Category Archives: Power

Kilowatt Counter Cleverness

Posted on 2026-02-26 by M. Eric Carr

A vintage Westinghouse watt-hour meter uses a unique, efficient readout design. Continue reading →

Posted in Design, Power, User Interface Design | Leave a comment

Running On Empty: Adventures in a Kia Niro EV

Posted on 2024-12-31 by M. Eric Carr

In which an unsuspecting rental Kia Niro EV is used off-label and taken on a thousand-mile road trip. Continue reading →

Posted in High Voltage, Power, Reviews, Toys | Tagged , , , , , , , , , | Leave a comment

The USB-C High Voltage Hydra: Don’t Get Bit!

Posted on 2024-07-29 by M. Eric Carr

USB-C multiple-device charging cables can subject devices to excessive voltage. Here’s the story. Continue reading →

Posted in Design, Digital Citizenship, Electronics, Power | Tagged , , , , | Leave a comment

TTGO T-Display Deep Sleep

Posted on 2022-12-26 by M. Eric Carr

10mA isn’t an acceptable sleep current. Here’s how to put the TTGO to sleep. Continue reading →

Posted in Arduino, C, Coding, Digital, HOW-TO, Power | Leave a comment