![]() This example uses a multiplexed display ( only 12 pins instead of 16 ) in the variant common cathode, ie the 4 pins for the 4 characters be connected to GND and the 8 pins for 7 segments and the decimal point on the stream. ![]() Numbers and - as far as this is possible with a 7 -segment display - Display letters on a 4- digit 7 - segment LED display, but the characters to be displayed via the serial interface are read. However, I use the code portions of the Library SevSeg Dean of Reading. ![]() This allows me to not only the usual numbers and letters spending (most anyway), which is not provided in the libraries in the normal case. ![]() ![]() Also on libraries I have omitted to understand better how the control of the display works. The first experiments with a 4- digit 7-segment LED display are a minimal variant without transistors, additional shift registers or ICs.
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