkFun, Seeed Studio
Products
NeuroBytes
Chips
ATtiny44A, ATtiny88, STM32F0, FLIR Lepton, ESP32
Also
JST, Hackaday, SketchUp, DigiKey

Other shows on the same ground, closest first.

  • Embedded.fm · 48m

    44: Light Up Strikes Back

    Josh Chan and Tarun Pondicherry, founders of Lightup, discuss the journey of their electronics education kit from a Kickstarter campaign to shipping the MiniKit. They detail technical hurdles including PCB redesigns due to battery supplier changes and supply chain delays for the Mel 32 U4 microcontroller. The founders also explain their strategy for securing retail partnerships with Makershed and their plans to expand the product line with microcontroller blocks for programming education.

  • Embedded.fm · 54m

    372: The Motivation of Creativity

    Anne Barela, a retired U.S. Foreign Service security engineer and consulting engineer at Adafruit, discusses her journey from Caltech and government service to the maker community. She explains how affordable dev boards like the Adafruit Trinket and Circuit Playground Express, along with libraries for CircuitPython and Arduino, lowered the barrier to entry for embedded electronics. Barela also shares insights on writing accessible tutorials, the impact of global chip shortages on hobbyists versus enterprise manufacturers, and the potential for open-source hardware in developing regions.

  • Embedded.fm · 1h 07m

    90: Stick It in a Pumpkin

    Todd Kurt, co-founder of ThingM, discusses the evolution of his company's smart LED products, specifically the I2C-based BlinkM and the USB-based Blink(1). He explains the technical trade-offs between using ATtiny microcontrollers for I2C communication and Microchip PIC processors for native USB support, highlighting the firmware and timing challenges with WS2812 (NeoPixel) and APA102 (DotStar) LEDs. Kurt details the business strategy behind using Kickstarter for market validation and PR, while recounting specific manufacturing pain points in China, including firmware bugs, PCB layout issues, and CNC machining errors. He also touches on the complexities of managing a small hardware team, dealing with software contractors, and exploring future wireless product directions.

  • Embedded.fm · 1h 05m

    359: You Can Never Have Too Many Socks (Repeat)

    Thea Flowers, founder of Winterbloom, discusses her open-source hardware synthesizer modules, including Castor & Pollux and Big Honking Button, which utilize the SAMD21 microcontroller and CircuitPython. She explains the hybrid analog-digital design of Castor & Pollux, which emulates the Roland Juno 106 voice, and details her transition from software engineering to hardware manufacturing. Flowers highlights the challenges of scaling production, such as the difficulty of assembling the Sol module, and her strategy of using contract manufacturers while maintaining open-source transparency to build a profitable small business.

  • Embedded.fm · 1h 01m

    388: Brains Generate EMF

    Alan Cohen, author of 'Prototype to Product' and medical device consultant, discusses the development of VolksEEG, an open-source electroencephalogram (EEG) designed for research and eventual clinical use. He details the hardware architecture, including the Texas Instruments ADS1299 chip and the Adafruit Feather nRF52840 Sense, and explains the regulatory strategy of targeting an Institutional Review Board (IRB) clearance before pursuing FDA certification. Cohen also addresses the challenges of open-source licensing, supply chain shortages, and the specific engineering constraints of building safe, low-amplitude signal acquisition systems.

The summary, chapters and topics are generated from the episode’s audio by this directory, not written by The Amp Hour. The episode itself belongs to its publisher.