The DS-K4H250S Single-door magnetic lock is designed for wooden door, glass door, and stee... Hikvision DS-K4H250D double-door magnetic lock The DS-K4H250D Double-door magnetic lock is designed for ...

The DS-K4H250S Single-door magnetic lock is designed for wooden door, glass door, and stee... Hikvision DS-K4T108-U1 Value Series Bolt Electric Lock Bracket U-bracket of Electric Bolt, for Using with ...

His latest creation: you guessed it, is a secret bookcase door. For this tutorial ... an emergency exit at a minimum. A fail-safe magnetic lock hooked up to an Arduino, along with a kill switch ...

In this week’s least surprising news, Google has announced it’s discontinuing the Nest Protect Smart Smoke and CO alarm and ...