Free Workshop Tools

Small, fast, ad-free calculators and utilities from the Hark Tech workshop bench. More on the way.

Resistor colour code calculator

Decode 4, 5 and 6 band resistors, or reverse-lookup from a value like 4.7k or 2M2 to the band sequence.

STL price estimator

Upload a 3D model and get a printing quote in seconds — volume-based pricing, PLA or PETG, no account required.

Open-source printer projects

Tools and research I've written for my own workshop and released on GitHub — mostly Creality K2 and Klipper-related. Fork them, file issues, send pull requests.

KAMP-K2

Klipper Adaptive Meshing & Purging, forked and adapted for the Creality K2 with a one-line auto-installer. Skip the manual patch-and-pray.

Python · View on GitHub →

K2 adaptive bed mesh

True adaptive bed mesh on the Creality K2 by bypassing Creality's closed-source prtouch_v3_wrapper.so. Probes only the part footprint, not the full bed.

Python · View on GitHub →

K2 reverse-engineering notes

Research notes, protocol docs and tooling from pulling the Creality K2 firmware apart — useful if you're trying to get real Klipper freedom on the K2.

Python · View on GitHub →

Sunlu S9 Klipper config

Ready-to-flash Klipper config for the Sunlu S9 resin printer using the BTT SKR Mini E3 v3 board. Drop-in starting point if you're converting an S9.

Klipper config · View on GitHub →