Engineering-first robotics, AI, maker hardware, STEM, and creator technology reporting
An MCP3008 code is a ratio to VREF, not an absolute voltage. Use 1024 code intervals, preserve the reference value and do not mistake the top code for VREF itself.
MCP3008 ADC Codes: Convert Readings With the Voltage You Actually Reference Read More
Universal Robots Gen7 adds three g-Series arms and an AI-ready flange carrying data, power and safety. CB7 also brings 40% more compute in a 30% smaller footprint.
Universal Robots Gen7 Moves Power, Data and Safety to the Tool Flange Read More
An I²C scanner proves that something acknowledged at 0x76 or 0x77; it does not prove the device is a BME280. Read chip-ID register 0xD0 and expect 0x60.
BME280 Found on I²C but begin() Fails: Read 0xD0 Before Rewiring Read More
A PCA9685 stores pulse edges as 12-bit counts, not microseconds. Convert the servo pulse width using the actual PWM frequency, then calibrate the oscillator before trimming endpoints.
PCA9685 Servo Timing: Convert Microseconds to 12-Bit Counts Without Guessing Read More
Hirebotics has shown conveyor line tracking for Cobot Painter and a modular rail for larger workpieces, with manual rail positioning available before a planned automated version.
Hirebotics Adds Conveyor Tracking and 5-Foot Rail Modules to Its Cobots Read More
A silent TB6612FNG channel can be in standby, stopped by its truth table, or receiving no PWM. Check logic supply, STBY, PWMA/PWMB and IN1/IN2 before blaming the motor.
TB6612FNG Motor Won’t Move: Check STBY, PWM, and Input State Separately Read More
An ADS1115 repeatedly returning 0x7FFF has reached positive full scale. Check the PGA range and absolute input limits before treating extra samples as more precision.
ADS1115 Full-Scale Codes: Why 0x7FFF Usually Means Clipping Read More
A creator-built UNO Q prototype reads a 0–60 PSI analog gauge from USB-camera frames with a MobileNetV3-Small model, while documenting weak accuracy at the range extremes.
Arduino UNO Q Prototype Reads a 0–60 PSI Gauge Locally at About 2 FPS Read More
A negative INA219 current reading can indicate real reverse flow or reversed shunt polarity. Check VIN+ and VIN−, shunt voltage sign, and calibration state in that order.
INA219 Shows Negative Current? Check VIN+ and VIN− Before Recalibrating Read More
An ESP32 that wakes as soon as it sleeps may still see an active EXT0 or EXT1 level. Print the wake cause, inspect the pin state, and deinitialize RTC GPIO after EXT0 wake.
ESP32 Wakes Immediately From Deep Sleep? Read the Wake Cause Before Changing Pins Read More