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If you have an unknown 7 segment LED display and you want to use it in your project, you need to determine its pinout. The pinout is the arrangement of pins that connect the display to the power supply and the controller. There are different types of 7 segment displays, such as common anode, common…
I recently acquired a few scrap Seltek (now Avaya) wallboards from an insurance company’s call centre, and they turned out to be quite intriguing. Among the items were three call waiting monitors and a SDX ACD scrolling message display, also known as a “wallboard.” What caught my attention were the separate LED modules in the…