Build

MedusaHC: Open-Source Python Toolchanger for Klipper

MedusaHC adds automatic hotend changes to a Klipper printer through an open-source mechanical system and Python controller. The beta project coordinates pickup, parking, feeding, priming, cleaning, and sensor checks, while keeping familiar commands. It suits careful makers testing multi-material setups, but requires mechanical work, calibration, and the repository’s installation guide.

Read the build on github.com: MedusaHC: Open-Source Python Toolchanger for Klipper

3D Printing

Featured in TinkerNews Issue 53 · 15 September 2026

6 builds

Build an Open-Source RP2040 Logic IC Tester

Bench testing gets a practical companion in the OD-PT74, an open-source RP2040 tester for 14-, 16-, and 20-pin 74xx TTL and CMOS chips. Its OLED, rotary encoder, selectable test modes, complete PCB files, and editable 3D-printed enclosure make it a reproducible workshop instrument.

Read the build on pcbway.com: Build an Open-Source RP2040 Logic IC Tester

Yertle: A 3D-Printed Quadruped for Locomotion Research

Four printed legs give Yertle a practical robot for studying locomotion. Its open-source files cover the mechanical build, while C++ and Python connect hardware with control, simulation, and machine-learning work. Expect assembly, electronics, programming, and calibration—not a ready-made machine.

Read the build on github.com: Yertle: A 3D-Printed Quadruped for Locomotion Research

Build a Low-Cost 3D-Printed AirFlow Microreactor

At about £100, the AirFlow microreactor uses a printed chamber, forced hot air, and Arduino control to hold LAMP reactions near a steady temperature. The Biomaker project hub presents it as an evolving open build, with downloadable files and practical notes for classrooms, community labs, and DIY researchers.

Read the build on biomaker.org: Build a Low-Cost 3D-Printed AirFlow Microreactor

Converting a K1 SE Toward K1C Features

A community discussion records one maker’s work adding K1C-like cooling and temperature sensing to a Creality K1 SE. The changes involve fans, a thermistor, wiring, firmware, and Klipper configuration—not just printed or mounted parts. It also warns against assuming K1C firmware will work safely on every K1 SE.

Read the build on github.com: Converting a K1 SE Toward K1C Features

What Happened When Resin Printing Got Another Test

Six years after shelving SLA printing, the author tests a new resin printer against 2020 expectations. The results include good-looking parts, failed jobs, setup headaches, and software friction. Fluidd’s open browser workflow makes a useful contrast with slicer APIs, cloud services, authentication demands, and vendor-controlled access.

Read the build on hackaday.com: What Happened When Resin Printing Got Another Test

All 6 builds in 3D Printing