Ccircuitrocks·2d agoBuild a Solar-Powered Raspberry Pi Zero W Weather StationSolar-Powered Raspberry Pi Zero: Jack Young's mobile weather station runs on a Pi Zero W and a solar panel.3 min read·circuitrocks.hashnode.dev
Ccircuitrocks·5d agoESP32 Demoboard Adds 5 Sensor Projects: NFC, Lightning, GesturesESP32 Demoboard Adds 5: Five new Arduino demos for an ESP32 demoboard cover gesture sensing, lightning detection, NFC, air pressure and a PIR alarm.2 min read·circuitrocks.hashnode.dev
KKevin Pan·Nov 4UV Intensity Sensor Calibration for Water Disinfection: A Field SOP Buyers Actually UseUV Intensity Sensor Calibration for Water Disinfection: A Field SOP Buyers Actually Use Your UV reactor can look healthy on the HMI and still be off-spec. The dose algorithm only trusts what the inten7 min read·yoyouv.hashnode.dev
Ccircuitrocks·Nov 1DIY Handheld Spectrometer Uses a TCD1304 CCD and STM32DIY Handheld Spectrometer Uses: An STM32 board, a TCD1304 linear CCD and a 4-inch SPI display turn a diffraction grating into a battery-powered pocket…2 min read·circuitrocks.hashnode.dev
Ccircuitrocks·Oct 31Hidden Lockbox Opens Only to a Secret Magnet GestureNo keyhole, no keypad: a Teensy 4.1 and an 8x8 Hall-sensor grid unlock this wooden box only when you trace the right magnetic gesture.2 min read·circuitrocks.hashnode.dev
Ccircuitrocks·Oct 22Weekend Build: Give Your Plant a Tamagotchi Face with ESP32Weekend Give Plant Tamagotchi: CMU's OATs put an ESP32-S3 and E Ink face on plants and fridges.2 min read·circuitrocks.hashnode.dev
Ccircuitrocks·Oct 20Raspberry Pi Pico Halloween Builds: Motion-Triggered Spooky PropsPico-powered Halloween props: LED skulls, a skeleton robot, and a portrait with moving eyes. Here is how to wire a motion trigger without frying a GPIO.2 min read·circuitrocks.hashnode.dev
Ccircuitrocks·Oct 6UNIHIKER K10 Package Measurer: ToF Sensor Plus ScaleUNIHIKER K10 Package Measurer: A UNIHIKER K10, an 8x8 ToF matrix, and an HX711 scale team up to measure a parcel's weight and size, then pull up shipping…2 min read·circuitrocks.hashnode.dev
Ccircuitrocks·Sep 27IronEar's ESP32-S3 Sensor Hears 500 Sounds, Skips the CameraIronEar's ESP32-S3 Sensor Hears: An open-source ESP32-S3 sensor node classifies 500+ household sounds on-device and reports to Home Assistant over MQTT or…3 min read·circuitrocks.hashnode.dev
Ccircuitrocks·Sep 25Three Kids Built a Raspberry Pi 3 Underwater Camera for £130Three kids sealed a Raspberry Pi 3 and a DS18B20 sensor in a £130 acrylic tube to log river temperature and video on their own.2 min read·circuitrocks.hashnode.dev
