touch screen lcd 42.The microprocessor controls the bright and dark state of each infrared emitting tube by setting the two signals to high and low levels according to a certain sequence. Each pin Maximum pressure is5 V, but made to need to drive 165 Zhi infrared emission control, resulting in a large current, as well as in easy to pin burn. In order to solve such a problem , an NPN tube is connected to each of the above two pins and a collector output circuit is used to increase the driving capability. By both at the high level inverted output is set, so the need to write the original is low, low level is set to Gao.

touch screen lcd 42.The microprocessor controls the bright and dark state of each infrared emitting tube by setting the two signals to high and low levels according to a certain sequence. Each pin Maximum pressure is5 V, but made to need to drive 165 Zhi infrared emission control, resulting in a large current, as well as in easy to pin burn. In order to solve such a problem , an NPN tube is connected to each of the above two pins and a collector output circuit is used to increase the driving capability. By both at the high level inverted output is set, so the need to write the original is low, low level is set to Gao. IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.