Matt circuit

Now we're going to talk about the selection of LED strip lights for home decoration. You should pay attention to the following notes on how to select LED strip lights. Why LED strips are always recommended for home decoration? Because: 1. LED strip light is soft. It can curl like power wire. 2. It can be cut and connected. 3. The bulb and the circuit is completely encapsulated in a flexible plastic cover, which ensures a good insulation, waterproof, safe condition in use. 4. LED strips are weather resistance(-20-50 ℃). LED strip lighting for home decoration 5. It's not easy to break. Besides, it has a long life, up to 80,000 ~ 100,000 hours. 6. It's easy to make graphics, text and other shapes. 7. It has rich colors. The color effects include white, green, yellow, red, orange, warm white, red and blue, purple, or mixed colors. 8. Energy-saving and eco-friendly. Cold light, No radiation, no mercury elements, no harmful substances. 9. Easy installation. Widely used in home de...

When turning a computer on and off, various peripherals (such as printers, screen, scanner, etc.) often have to be turned on and off as well. By using the 5-V supply voltage from the USB interface on the PC, all these peripherals can easily be switched on and off at the same time as the PC. This principle can also be used with other appliances that have a USB interface (such as modern TVs and radios). This so-called ‘USB-standby-killer’ can be realized with just 5 components. The USB output voltage provides for the activation of the triac opto-driver (MOC3043) which has zero-crossing detection. This, in turn, drives the TRIAC, type BT126. The circuit shown is used by the author for switching loads with a total power of about 150 W and is protected with a 1-A fuse. The circuit can easily handle much larger loads however. In that case and/or when using a very inductive load a so-called snubber network is required across the triac. The value of the fuse will also need to be changed as app...