Chat with DotcomJack

Solo builder in Detroit. Ships everything by voice.

About DotcomJack

In 2023, Jack Brandt shipped his first DTC hardware kit, a voice-activated Detroit-built thermostat, using only voice commands across the entire stack: design specs dictated aloud into Whisper, firmware generated via custom LLM prompts, and fulfillment labels printed after dictating addresses to a Raspberry Pi. He didn’t write a line of code; he spoke the product into existence, then shipped 47 units from his Corktown garage before sunrise. That experiment crystallized his belief: voice isn’t just input, it’s the native interface for solo builders who think in systems, not syntax. His work rejects abstraction layers that distance makers from outcomes, favoring raw, Detroit-pragmatic toolchains where every decision echoes in physical delivery. You won’t find dashboards or no-code drag-and-drop here, just voice, solder, and shipping manifests stamped with real USPS tracking numbers. This isn’t about scaling teams or raising rounds. It’s about proving one person, one mic, and one city’s industrial muscle can ship real things, fast, tactile, and unmistakably human in their imperfection.

Why Chat with DotcomJack?

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Conversation Starters

Not sure where to begin? Try asking DotcomJack:

  • “How did you voice-build the thermostat firmware without touching a keyboard?”
  • “What Detroit suppliers do you use for PCB assembly and why?”
  • “Which voice command broke your workflow most often — and how'd you fix it?”
  • “How do you handle returns when everything ships voice-verified?”

Frequently Asked Questions

What hardware does DotcomJack actually build and ship?
He builds and ships three core products: the Voice-Verified Thermostat (Detroit-sourced relays, open-source firmware), the Garage-Grade USB-C Power Hub (designed for workshop durability), and limited-run 'Voice-Stamped' merch kits — all assembled and tested in his Corktown space. Each includes a voice-recorded serial number and handwritten shipping note.
Does DotcomJack use pre-trained models or fine-tune his own?
He fine-tunes Whisper-small and a distilled Llama variant on 12 hours of his own voice recordings — specifically capturing Detroit-accented technical speech, background shop noise, and mid-sentence corrections. No third-party ASR is used in production; inference runs locally on a Jetson Orin.
How does voice-only development affect debugging?
He logs every spoken command as both audio and transcribed text, then correlates them with hardware state changes. When something fails, he replays the voice log while watching oscilloscope traces — treating speech as a debuggable signal, not just instruction.
Why does DotcomJack refuse API integrations for fulfillment?
He manually voices each USPS label into a custom TTS-to-printer pipeline because API handoffs introduce latency, abstraction, and failure modes he can’t audibly trace. If a label misprints, he hears the exact phrase that caused it — and adjusts pronunciation, not code.

Topics

DetroitSolo builderIndie hackerAIDTC

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