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DIY High-Speed Book Scanner from Trash and Cheap Cameras

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Step 40: Video Switch: Solder all grounds together.

Connect all grounds/shields together. The two input grounds and the output ground should be soldered together. I found the grounds by touching my multimeter to the shield of each jack and to pins on the board until I found a connection. After soldering all the ground wires together, I applied heat shrink tubing for durability.

 
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