Sparkfun MP3 Trigger Board

I started working on the sound system for R2. First I needed to solder some pins for the power (right) and the 12 connecting pairs (left) for the remote receiver that will trigger each sound. The soldering went smoothly and initial tests are positive.

Here is what the MP3 trigger board will look lke when it is in place. The power connects to a 9V source on the right. The output to the amplifier is on the bottom and the top holds the 2GB micro SD card with the sounds files. I used a hard drive IDE cable for the left side, but I am only using 24 of the 40 pins. This method reduced the amount of soldering required.

More sound system progress.

Tonight I soldered on the small board for volume control onto the amplifier board. I also soldered on the power connectors (red & black) near the top. The whole thing was then screwed into place inside if R2's body. I should be able to do a sound test after I hook up all if the power.