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							Video emitter uses battery power: EDN - Design 
							Ideas /  The block diagram in Figure 1 shows 
							how to make a cable-free, direct-video system. The 
							system allows users to walk from booth to booth at 
							an exhibition to interview people and to display the 
							interviews in real time on three screens at key 
							locations. You can use the small and simple system 
							each time you need to capture image and sound on the 
							run. |