Electronic trigger

Job ID: 34734338

Budget: $250 – $750 NZD

I want to create an electronic trigger that is activated by an external source signal.
The signal is Manchester code delivered trough a 3.5mm audio jack. (LTC, the end of each frame is identified by a sequence of 12 consecutive highs)
The trigger only has to read the signal, display it on a small screen, and allow for a user selectable delay to close a circuit. The trigger will actuate a raspberry pi.
I am looking for someone to design and build me 2 or 3 physical triggers.