Upgrading a Cosmic Array detector element for standalone use.

Recently I upgraded a Cosmic Array detector element for standalone use. This includes replacing the Raspberry Pi Zero W with a full Raspberry Pi 3B for faster processing speed and improved audio. 

Original unit used in Cosmic Array installation.

Wiring was improved to reduce noise and GMT cables were replaced with HV Teflon coated RG178 coax to reduce false muon counts. With the addition of external connectors for access to electronics including RPi3 USB, LED Driver, DC Power and direct Audio out from RPi3.

Inside unit with upgrades

Operating detector with upgrades 

In the original concept of this detector I planned to drive acoustic instruments from the output of the detector. But due to budget and time constraints a raspberry pi zero w was chosen to play wave files. Consequently it is design to drive solenoids or contractors directly.  This modification allows the user to  drive anything from large gones to glockenspiel to other electronic or midi devices.     

Note each LED output driver pulls low to 0V/Ground.