This is the simple digital counter circuit, the IC application number 4029 from binary data, and then sent to the IC number 4513, a driver IC 7 Segment, to show off a digital number from 0 to 9.
When entering into a pulse signal input pin 15 of IC1, it will signal to the output signal is Binary.Then send the output from the pin Q0, Q1, Q2, Q3, and the pin. 6, 11, 14 and 2 of IC1.Go to the input of IC2 No. 4513. Which is IC displayed by the decoder signal to the Binary LED display with a 7 or the 7 Segment, will be displayed from a digital number from 0-9.
0-99 Two Digit Counter By IC 74LS48 , 74LS90
This is circuit 0-99 Two Digital Counter.
use IC TTL Digital IC 74LS48 x 2 to LED 7 segment Display,
and 74LS90 x 2 for Decade and Binary Counters.
Input Clock pin 14 from IC 74LS90.
Here is circuit use power supply 5V.