Quelltext der Seite HackFFM-Duino Chime


== Motivation ==
[[Benutzer:LeandraChristine|LeandraChristine]] needed a small solution for a project. Since I was designing lots of PCB’s anyway I decided to also realize this one.

Its es ment to be used with the [[SimpleSDAudio]]-library from [[Benutzer:Tut|Tut]], who helped quite a lot with the circuit design in this project.

The board is carrying:
Atmega328
MAX9098306 3.7W stereo Class D amplifier
SN74LVC2G14 dual Schmitt-Trigger with its own low noise power supply
microSD-Card Slot
74LVC1G53DP Analog Switch, to set the gain of the Class D amplifier (3 levels)


The controller itself is running on 3.3V (because of the SD-Card). The supply voltage is 5V.

== License ==