So far I have successfully completed the AMP3 kit and it works great. Thank you!
But I have tried building two AMP1 kits and neither is working yet.
If you could help me I would really appreciate it.
I tested my 5V source and it works perfectly. My 5V souce is a 7805 chip connected to a 12 volt power source.
My main power source is two 32V lithium battery packs.
When I connect all the connections and mute the amp, nothing happens. When I unmute the amp, my 5v 7805 regulator chip gets very hot. The current through the 5v is about .5 amps. This amp doesn't produce audio. HMUTE is HIGH. The TA2022 is not hot.
I may have damaged this amp when I initially connected the negative rail in reverse. This blew my fuse instantly, but perhaps it blew the chip too?
When I connected all the connections and muted the amp, nothing happened. Then I connected the speakers and unmuted the amp. I heard a small thump in the speakers. I pressed play on my iPod and turned the volume low. It played music very low for about 20 seconds then stopped. The TA2022 chip was very hot but not smoking or exploded. I added a heat sink and tried again.
This time, I connect every and turn to mute. The AMP1 makes a whistling sound and gets hot. When speakers are not connected, there is no whistling sound and the chip doesn't get hot. HMUTE is HIGH.
When I unmute the amp and turn on the source, the speakers make music, but it is very low volume. Then the TA2022 gets hot. I switch off the main 30v rails and leave the 5v source on. The chip still produces audio
The instructions mention an LED, but I can't see where this is mounted.
Am I supposed to do any shared grounding of my input, 5v, or power source? Or does the AMP1 board handle all of that?
I would really appreciate your help. Thanks,