Motorcycle amp/cellphone/gps interface
Finally completed my motorcycle helmet amp thing
basic function
amp is sijosae ab 3 channel my current favorite.
tread type regulator with spst relay input protection need to keep as much voltage as possible.
5v regulator to charge phone ipod etc diode protection
3.5 mm input for ipod
2.5 mm jack for cell phone vox circuit overrides ipod through dpdt relay with 15 second delay
3.5 mm switched jack for gps pluging in disconnects 2.5 cell phone input. did not relay this takes to much space
used 6 pin cb connector 1 straight at amp 1 angle at helmet for cable
bare circuit board

all hooked up


the helmet Nolen n100e had a j&m intercom before i got it

Ksc75 Kramer modded sounds real good. area behind and around drivers is open on this helmet its made for intercom units

Custom 2.5 mm jack with nextel ptt

Helmet cable
