Abstract: A double-layer frequency selective surface (FSS) built on FR4 substrate exhibiting two notch frequencies in the 0-10-GHz range is introduced. Recently published examples demonstrate that ...

When I wrote about a DIY ESP32-S3 internet radio last week, "raspbeguy" commented he'd rather choose an ESP32-based DIY DAB+ ...

Flash Bee is an easy-to-make DIY handheld lightning detector based on an ESP32-C3 board, a round display, and AMS AS3935 ...

Abstract: In this tutorial brief, we introduce a unified wideband phase-noise theory framework of frequency synthesis based on a multirate timestamp modeling with ...

The hardware was assembled by connecting the Arduino UNO R4 WiFi, the PZEM 004T, the current transformer, and the OLED ...

The 24/7 National Weather Service radio frequency serving the Galveston area mysteriously went dark Tuesday afternoon, initially catching even the local NWS staffers by surprise. At 1:49 p.m., the NWS ...

MITCHEL FIELD, N.Y., March 25, 2026 (GLOBE NEWSWIRE) -- Frequency Electronics, Inc. ("FEI" or the "Company") (NASDAQ-FEIM), a leading provider of precision timing and frequency control products for ...

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MITCHEL FIELD, N.Y., March 25, 2026 (GLOBE NEWSWIRE) — Frequency Electronics, Inc. (“FEI” or the “Company”) (NASDAQ-FEIM), a leading provider of precision timing and frequency control products for ...

This library is to use a transformer (TRAFO) like the ZMPT101B to measure the AC line voltage. The library was inspired by a discussion on the forum about using an external ADC for the ZMPT101B ...