Things I have built.

A transformer-less, direct-coupled linear amplifier that drives magnetic cores from 50 Hz to 250 kHz, so their B–H loops can be measured across four decades of frequency.

Analogue design · KiCad · Proteus · MATLAB

A 16-bit pipelined CPU in VHDL: eight registers, three instruction formats, six stages, and the forwarding and interlock logic needed to keep them fed.

VHDL · Digital design · Computer architecture

Using pretrained language models as a supervisory signal for vision embeddings — a multi-stage schedule that fine-tunes intermediate layers rather than only the head.

PyTorch · Deep metric learning · Vision-language models · ResNet-50

Turning Maximum Concept Matching from a zero-shot method into a few-shot one with prompt tuning, so a model can tell when an input is nothing it was trained on.

PyTorch · CLIP · Prompt tuning · Maximum Concept Matching

Read the surroundings from a camera, synthesise a pattern that disappears into them — the machine-learning half of a friend’s thesis on a sheet that could change its own skin.

Python · OpenCV · PyTorch · pix2pix

Two deliberately lopsided models — one that never calls a positive wrongly, one that never misses a positive — and a meta-model that reads both.

Python · XGBoost · TensorFlow · Ensemble methods

Retraining SSD-MobileNet detectors on small custom datasets, and measuring how much of the feature extractor is worth freezing — the answer was the first four blocks.

TensorFlow · Object Detection API · Keras · MobileNet

Two ultrasonic sensors in a doorway, an Arduino working out which way you walked, and a NodeMCU putting the room’s occupancy on the internet.

Arduino · NodeMCU · HC-SR04 · Adafruit IO

A differential-drive racing bot driven from a phone, on a motor driver board I laid out myself because the ready-made one was the wrong shape.

ATTINY2313A · L293D · Eagle · Bluetooth

A hub motor, a controller and a panel on a bicycle — and two small ideas about when the motor should be allowed to help. Built at thirteen.