With, October 30, 2012, Philips sold the latest high-tech LED lights in the Hue series Apple Store, and only sold by Apple. Hue series will be completely self-definition, and by one of three primary colors, red blue, and green LED bulbs can be mixed out of 16 million kinds of colors of light. The whole process is completed on the App iPhone to control. Giving rise to a new thinking intelligent light control development, domestic stakeholders have also studied. As Hue is using WiFi wireless control, and domestic WiFi is not universal, this study used more generally Bluetooth technology, Bluetooth cell phone communication with the microcontroller to generate an adjustable duty cycle PWM wave signal control LED driver circuit implementation of LED dimming DIY color.

Pulse width system (PWM) dimming technology

PWM dimming is the use of simple digital pulses repeatedly switch dimming LED driver technology. Application of systems that only need to provide a wide, narrow different digital pulse can be easily realized by changing the output current, thereby adjusting the LED brightness. PWM dimming has the advantage of a large dimming range, as long as sufficient bandwidth, any analog value can be encoded with PWM, PWM dimming can precisely control the LED brightness, but also ensure LED light chromaticity. led grow lights https://www.eneltec-led.com/products/led-grow-lights

Bluetooth technology basics

Bluetooth is the founder of the Swedish company Ericsson, Bluetooth is a wireless data and voice communications open global specification, which is a low-cost short-range wireless connection, based on the establishment of a special connection for fixed and mobile communication environments. Data sharing between phones via Bluetooth has become common sense, will be transformed into a remote control handset tremendous convenience to people's lives. best led headlights http://bestledheadlight.com/

Bluetooth radio work globally 2.4GHzISM (ie industrial, scientific, medical) band, supports full-duplex transmission, using IEEE802.15 protocol. The Bluetooth device is not even ready to use, has anti-interference ability, and is easy to use.