An ultra-low power sensor operates using energy harvesting from various sources for efficient monitoring. The oscillator ...

[ombates] shares a step-by-step method for making a conductive bio-string from scratch, no fancy equipment required. She ...

Getting to Know Home Security Systems We live in a dangerous world. Even in your own home, you can’t be 100 percent certain ...

Matel Keypad RFID access controller support card, password, password plus card, touch to open the door.With door bell button. Matel Keypad RFID access controller can be used as a stand alone ...

In addition, its onboard Passive Infrared (PIR) sensor has no trouble picking out people, vehicles, and animals from motion events, and its LED lamps shine competently. That said, it’s one of ...

I spent more than 14 years on staff, most recently as the director of operations for PC Labs, before hitting the freelance circuit as a contributing editor.

When the PIR proximity sensor detects a person, the supply voltage for the MP3 ... The MP3 player returns to sleep mode. The circuit including batteries is located on a four-layer circuit board. The ...

Say goodbye to embarrassing parking mishaps. Whether you’re after added peace of mind during close-quarters maneuvering of your car or truck or you share a vehicle with a younger or less ...

Originally introduced in 1989, this DIY tool also functions as a capacitance meter ... The resonance meter operates as an adjustable RF signal source, coupling to a circuit and measuring the amplitude ...

Together with the PWM signal generator and IRF540 MOSFET he built a simple and practical circuit for the transformer ... opts for gases like xenon for more efficient propulsion. This DIY high-voltage ...