81 LED Chaser using double 4017
You can order this PCB from PCBWay:
https://www.pcbway.com/project/shareproject/W158454ASH1_Gerber_81_LED_MATRIX_20180721093541.html
Circuit and parts list: https://mousa-simple-projects.blogspot.com/2018/09/81-led-chaser-using-two-4017-ic.html


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