Engineering-first robotics, AI, maker hardware, STEM, and creator technology reporting
Measure PCF8523 drift in ppm, convert it to the signed offset register, and rule out oscillator-stop and backup-battery faults before calibration.
Calibrate PCF8523 RTC Drift and Check Backup Failures First Read More
INA260 averaging reduces noise but multiplies the time before a current, voltage or power alert can react. Calculate the conversion window before debugging firmware.
INA260 Alert Arrives Late? Calculate the Averaging Delay Read More
MCP9808 alert behavior depends on open-drain wiring, threshold mode, hysteresis and conversion time—not only the programmed temperature limit.
MCP9808 Alert Pin Chatter? Match Hysteresis to Conversion Time Read More
Repeatable TCS34725 readings depend on fixed illumination, sensor geometry, gain and integration time—not just converting raw channels to an RGB color.
TCS34725 Color Readings Drift? Control Gain, Exposure and Illumination Read More
A silent DRV2605L needs more than an I2C check: verify actuator mode, waveform sequencing, GO behavior and the DIAG_RESULT calibration flag in order.
DRV2605L Motor Silent? Separate Trigger, Actuator and Calibration Faults Read More
MPR121 false touches are easier to diagnose when filtered data, baseline tracking, threshold hysteresis and debounce are checked separately instead of raising every threshold.
MPR121 Ghost Touches: Read the Baseline Before Raising Thresholds Read More
The SHT31’s internal heater is a plausibility-check tool, not a condensation cure or normal measurement mode. Use commands 0x306D and 0x3066 with status bit 13 and label heated samples invalid.
SHT31 Heater Checks: Prove Sensor Response Without Treating Heat as Humidity Data Read More
An SSD1306 ACK proves the controller responds on the bus, not that its panel power and scan configuration are correct. Debug a blank OLED by separating transport, initialization and framebuffer transfer.
SSD1306 Acknowledges on I2C but Stays Blank: Trace the Init Sequence Read More
A robust BME280 forced-mode loop starts one conversion, waits for the status register’s measuring bit to clear, then reads the compensated result. Fixed delays hide oversampling-dependent timing.
BME280 Forced Mode: Wait for Conversion Instead of Reading on a Guess Read More
APDS9960 gesture events can repeat or disappear when firmware clears the interrupt without consuming the gesture FIFO. Read status, drain valid datasets, then finish the engine sequence.
APDS9960 Gesture Interrupts: Drain the FIFO Before Clearing the Event Read More