IEEE

Angle-Selective Surface Based on Frequency-Selective Surface Using Compact Double-Layer Patch-Coupled Resonance

Abstract: In this letter, a new miniaturized dual-polarized angle-selective surface (MDASS) design is proposed using a compact double-layer patch-coupled resonant frequency-selective surface (CDPR-FSS ...
Hackaday

DIY SI5351 Radio Tunes In SW, MW, And More

There are plenty of radios you can buy that pick up MW and SW bands if that’s what you’re into. Or, you can follow [mircemk]’s example, and whip one up yourself instead. The build employs an ESP32 as ...
IEEE

Frequency Estimation for Energy Rate-Based Forced Oscillation Source Identification Using Its Properties on Modes Decomposed by Matrix Pencil Function

Abstract: Forced oscillation (FO) source identification prevents the impending threat to power system security. This article proposes a methodology to accurately estimate FO frequency for source ...
Hackaday

Hack Improves Cheap Speed Controllers

Tony Goacher] has worked with a lot of cheap brushless DC motor controllers built in China. They can be very cost-effective, ...