[IT168 News] The sharing bicycle program is forming a trend in the world, and millions of people have benefited from it. At present, the shared bicycle market in China is also booming. However, few of these cyclists wear helmets - this move is very dangerous. According to a survey conducted by the Bicycle Helmet Safety Institute, more than 800 cyclists were killed on roads in the United States in 2015. In response to this question, Isis Shiffer, who just graduated from the Pratt Institute of Industrial Design in New York City, came up with a solution - EcoHelmet is a recyclable folding helmet designed for shared bike riders. This design wins the 2016 Dyson Design Award (James Dyson Award 2016) International Group Award. EcoHelmet helmets use a unique honeycomb shape that protects the user's head against external impact. When not in use, they can be folded and stored. The helmet's biodegradable coating maintains a rainproof effect for up to three hours. EcoHelmet's lightweight and durable design allows users to ride safely and confidently. The honeycomb structure of the EcoHelmet helmet can evenly disperse when the head is hit, and the protective effect is not lost to the traditional polystyrene helmet. Because each "hive" is radial, helmets can help users resist external forces from any direction. EcoHelmet is simple in construction, cheap in material and low in production cost. Shiver said that she plans to sell this helmet at a bicycle sharing site at a price of US$5 (about 34 yuan). The designer Isis Schiffer said: “I was fortunate to be able to take a one-semester course at the Royal College of Art and Imperial College and get into the impact laboratory of Imperial College. The laboratory has a helmet striking device that reaches the European standard. , I collected enough data to design the unique honeycomb shape of Ecohelmet, confirming the feasibility of the design and its value." James Dyson, the “Design King of the United Kingdomâ€, founder of the Dyson Design Awards, said: “EcoHelmet has solved a very common problem in a very clever way. The seemingly simple design has actually condensed a lot of research effort. I hope EcoHelmets can It is widely used in the global sharing bike program."
0-10V/PWM/RX Dimming Driver
Drivers with dimming capability can dim the LED light output over the full range from 100% to 0%. Dimming drivers can dim LEDs by reduction in the forward current, pulse width modulation (PWM) via digital control, or more sophisticated methods. Most dimming drivers operate using the PWM method. With this method, the frequency could range from a hundred modulations per second to as high as hundreds of thousands of modulations per second, so that the LED appears to be continuously lighted without flicker.
At present, the most commonly used LED dimming power: LED thyristor dimming power, LED 0 / 1-10V dimming power, PWM dimming power supply. Other dimming works by controlling the current and voltage, the frequency of the output to achieve the LED dimming function.
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â–² EcoHelmet helmet 
â–² EcoHelmet helmet 
â–² JDA2016 James Dyson and winners