I recently finished a 4 bit adder project and I wanted to "extend" it.Right now,the output is represented by 4 led's(1 for each bit).I want to display the answer as a decimal in a seven segment display.The biggest value that the adder can output is 15(since it is a 4 bit adder).I have two single digit seven segment displays.I was thinking of using the 74ls47 chip to do the binary to seven seg conversion.Here is the datasheet for BCD TO 7-SEGMENT CODER/DRIVER
How do I check to see if the addition output is a double digit number?Using this information, how do I "tell" the binary to seven seg converter, that it is double digit?Do I need two of these chips?My final question is:the biggest decimal a single digit seven segment display can represent is 9. When the 74ls47 gets an input greater than this it starts display jibberish:( I got that information from Using the 74xx47 BCD to Seven-segment display.
How would I prevent the jibberish from getting displayed(basically I need a way to check if the output of the addition is 10 or greater.)
Sorry about all the questions this is the first digital logic circuit that I have made.