If you’ve seen a big air-variable capacitor, you may have noticed that some of the plates may have slots cut into them. Why? [Mr Carlson] has the answer in the video below. The short answer: you can ...

Choose the VFD control mode based on the ratio of the system pressure to maximum internal pump pressure. For a centrifugal pump delivering to a system with high operating pressure and or high static ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Ebony Howard is a certified public accountant and a QuickBooks ProAdvisor tax expert. She ...

Abstract: Pulse-width modulation in cable-fed motor drive systems can generate high-frequency effects, which include terminal overvoltage (TOV) stress and common mode voltage (CMV) imbalance. This ...

Laptop drive almost full? Need to back up your photos? Desktop-size and portable platter storage has never been cheaper. Our deep-dive reviews help you track down the right external hard drive. Since ...

External USB/Thunderbolt SSDs and/or hard drives (aka direct-attached storage, or DAS) are a super-convenient way to add storage capacity to your system as well as back it up. External drives are also ...

James Chen, CMT is an expert trader, investment adviser, and global market strategist. Somer G. Anderson is CPA, doctor of accounting, and an accounting and finance professor who has been working in ...

December 24, 2025 Wednesday, Dec. 24, 2025 In today's episode: a lawsuit accusing Vermont of working with service providers to illegally obtain a pregnant woman’s medical info can move forward; also, ...

Abstract: High-frequency shaft currents in inverter-fed electric drives represent an overlooked electromagnetic compatibility (EMC) vulnerability in modern electric vehicles. Driven by steep ...

The big story this month is price increases on RAM and storage, and the ripples are just starting to show in the SSD space. Picking up a new storage solution, whether you opt for an internal or an ...

Despite the popularity of slim, speedy external SSDs, external hard drives are still essential, cost-effective storage. For as little as $50, you can add a terabyte to your laptop or desktop by ...

Despite the popularity of slim, speedy external SSDs, external hard drives are still essential, cost-effective storage. For as little as $50, you can add a terabyte to your laptop or desktop by ...