If required, which level shifter should I use as it has to pass the high frequency signals? Please suggest. Can you operate everything at 3.3V and use the TLC555 instead of NE555? The TLC555 can ...

NE555及外围元件组成无稳态电路。NE555输出端（③脚）的电平高低转换时间由电容C1的充、放电时间决定。 即C1的充、放电时间分别是电力搅拌器M的通电和断电时间，因此调节C1的充、放电时间就可以实现M的定时自动运转。 NE555的③脚输出高电平时，继电器K得电 ...

随着 5G 的到来，手机中的 RF 设计也日益愈加复杂，使得手机制造商更难满足严格的性能要求。由于手机包括更多天线，支持更多频段，在所有使用条件和频率下保持天线性能变得越来越具有挑战性。阻抗调谐器可在不同的条件下，在多个频段之间，最大限度地 ...

Home security doesn't need to be professionally installed. Secure your home while saving money with our picks of the best DIY security systems. Macy Meyer is a North Carolina native who graduated ...

We get it — life gets busy. Maybe you’re having trouble coming up with a costume idea or can’t make it to the store to pick up a full outfit, so we put together a list of DIY Halloween costumes that ...

[Peter Lin] demonstrated this in the video below the break, by creating an ultrasonic levitation system using only the trusted chip of all true experimenters, the NE555. (Video, embedded below.) ...

The best home security systems offer a convenient and user-friendly approach to home protection, and the top DIY models allow you to set up your security without needing professional installation.

I am the Labs Manager for CNET's Home Division based in Louisville, KY. My interest in technology began in the early '90s, and soon after I began my double major in computer science and computer ...