DOA 40DO

DOA_40DO

40 Channel Digital Output Daughterboard.

Features:

• 40 channels
• up to 125mA per channel (continous)
• up to 50V
• open collector outputs (sinking action)
• uses DOA protocol

Schematic and Layout

Rev.0 Schematic

Rev.0 Layout

Interconnection

Typical connection for 12 volt indicators with selftest

A note to DIYers

This board is so far one of the hardest for DIY. Lots of thin traces with spacings of often just 8mils. In addition, several wire bridges (for single-sided boards) / top side traces (for double-sided boards) are very close to IC pads. These facts make this particular board a challenge for people who are not regularly etching PCBs at home. For details, go ask on the PHCC forum.

Bill of Materials

see download page.

Eagle and Gerber files

see download page.