Breadboard, external power source

You connected the battery red wire to one of the strips on the breadboard. But there are no other wires connecting that strip to anything.

Incorrect. There is a yellow wire connecting battery positive to pin 8 of the 75441.

Marsha explained it in post #3.

OP: diagrams like this are why people despise fritzing crap. These are not schematics and they make the obvious obscure. They might be pretty pictures but they do not communicate well.