How to build a wireless video surveillance system

Wireless video surveillance equipment on the market is available in a variety of ways, ranging in price from a few hundred to several thousand. In the actual sales process of wireless monitoring equipment, customers often say that it is unstable when used with cheap equipment. One point for t

Several guard points for the power adapter

The power adapter is a power supply that uses modern power electronics technology to control the ratio of the turn-on and turn-off of the switch to maintain a stable output voltage. The power adapter is generally composed of a pulse width modulation (PWM) control IC and a MOSFET. The cost