last modified: October 23, 2025
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 2018-03-17— Projects
I built a small test board for the TPS61092 to evaluate thermal performance, hand‑solderability, and layout before using it in my project. The chip stayed cool under 0.5A and the OSH Park PCB looked great. Read on for measurements, the BOM, and practical soldering tips if you want to try it.
Posted on 2017-04-12— Projects
I began a second long-term test of my plant watering sensor to confirm it tracks moisture cycles after watering and drying. I'm focusing on logging and sealing the sensor's foot for repeatable readings. If you're curious about methods and results, please read the full post and share feedback.
Posted on 2017-03-04— How and Why
I guide you through writing a near-final firmware for my cheap plant watering sensor, describing module structure, incremental development, and practical tests. I cover ADC sampling, oscillator checks, EEPROM settings and a prototype fix for the push-button. If you’re building a similar device, I invite you to read the full post.
Posted on 2017-02-16— Fun, Projects
I tested 13 SMD LEDs for my plant-watering sensor project, soldering them to a small board and driving them from an Arduino Zero Pro to compare brightness and flash styles. I share photos, part numbers and a short demo video — read on if you’d like the full results and notes.
Posted on 2015-08-27— Projects
I finished a multi-day test of the minimal data logger, recording hourly readings to check stability and battery use. I walk through the reset issue when connecting via TTL, the coarse integer readings, how I imported and charted the data, and the small improvements I plan next — please read on.