Engineering-first robotics, AI, maker hardware, STEM, and creator technology reporting
MCP23017 interrupt service is mostly a register-order problem: find the flagged pin in INTF before reading INTCAP or GPIO clears the condition.
MCP23017 Interrupts: Read INTF Before INTCAP Clears the Event Read More
The HC-SR04 can accept a 3.3 V trigger, but its Echo output is 5 V logic. Two 10 kΩ resistors make the basic interface safe and predictable.
HC-SR04 Echo Is 5 V: Divide It Before a 3.3 V GPIO Read More
Arduino’s Maker Faire Bay Area demos put two versions of its dual-brain design in public view: UNO Q for maker projects and VENTUNO Q for heavier edge-AI and robotics work.
At Maker Faire Bay Area, Arduino Puts Dual-Brain Boards Into Live Demos Read More
The ACS72981 carrier’s direction, supply and current range determine zero-current voltage, sensitivity and how much of an ADC’s input span is actually usable.
Choose the ACS72981 Range Before You Wire Its ADC Output Read More
Convert a hotend’s mm³/s limit into a realistic motion speed using extrusion cross-section, then verify which slicer limit is actually active.
3D-Printer Speed Is Capped by Volumetric Flow, Not the Headline Number Read More
Agility Robotics says it is exploring wheeled form factors for different operating environments, but it has not announced a wheeled product or launch date.
Agility Is Exploring Wheeled Robots Beyond Digit 5 Read More
A 5 V UART TX can overstress a 3.3 V-only RX input. Translate each direction from the receiving pin’s limits, then verify thresholds and edge shape.
5 V UART Into a 3.3 V MCU? Shift the Receive Path, Then Check the Return Read More
A hobby servo can pull several hundred milliamps while moving and more than 1 A under load, collapsing a shared 5 V rail even when the PWM timing is correct.
Servo Movement Resets the Controller? Debug the Power Path Before the PWM Read More
GitHub Enterprise Cloud can now send managed users back to Microsoft Entra ID before token, webhook, security-setting, or recovery-code actions.
GitHub Adds Proof of Presence Before High-Impact Enterprise Actions 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