I am making a simple BCD to 7 segment decoder but for some weird reason, the ICs I am using, 7432 and 7408 are not working properly.
My 7408 ICs (all 5 of them) are always producing high outputs, regardless of the inputs. While my 7432 ICs (again, all 5 of them) are acting like AND gates, i.e. only producing high output when both inputs are also high. I am using a 9V battery to power the circuit. Pin 14 of the ICs are connected to positive and pin 7 are to connected to negative.
Are my ICs broken or have I done something wrong in my circuit that I failed to notice?