diy projects
DIY Handheld Spectrometer Uses a TCD1304 CCD and STM32
An STM32 board, a TCD1304 linear CCD and a 4-inch SPI display turn a diffraction grating into a battery-powered pocket spectrometer you can carry.
diy projects
Hidden Lockbox Opens Only to a Secret Magnet Gesture
No 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.
esp32 & esp8266
Proton AI Core Vision+: ESP32-S3 Board With Camera, Mic and IMU
Protonverse Labs packs a 5 MP camera, MEMS mic and 6-axis IMU onto one ESP32-S3 board. Here is what it offers and how to…
robotics
Luxonis OAK 4 FFC Puts Five Cameras on One Robot Board
Luxonis' OAK 4 FFC links five MIPI cameras to a 48 TOPS vision module with PoE+, CAN bus and GPIO. See what it means…
diy projects
A Touchscreen Woven Into Fabric: 96 LEDs per Fiber, Washable
NUS researchers wove 54 LED fibers into a sleeve that plays video, senses touch and survives 50 washes. See how it works and a…
diy projects
Weekend Build: Give Your Plant a Tamagotchi Face with ESP32
CMU's OATs put an ESP32-S3 and E Ink face on plants and fridges. See the parts, the sub-$20 cost, and how to build a…
diy projects
Raspberry Pi Pico Halloween Builds: Motion-Triggered Spooky Props
Pico-powered Halloween props: LED skulls, a skeleton robot, and a portrait with moving eyes. Here is how to wire a motion trigger without frying…
robotics
MIT Roughened Optical Fibers Sense 3D Shape in Soft Silicone
MIT embedded roughened rubber waveguides in silicone to track 3D shape with under 0.4 cm error. Here's how to try the same light-loss trick…
diy projects
UNIHIKER K10 Package Measurer: ToF Sensor Plus Scale
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…
raspberry pi
Pinetek IOL Core4: Add IO-Link Sensors to a Raspberry Pi HAT
A Raspberry Pi HAT with four IO-Link ports turns factory-grade sensors into a weekend project. Here is what the IOL Core4 kit includes and…
diy projects
CircuitPython POV Bike Wheel: Floating Images on 6 LED Strips
Six DotStar strips, a Feather RP2040, and a magnet sensor make a bike wheel draw images in mid-air. See how the timing trick works…
iot & smart home
IronEar’s ESP32-S3 Sensor Hears 500 Sounds, Skips the Camera
An open-source ESP32-S3 sensor node classifies 500+ household sounds on-device and reports to Home Assistant over MQTT or a private LoRa mesh.