Arduino Compatible 4 Digit 7 Segment Display Counter (0000-9999) 4 Digit Arduino based counter is simple project using 4-digit 7 segment common cathode display, Atmega328 chip on board and 2 tactile switches. Projects works with 5V DC. Onboard connector helps to program the Arduino code and boot-loader Arduino stair led light using 10 ledS 2 tactile switches I have tested

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