I had an idea to build an A/D circuit where an analog voltage is converted
to digital, then displayed on a seven segment display - similar to a volt
meter only I'm manually inserting voltage.

My basic idea is simple but I'm having problems with it. Currently I have 15 volts going through a pot, into a unity gain op-amp, and into an A/D.

My resolution (at the moment) is not important, however, I'd like to display one digit after the decimal point.

I believe I need to add 6 to any number over 9 to allow for a carry, but I'm unsure how to achieve it. I guess I'd need a logic circuit to determine if the number is beyond 9, then an adder, and then a binary to seven segment chip?

TIA

My basic idea is simple but I'm having problems with it. Currently I have 15 volts going through a pot, into a unity gain op-amp, and into an A/D.

My resolution (at the moment) is not important, however, I'd like to display one digit after the decimal point.

I believe I need to add 6 to any number over 9 to allow for a carry, but I'm unsure how to achieve it. I guess I'd need a logic circuit to determine if the number is beyond 9, then an adder, and then a binary to seven segment chip?

TIA