problem with 9V AC rectifier

[Dimitree]

hi guys
I built a small circuit that I need to get 5V DC out of a 9V AC power supply (like those used by Line6 for example).
The schematic is pretty easy: a bridge rectifier W06M, then a 1000uF/35V electrolytic cap, a 7805 followed by 47uF + 0,1uF on the 5V output.
the problem is this: when I connect this circuit to a load (another circuit) the voltage is correct (5.10V DC), but after a while the 1000uF cap and 7805 become really hot and suddenly the circuit connected stop working.
what's the problem, in your opinion? I replaced the 1000uF cap and 7805, but the same thing happened. Should I replace everything and try again?

[amptramp]

What current are you pulling out of this circuit?  The 7805 has an internal thermal shutdown, so it may stop working for that reason and may not be damaged.  The capacitor getting hot would only occur with input capacitor failure (which would probably kill the regulator because the main series pass transistor would have reverse voltage on it) or excessive current drain.  Before trying again, determine what the actual load is.

[Dimitree]

the load is not a problem because I didn't have any problems when using the prototype of this circuit on breadboard

the only difference between the prototype and the pcb-circuit is the bridge rectifier used. is a W06M wrong for that?

[Paul Marossy]

The W06M looks to be way overkill for the voltages you're using. I would think it's not the cause of your problem. Are you sure that how you built your circuit really is how you had it breadboarded?

[Dimitree]

thanks for the help

I noticed a led in the "slave" circuit was connected in the opposite direction, could it be the reason of that?
now I bypassed the 1000uf and the bridge rectifier, and powered the thing going directly to the 7805 with a 9V DC power supply. Everythign is working fine now that I reversed the led. BUT do you think the led was the problem? if so, I could try to connect 9V AC again.

[Paul Marossy]

Sounds like that might have been your problem to me it if works fine now.