How to choose raspberry pi touch screen?

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Raspberry Pi is a powerful portable computer form factor features sales targets for computer hobbyists and DIY technology enthusiastic fans, while allowing many children to learn programming, recently its sales exceeded 3.8 million. But there hasn’t official Raspberry Pi touch screen accessories. Recently, the European TC Disrupt Conference, Raspberry Pi inventor Eben Upton said that, this is really going to publish official touch screen. This is a good thing for the fans, but if you can’t wait for the official product, then there is four display options. 2.8-inch TFT Pi: $ 35 It is a palm-sized, full-color screen, about 2.8 inches, is 16 pixels. It is suitable for many projects. Some touch screen cameras are made by them. You could search for them in the internet and it is a cheap alternative. 3.5-inch TFT Pi: $ 57 The screen is 3.5 inches TFT display, which was originally on kickstarter to raise the public; the proceeds are expected to be 20 times. It is characterized by the market are thinner than other screens. Capacitive touch screen: $ 112 Capacitive touch screen is expensive relatively, because its size is 10 inches. It is LCD screen, its developer Michael Castor early also use it to make a Piped. Unfortunately, it is now only a refurbished version of the sale. HDMI Pi: $ 120 This is a price of your side, but it is only a support HDMI raspberries come in display, but also in the congregation to raise its performance is also very successful. These prices are only reference price. And now 7 Inch TFT LCD display monitor for Raspberry Pi with driver Sainsmart board HDMI is on sell in yasurs.