Engineering-first robotics, AI, maker hardware, STEM, and creator technology reporting
Maker Culture covers maker hardware, embedded systems, 3D printing, fabrication tools, sensors, lab gear, and creator field equipment, with practical guidance for workshops, classrooms, and engineering teams.
A free-space quarter-wave is about 17.3 cm at 433 MHz and 8.2 cm at 915 MHz, but feed point, ground, enclosure and legal band limits still determine the installed RFM69 antenna.
RFM69 Antenna Length: Start With Quarter-Wave Math, Then Tune the Installation Read More
The PolyDryer Box XL targets 3 kg spool storage with sealed filament feed-through, humidity monitoring, and optional Dry Dock support. TVG evaluates the engineering promise, ecosystem costs, and tests that matter.
Polymaker PolyDryer Box XL Review Preview: A 3 kg Spool Vault, Not a Standalone Dryer Read More
The MAX17048 estimates single-cell Li-ion state of charge from cell voltage with ModelGauge, exposing voltage, percentage and a programmable active-low alert over I²C.
MAX17048 Fuel Gauge: Read State of Charge Without a Sense Resistor Read More
The DS3502 gives firmware 128 steps across a 10 kΩ potentiometer, but the wiper remains an analog node with voltage, loading and startup-state limits.
DS3502 Digital Potentiometer: Treat the Wiper as an Analog Node Read More
A 3.3 V data signal can sit below the guaranteed high threshold of a 5 V WS2812B. A 74AHCT buffer restores margin before code changes mask the electrical fault.
NeoPixel Errors From a 3.3 V Controller? Fix the Logic-Level Margin First Read More
Jellyfin’s dashboard names the active playback path. Direct Play changes nothing, Remux changes the container, Direct Stream converts audio, and Transcode re-encodes video.
Jellyfin Playback Modes: Read Direct Play, Remux, and Transcode Before Upgrading Hardware 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 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
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
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