To get ready, he made a breakout board for 32-channel analog multiplexer device he wants to use. He put the project out on Hackaday.io and also has a video tutorial you can see below. There are ...

The circuit is simple enough: a CMOS analogue multiplexer does the routing, and a set of opto-couplers do the selecting based on the power inputs. A set of USB A sockets connect to the computer ...

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Integrated multiplexer. Integrated pre-alarm memory for alarm verification.Automatic establishment of ISDN/POTS/GSM/TCP/IP connection in the evert of alarm. Parallel transmission of up to 10 camera ...