last modified: October 23, 2025
Posted on 2021-04-05— Common
I show two practical ways to print the turntable platform: filling tiny slots with food-safe epoxy for the best light-blocking results, or adjusting infill to avoid epoxy. I include slicer tips, material settings, and GitHub downloads. Read the full post to follow step-by-step instructions and choose the right method.
Posted on 2021-04-05— 3D Printing, Projects
I tested five turntable platform revisions to reduce light inference and compared sensor readings across empty and full compartments. I explain what worked, which trade-offs matter, and why the slot design performs best. Read the full post for detailed measurements, images, and practical notes if you want to replicate this.
Posted on 2021-04-03— 3D Printing, Projects
I walk through the sensor board I designed for the pet feeder, explaining the position sensor, four fill sensors, and why component choices (like the 100kΩ resistor) matter. I keep the design simple and practical — read the full post for schematics, measurements, and ordering details.
Posted on 2021-04-02— 3D Printing, Build
I solved stray light hitting my pet-feeder's fill sensors by filling 3D-printed slots with black, low-viscosity epoxy. Using a syringe I achieved a nearly flush, cleanable surface that keeps measurements accurate. Read the full post for materials, step-by-step photos, and a short demo video if you'd like to try it.
Posted on 2021-03-27— 3D Printing, Projects
I updated my pet-feeder's drive with a TMC2209 SilentStepStick and a 17HS19 stepper to get near‑silent operation and run from 5V. I built a simple Pico-based controller, adjusted gearing for speed, and tested sensors. Read the full update for photos, choices and test notes.
Posted on 2021-03-21— 3D Printing, Projects
I tested the pet feeder’s turntable position sensor and share my measurements, circuit details, MicroPython test code, and a short video of the controller in action. Read on for calibration tips, resistor choices, and next steps for compartment sensors if you want the full tests and sources.
Posted on 2021-03-15— 3D Printing, Common
I've assembled the new input boards for the pet feeder and I'm testing the sensors—940nm IR LEDs paired with phototransistors. I share photos of the board top and underside, the turntable mounting, and revision notes. Please read on if you'd like to see the test results and next steps.
Posted on 2021-02-18— 3D Printing, Projects
In Part 6 I walk you through the input panel for my 3D-printed pet feeder: the rotary encoder, LEDs, knob and the example PCB with wiring, filters and level shifting. I include printable files, Gerbers and ordering tips — read the full post for downloads, schematics and testing notes.
Posted on 2021-02-01— Request for Comments
I've designed an input panel PCB for my pet-feeding device and would appreciate your feedback. It includes a rotary encoder, four LEDs, an I2C-connected LCD interface and an optional 3.3V to 5V level shifter. Please take a look at the board images and schema and share any suggestions or improvements.
Posted on 2021-01-30— 3D Printing, Projects
In this fifth installment I print the turntable and walk through my back-panel options, sensor slots, and recommended print settings. I share filament tips, Fusion360 and STL choices, and simple assembly notes. If you're following the series, read on for files, settings, and practical guidance.
Posted on 2021-01-24— 3D Printing, Projects
In part 4 I show how I insert the insets, assemble the enclosure panels, and print and assemble the lids and knobs. I also cover the front panel (fits Adafruit 20×4 or can be customized), LED covers, and recommended PETG print settings. Please read the full post for files and steps.
Posted on 2021-01-13— 3D Printing, Projects
In Part 3 I print three enclosure panels and the rotary turntable for my 3D-printed cat/pet feeder. I share the STL files, PETG print settings, and notes on warping and difficulty. If you're following the series or planning your own print, read the full post for detailed tips and links to the turntable guide.
Posted on 2021-01-08
I built a 3D-printed cat/pet feeder and documented every step across seven posts: printing the gearbox, assembling parts, crafting the enclosure, and adding electronics and a sensor board. If you want to follow the process or reproduce the device, read the full build series for parts, tips, and notes.
Posted on 2021-01-05— 3D Printing, Projects
I walk you through assembling the gearbox for my 3D-printed cat feeder, step by step. I cover inserting insets, bearings, grub screws, and fitting the NEMA17 motor so the turntable runs smoothly. If you printed the parts from Part 1, follow along — read the full post for photos and testing tips.
Posted on 2021-01-02— 3D Printing, Projects
I'll walk you step-by-step through printing the mechanical parts of a fully functional, programmable cat/pet feeder. I share STL files, material and printer recommendations, and parts lists — all open-source on GitHub. If you have a 3D printer and want a challenging build, read the full post to get started.