We released LCD Shield with SD Logger+ add-on for MyGeiger kit. SD Logger+ LCD Shield has same
dimensions as the regular MyGeiger LCD Shield. Instead of TRRS audio
socket it has micro SD card socket and TQFP-32 Atmega-328A processor
with preinstalled Arduino boot loader.
Because most of the operating time
Atmega328 enter idle sleep mode, the power consumption of whole
MyGeiger kit is still stay low as before. SD Logger adds only
1.5mA-2.0mA to the total kit consumption. When serial data is
transferred from the main PIC18F2550 uProcessor to the USB output,
Atmega328 enter active state for several micro seconds and writes
same data to the SD card. If SD card is missing, or if you do not
need SD log function, you can power down SD logger by removing LOG
JMP jumper.