Connecting a 7 Segment LED Display to ICL7107

Connecting a 7 Segment LED Display to ICL7107

Here is a diagram showing how to wire a single seven-segment LED display to the ICL7107. The same principle applies to the rest of the remaining LED displays, and below is a table showing the mapping between all the pins of the seven-segment display and the ICL7107 chip.

return
LED Display ICL7107
Segment LED Pin No Pin No Pin Designation
Display 4 - 10 20 POL
c 4 19 AB4
b 6 19 AB4
Display 3 g 10 22 G3
f 9 17 F3
e 1 18 E3
d 2 15 D3
c 4 24 C3
b 6 16 B3
a 7 23 A3
Display 2 g 10 25 G2
f 9 13 F2
e 1 14 E2
d 2 9 D2
c 4 10 C2
b 6 11 B2
a 7 12 A2
Display 1 g 10 7 G1
f 9 6 F1
e 1 8 E1
d 2 2 D1
c 4 3 C1
b 6 4 B1
a 7 5 A1

Here is the complete wiring table that maps the pins on the LED display modules with the pins on the ICL7107 chip. Pin 8 and pin 3 on all the display modules join to Vcc, and the decimal point is pin 5 on all modules.