Engineering-first robotics, AI, maker hardware, STEM, and creator technology reporting
GitHub will move ubuntu-latest from Ubuntu 24.04 to 26.04 between October 19 and November 19. Pin 24.04 or test the explicit 26.04 labels before rollout.
GitHub Actions Moves ubuntu-latest to Ubuntu 26.04 Starting October 19 Read More
A four-wire bipolar stepper has two isolated windings. Use resistance or continuity—not wire colors—to identify the two pairs before connecting A1/A2 and B1/B2.
Unknown Stepper Motor Wires? Find the Two Coil Pairs With a Multimeter Read More
A MAX31855 NaN is a fault flag, not a diagnosis. Read the low three bits to separate an open thermocouple from shorts to ground or supply.
MAX31855 Reads NaN? Decode the Fault Bits Before Rewiring the Thermocouple Read More
Adafruit’s TCS3448 breakout exposes 14 spectral channels, 1 kHz flicker detection and an Arduino library—but AS7343 projects must account for its fixed 0x59 I²C address.
Adafruit’s TCS3448 Breakout Moves 14-Channel Spectral Sensing to I²C Address 0x59 Read More
A counterfeit card can report a large volume while storing only a fraction of it. F3 writes and reads the claimed space so aliasing, corruption and overwritten sectors become visible.
Verify a microSD Card’s Real Capacity with F3 Before Trusting It Read More
DFRobot’s HUSKYLENS 2 combines a 6-TOPS edge-AI processor, touchscreen, camera, Wi-Fi and microcontroller interfaces. Here is what the documented hardware offers—and what remains unproven.
DFRobot HUSKYLENS 2 Brings 6-TOPS Edge AI to Classroom Robotics Read More
“Wrong boot mode detected” means the ESP32 ROM answered but did not sample the download-mode strap. This sequence separates GPIO0 loading, EN timing and USB-UART control-line faults.
ESP32 Wrong Boot Mode: Diagnose GPIO0, EN, and Auto-Reset in Order Read More
Raspberry Pi’s September desktop update adds an optional icon dock, searchable launcher, editable shortcuts and a lighter background path while leaving the familiar taskbar as the default.
Raspberry Pi OS Adds an Optional Dock and Launcher—Here’s What Changes Read More
For a DS18B20, 85°C is the temperature register’s power-on value—not proof of actual heat. Check conversion completion, CRC, power mode and the Linux w1_therm output in that order.
DS18B20 Stuck at 85°C? Verify the Conversion Before Replacing the Sensor Read More
A 4–20 mA loop can read zero because the supply is missing, the series path is open or the meter is connected incorrectly. These measurements separate the three without hiding the fault.
Reading 0 mA on a 4–20 mA Loop? Find the Open Without Bypassing the Fault Read More