I did just that.joan wrote: That aside.
I just had a look at the schematics.
If I had this device I would have connected it up as the OP indicated in the first post with one change.
On the jumper VCC/JD-VCC I'd connect 5V to JD-VCC rather than VCC.
I'd listen for the relays clicking before connecting to A/C though (and being timid I'd stand well back).
And.... it works like a charm. I can even get all four relays to flip on at the same time. I already ordered a ULN2003, so I guess I'll still put it in when it comes just to ease my mind and give my pi even more protection, but I just thought I'd let everyone know that it's working and it was enough to power all 4 relays without it or a 74HC14. Thanks for all the input and help everyone, I really appreciate it!