Andy Belov
Well-known member
I have added a guitar input to the Audio Board (rev. D). It's based on TS922 op amp.
I put a capacitor on the preamp output, 10uF was all I had, just before connecting it to the Line In of the Audio Board, in parallel with the line input jack.
I works, but when I plug my phone into the line in jack, the guitar volume drops about 30%.
Do I need to add caps to the line in jack? What capacity should I use for both?
Also, I'm going to make it all as an SMD board. How do you pick the footprint for all resistors and capacitors?
On Paul's Audio Board I see them being smaller and bigger. How do you know the size?
Thanks.
I put a capacitor on the preamp output, 10uF was all I had, just before connecting it to the Line In of the Audio Board, in parallel with the line input jack.
I works, but when I plug my phone into the line in jack, the guitar volume drops about 30%.
Do I need to add caps to the line in jack? What capacity should I use for both?
Also, I'm going to make it all as an SMD board. How do you pick the footprint for all resistors and capacitors?
On Paul's Audio Board I see them being smaller and bigger. How do you know the size?
Thanks.