@robotmaker,

I must be missing something from above then....I thought he was going from line level out on MP3 trigger into another amp (should be same impedence)....Bravia is saying the line level out on the MP3 Trigger is too weak..and as you say above....he needs an 'audio boost amp'.

Boost Amp

Also need to watch out for ESD...There is a guide on sparkfuns site to ensure you don't damage the MP3 Trigger as well called VS10XX AppNote: Connecting analog outputs

KEVI TJHS IS WHAT IT SAID

Looking for a circuit to give the the Sparkfun mp3trigger card a line output level, it comes with low level suitable for small speaker.I require the output to feed into a high power audio amp. Any assistance would be much appreciated. Thank you in Advance Pat

mptrigger has a 8 ohm output and wants to feed to amp with ik impedance ,to do that you need a coupling transfomer at 8 ohms to match the speaker output on the mp3 ,the 1k output to to a amp our your choice,so he needs a matching transfomer and amp like the one you listed,or there are many others on ebay.cant connect 8 ohms to it wont work that well.needs to me matched

also if you look at the vs10xx app note near the bottom they are using a 10 -1 matching circuit ,witch is also 8ohm to 1k matching transformer also specs on the transformer says 10-1

Re Sparkfun Mp3 Trigger My main concern is when I connect the card output to an external amp I have total isolation as there is an issue with GND ( The shell is connected to the GBUF line on the VS1053 Audio Codec Chip. GBUF is NOT ground and is biased at 1.25 volts (as well as the Left and Right outputs).
I was hoping to purchase a ready made adaptor,or would an independent power source to MP3 Card suffice. Pat

pat take a kook at the vs10xx app note it talks about using GBUF and you do need a isolation matching transfomer ,the GBUF goes to GND with a cap and also same with outputsf the mp3 board to transfomer

@robot maker Where in the docs did you find this has an 8ohm output? Trying to find the specs on the low level audio signal?

it says it takes a headphone input

@robotmaker I want to add cliff/edge detection to my Wall-E, i know i need Sharp IR sensor, but where to mount it, how do I connect to EZ-B and setup in ARC? Thanks

mount on bottom,measure the wall-e to floor and sensor you want at a angle like about 2 inches in front,doesnt meen to place the IR sensor in front just the detection light ,use adjustable digital IR MY AVATAR PHOTO above my name has some on brackets about 45 deg brackets,can see about getting a bteer photo of my IR for edge detection,then a simple script to control or stop motors