Some people can’t be bothered to read the analog face of a traditional clock. Some people cannot stand the low frequency “hum ...

The Meter Pro from SwitchBot is so easy to use, and will keep me updated on firework smoke, air hazards and more.

This paper proposes a single-phase grid voltage fundamental frequency estimation technique for smart meters. The technique relies on a nonlinear Newton-type algorithm and a recursive differentiation ...

The meter is based entirely on basic digital circuits and does not include a microprocessor. A large-capacity ROM is used to convert the data, which are proportional to the line period, into line ...

Audio frequency detection is the process of identifying the pitch or dominant frequency of a sound signal. Three common methods used are Fast Fourier Transform (FFT), AutoCorrelation, and ...

I often ask people: What’s the most important thing you need to have a successful fishing trip? I get a lot of different answers about bait, equipment, and boats. Some people tell me beer. Bu… ...

Learn to build an RFID based attendance system using Arduino with step-by-step instructions, circuit diagrams, and complete code. This $35 DIY project replaces expensive commercial systems with ...