Electronics
Circuit Builder
A desktop circuit editor and simulator I built myself: sketch a schematic, wire it up, and watch it actually work in DC, transient, and frequency response.
- Wrote my own nodal analysis solver for DC, transient, and AC, with no NumPy or SciPy
- Live Simulate mode shows the voltage at every terminal, updating as you edit the circuit
- Frequency response and Bode plots, with the sweep range guessed from the circuit's own values
- Full undo/redo, wire splitting and tapping, and a plain-JSON save format
EEE Lunar Rover
A WiFi-controlled rover that drives across a mock lunar surface, hunts down artificial rocks, and reads their signals to work out what type each one is.
- Awarded Best First Year Project 2026 at Imperial College London
- I designed, tested, and debugged the infrared and magnetic circuits, and soldered three of the four sensor boards
- Built a separate analogue circuit for each of the four sensors, then combined them onto one PCB
- Chose Ackermann steering over differential drive so the rover wouldn't drift when its motors weren't perfectly matched
- Controlled and monitored live from a browser over WiFi
Operational Amplifier in LTSpice
What’s actually inside an op-amp? I spent a few months teaching myself, then built one from scratch out of individual transistors in LTSpice to find out.
- Learned and built every stage myself: differential pair, current mirrors, and a Darlington output stage
- Tested it by stepping the feedback resistor through four values and checking the gain against theory
- Measured gain matched the predicted Rf/Rin ratio almost exactly, even at ×1000
Digital Alarm Clock
A 24hr digital alarm clock I designed and built from scratch for a real client brief: a custom-etched PCB, crystal-accurate timekeeping, and a 3D-printed case.
- Crystal-accurate 24hr timekeeping, using a 32kHz oscillator and EEPROM storage
- Etched and soldered the PCB by hand, with its own dedicated voltage regulator
- 3D-printed PLA case with laser-cut acrylic faces (190×90×90mm, 500g)
- Designed end-to-end for a real client brief and tested against every spec point
E
Electronic Reaction Time Game
A reaction-time game built around LED chasers, with a custom PCB and a 3D-printed triangular enclosure I designed myself.
- LED chaser sequence: light travels along the strip and you react to stop it on target
- Custom PCB built around the CD4514BE demultiplexer
- Housed in a 3D-printed triangular enclosure I designed in CAD