Fred Fourie is building a low-cost underwater camera for shallow deployment, and his prototypes are already returning fascinating results. You can build your own PipeCam, and explore the undiscovered depths with a Raspberry Pi and off-the-shelf materials. Materials and build In its latest iteration, PipeCam consists of a 110mm PVC waste pipe with fittings and a 10mm perspex window at one end.
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PipeCam: the low-cost underwater camera