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Jason Too · Cambridge, UK

I build hardware, software and ML that work together.

PCBs, firmware, models and apps, designed as one product. Most of it is open source, the boards are on sale, and I take on client projects.

Shipped
Nine hardware products, 596% funded on Crowd Supply and listed on Mouser (opens in new tab)
Since 2019
Putting AI into products, from edge models to agentic workflows

Covered by

HackadayHackster.ioCNX SoftwareEspressif

Selected work

Open hardware you can buy, and developer tools you can run.

Spark Analyzer PCB featuring ESP32-C3 microcontroller, USB-C PD controller, OLED display, and power measurement circuitry with WiFi antenna

Spark Analyzer

£40

Open hardware

Open-source USB-C PD analyzer and programmable supply

Build details for Spark Analyzer

Open-source USB-C PD analyzer and programmable power supply built on the ESP32-C3. Set any voltage from 3.3V to 21V with 20mV precision, monitor current draw in real-time via WiFi or BLE, and log power consumption over time. Full transparency — inspect the schematic, modify the firmware, or manufacture your own.

Set the exact voltage, watch the live current draw, and log it, instead of poking at a charger and hoping.

  • See exactly what your USB-C charger and device are negotiating
  • Set any voltage from 3.3V to 21V with 20mV precision
  • Monitor current and power draw in real-time via WiFi or BLE
  • Open-source firmware—customize everything
GitHub (opens in new tab)
Tracer wearable sensor board with LSM6DSLTR 6-axis IMU, coin cell battery holder, compact circular PCB design with mounting holes

Tracer

£40

Open hardware

Ultra-low-power motion tracker designed for wearables

Build details for Tracer

Ultra-low power IMU tracker that runs 30+ days on a CR2450 coin cell. Combines a 6-axis IMU with deep sleep between motion events and adaptive reporting. Compact enough to embed in any wearable — step counters, gesture controllers, sports trackers. Open-source design, TinyML-ready firmware.

A month of motion tracking from a coin cell, small enough to actually build into a wearable.

  • 30+ days battery life from a CR2450 coin cell
  • 6-axis IMU with motion-triggered wake-up
  • Compact enough to embed in any wearable
  • Ready for TinyML deployment

Patchly

Developer tool

Catches production crashes, explains the root cause in plain English, and opens a draft pull request with the fix.

Build details for Patchly

Error monitoring for apps where AI writes much of the code. Patchly catches the crash in production, explains the root cause in plain English, and opens a draft pull request with the fix. Your CI runs on it, and you decide whether to merge.

Plant-Bot · £30 · Solar-powered plant care Explore the store

About

I'm Jason Too, a Cambridge-trained engineer who owns products end to end, from hardware and firmware to ML, apps and the web. I'm increasingly focused on using AI and agentic workflows to change how I build, test and ship.

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