8 pins control the individual segments (seven segments plus the decimal point).Ĭonnect the four digit pins with four limiting resistors in series to any digital or analog pins. Digit pins are connected to the cathodes for common cathode displays, or anodes for common anode displays. There are 4 digit pins and 8 segment pins. You may need more pins if your display has colons or apostrophes. Hardware SetupĤ digit 7 segment displays use 12 digital pins. It also has character support including letters A-F and many symbols. ![]() It works for any digital pin arrangement, common anode and common cathode displays. ![]() This library allows an Arduino to easily display numbers and characters on a 4 digit 7-segment display without a separate 7-segment display controller.
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