LM3886 & PGA2310 issues

Xlrator · 7th March 2006, 07:25 AM

I built a kit from chipamp.com and it came out flawlessly. Has been working just fine until I tried to control it's volume with a PGA2310 that I had breadboarded. I am still working on the code so it hasn't been completely functional. But I was getting faint distorted signal when everything was turned on. Then it sounded like clipping.

So I reverted back to the dual gang pot to see if there was any permanent damage. It has a low distorted signal now. I re-populated that breadboard 3 times and know it was correct.

As I type this I am thinking it could be 2 things. Do the left & right grounds need to be isolated for this amp? Or the ±15v may have contacted the Vout. But not sure how that could effect both channels.

I have to take a break from this, it's been a long day.

Does anyone have any input?

7th March 2006, 07:25 AM	#1
Xlrator diyAudio Member Join Date: Jan 2006 Location: Illinois	LM3886 & PGA2310 issues I built a kit from chipamp.com and it came out flawlessly. Has been working just fine until I tried to control it's volume with a PGA2310 that I had breadboarded. I am still working on the code so it hasn't been completely functional. But I was getting faint distorted signal when everything was turned on. Then it sounded like clipping. So I reverted back to the dual gang pot to see if there was any permanent damage. It has a low distorted signal now. I re-populated that breadboard 3 times and know it was correct. As I type this I am thinking it could be 2 things. Do the left & right grounds need to be isolated for this amp? Or the ±15v may have contacted the Vout. But not sure how that could effect both channels. I have to take a break from this, it's been a long day. Does anyone have any input?

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