How to put a rearview mirror on a bicycle? This does not seem to be a simple matter. The traditional method is to put on the handle, but this way you can only see the side of the rear. Moreover, bicycles and cars are not the same, there is no roof, can not install the kind of rear-view mirror that can be seen directly behind, hanging on the roof. A startup called Smart Bike has come up with such a solution: it uses a camera to record the rear view picture in real time and displays it on the mobile phone fixed on the handle. This camera, called Hexagon, is the first product developed by the company. It can be used as a real-time security camera by connecting with its mobile phone application. In fact, there have been other rear camera or taillight combinations on the market before, such as the Cycliq Fly6[v]. However, Hexagon has his exclusive features such as live riding, tracking sports related data and sports mileage. Smart Bike also claims that Hexagon can also identify if you are involved in an accident and notify relevant contacts in an emergency. This product also has some attached hardware is also very interesting. In addition to the camera function, Hexagon also has an automatic viewing angle rotation function and brake light function, as well as a manual vehicle bell that can be mounted on the handlebars. The included turn signal makes Hexagon look like a replica of Darth Vader's TIE Advanced x1, but Hexagon flashes cool red light. It also comes with a versatile 6000 mAh mobile power that you can use to charge the phone when you are not riding. Hexagon's price was $99 for early offering crowdfunded buyers, not too cheap, but Hexagon also had a cheaper model for only $75 but cut down on the turn signal function (all only for the first batch Buyers). Smart Bike is expected to officially release Hexagon in Indiegogo next week, and is expected to disclose more details. Since Smart Bike's funding is crowdfunded, it also has certain risks: They are still just a newly established company and have not released hardware products before. Reproduced from: Cloud Network More bicycle related hot products please poke here A blackboard (also known as a Chalkboard) is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone. Wooden Chalkboard,Wooden Blackboard,Wooden Sandwich Board,Chalkboard Sign Jinan Tri-Tiger Technology Development Co., Ltd , https://www.tigerwoodproduct.com
A blackboard can simply be a board painted with a dark matte paint (usually black, occasionally dark green).Matte black plastic sign material (known as closed-cell PVC foamboard) is also used to create custom chalkboard art.Blackboards on an A-frame are used by restaurants and bars to advertise daily specials.
A more modern variation consists of a coiled sheet of plastic drawn across two parallel rollers, which can be scrolled to create additional writing space while saving what has been written. The highest grade blackboards are made of a rougher version porcelain enamelled steel (black, green, blue or sometimes other colours). Porcelain is very hard wearing, and blackboards made of porcelain usually last 10–20 years in intensive use.
Lecture theatres may contain a number of blackboards in a grid arrangement.The lecturer then moves boards into reach for writing and then moves them out of reach, allowing a large amount of material to be shown simultaneously.
The chalk marks can be easily wiped off with a damp cloth, a sponge or a special blackboard eraser usually consisting of a block of wood covered by a felt pad. However, chalk marks made on some types of wet blackboard can be difficult to remove. Blackboard manufacturers often advise that a new or newly resurfaced blackboard be completely covered using the side of a stick of chalk and then that chalk brushed off as normal to prepare it for use.