Hello everyone. I'm very new to diy audio and making amps and such, but i've decided to give it a go and try building a 2x22W stereo amp with the TDA1554 Chip. Now i have all the parts needed but i don't have a PSU yet. Since i don't have any money to buy a new one, i was thinking of using an old AC-AC converter i have. It converts 220VAC to 12VAC 4.2 amps. The circuit however, needs DC current and not AC and it needs 5 amps to operate on full power. Would this AC-AC converter i have work ? Is the current enough ? Also, how would i convert the 12VAC 4.2 amps to DC current ?