Hi Robotmaker 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

http://www.sparkfun.com/products/11029

@robotmaker

On the application schematic shown on the PDF for the an6884 chip the audio would hook to the 2.2uf capacitor?

@rgordon yes,that is where the audio goes

@bravia you need a audio boost amp,mostly all it is a gain amp using a chip and few resistors

Thanks. I am ordering the chips today.

@robotmaker

On an earlier thread in the Hardware section of this forum I posted a link to a site that talks about controlling dc gear motors like a servo. Turn DC Gear Motor into servo

Do you have a step by step tutorial for something like this?

@RGORDON not really good at that,but pretty simple made so many of them ,all you need is servo board from a cheap FUTABA S3003 FROM china,remove the motor and pot and add your own motor and pot a attached to motor,now if need more ams then the chip on S3003 ,take 2 chips and add together in parallel if need more cicuit use a h-bridge,if you have problems wiring the h-brigge i can help you

@ Bravia,

Sparkfun has some.....are these still too little gain?

Audio Amp

If they are too weak... look into some car electronics boosters. I have line level audio signal booster I bought from Radio Shack several years ago, 12V Power supply of course but works pretty good. I think it was less than $20.

v/r

Kevin

KEVIN thats not what he is looking for ,most stereo iputs are 1 k impedance and speakers are 8 oms so you need a matching trasfomer 8 ohms to about 1k radio shack has one for it,i alsmost forgot about it audio matching transfomer

it matches speaker to audio input if stereo you need 2 ,one for each speaker