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JC
Jot V1, 9 Oct

Featured build

JC-P01, personal project

Jot

A handheld push-to-talk voice-note device. Press, speak, release. Jot streams what you said over Bluetooth Low Energy to an iPhone app, which transcribes it and files it as a note, a reminder, or a calendar event. Custom PCB, 3D-printed case, and a first complete unit targeted for 9 October 2026.

Part: Jot V1Spec
MCU
Seeed XIAO nRF52840 Sense
Link
Bluetooth Low Energy
Host
iPhone app
Output
Notes, reminders, calendar events
PCB
Custom, fab by JLCPCB
Enclosure
3D printed
V1 target
9 Oct 2026

System flow

  1. 01

    Press

    Hold the button and speak. Release to finish the note.

  2. 02

    BLE audio

    The XIAO streams the recording to the phone over Bluetooth Low Energy.

  3. 03

    Transcribe + classify

    The iPhone app transcribes the audio and decides what kind of item it is.

  4. 04

    File it

    It lands as a note, a reminder, or a calendar event.

Build log

1 entry, newest first

  1. Where Jot stands

    Starting the build log nine days before the V1 target. What Jot is, the parts it's built from, and the milestones between here and a first complete unit.

    Jot is a handheld push-to-talk voice-note device. Press the button, speak, release. The recording goes over Bluetooth Low Energy to an iPhone app, which transcribes it and turns it into a note, a reminder, or a calendar event.

    The parts

    • Brain: Seeed XIAO nRF52840 Sense, handling the button, audio capture, and the BLE link.
    • Host: an iPhone app that receives the audio and does the transcription and sorting.
    • Board: a custom PCB, fabricated by JLCPCB.
    • Case: 3D printed.

    The plan to V1

    1. Breadboard prototype
    2. BLE audio to iPhone
    3. Voice to notes, reminders, and calendar events
    4. Custom PCB and 3D-printed case

    The target for the first complete unit is 9 October 2026. Future entries will cover each step as it happens: what worked, what didn't, and why.