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.
Circuit 2: Interfacing 7 Segment Display to 8051 (4-Digit – CA).Circuit 1: Interfacing 7 Segment Display to 8051 (Single Digit – CC).
