As you increase the value of resistor brightness of display decreases. Following figure shows the pin configuration of 7 segment display-įig. Now suppose you want to display numeric “4” than from figure 1, segment which are used to make “4” are as follows “f”, “g”, “b”, “c” and from above “f” represent pin 9. Similarly “g” represent pin 10, “b” represent pin 6 and “c” represent pin 4. So connect pin 9, 10, 6 and 4 to supply with the help of 220E resistor and ground DP pin 3 or 8 as both are internally connected to each other. Now suppose you want to display alphabet “L”. then segment which you require to glow from figure 1 is “f”, “e”, “d”. Therefore you have to connect pin 9, 1, 2 to supply and ground pin 3.
Similarly you can display more alphanumeric on 7 segment display.Ģ. Common anode display– In this positive pin of all 8 LED’s connected together and negative leads are used as display pin’s.
Always remember to use resistor with individual segment. Now suppose you want to make numeric “2” than segment which we have to use from figure 1 is “a”, “b”, “g”, “e”, “d”. Therefore we have to connect pin 7, 6, 10, 1, 2 to ground and provide power supply to pin 3 that is DP pin.Īnd you want to make letter “n” than connect pin 1, 10, 4 to ground with the help of resistor and provide power supply to pin 3. Now try to make your own alphanumeric display according to the requirement. In above picture you can see that we have used both common cathode and anode display to display “A L L”.
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