In the second circuit, I have interfaced a 4-digit 7-Segment Display to 8051 Microcontroller and the display type is of common anode. The 7-Segment Display is of common cathode type.Ĭircuit 2: Interfacing 7 Segment Display to 8051 (4-Digit – CA)
In the first circuit, I am interfacing a Single Digit 7 Segment display with 8051. Circuit Diagram Circuit 1: Interfacing 7 Segment Display to 8051 (Single Digit – CC)
In the first circuit, I will interface a Common Cathode Single Digit 7 Segment Display to the 8051 Microcontroller while in the second circuit, I will interface a Common Anode type 4-Digit 7-Segment Display to the 8051 Microcontroller. Below figure shows the internal connections of seven segment Display. In common anode, seven segment display all the anodes are tied together and cathodes are left freely. In common cathode, all the cathodes of LEDs are tied together and labeled as com. Important Related Post – Water Level Indicator Project Complete Documentation Generally seven segments are two types, one is common cathode and the other is common anode. In these LEDs, 7 LEDs are used to indicate the digits 0 to 9 and single LED is used for indicating decimal point. Seven segment displays internally consist of 8 LEDs.
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