design:

I found an attenuator board on ebay for less than 10 dollar.

My idea was to control this board over I2C so I could connect it to my I2C PLL controller or from another I2C micro controller board.
I designed a small board with an I2C to I/O converter (PCF8574).

ATT board with ATT

Connections:

ATT board connections

Downloads:

Eagle schematic file
Eagle board file

Copyrights:

All software is distributed under the GNU/GPL licence.
All hardware and designs are distributed under a Creative Commons license Attribution-ShareAlike 2.5.