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LED Traffic Lights

An unusual implementation of LED traffic lights.

This is a programmable unit employing a 2k byte CMOS static RAM chip (Sony CXK5814P-35L) and a latch (74LS273 or 74HC273). A 555 timer is used as a clock and is connected to the CLK input of the latch.

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Indexed: 27/02/2018 13:00
Views: 416
Source: Julian Ilett

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