I've made 4 bit adder circuit using 4008 IC. And the sum output of the two 4 bit numbers from that IC was feed to one BCD to 7 segment decoder (74LS47) so that I can get decimal output. But since I can't diplay numbers over 9, I need two 74LS47 ICs. But what additional circuitry shall be made so that it can stop that overflow over decimal no. 9? And suppose my two binary numbers to be added are 101(5) +101(5) I will get binary output of 1010(10). How can I display this using two BCD to 7 segment decoder ICs?
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