1. George Dimitoglou, Peter O’Connor, Mickayla Bachar
Logger Assembly
George Dimitoglou, Peter O’Connor, Mickayla Bachar

2. Logger On-Board Components
SD CARD
adapter
Trinket
DC Power Jack
Internal Temperature
Sensor Switch
ChronoDot
External Temperature
Sensor Switch
External Sensor Audio Jack
Internal Sensor Audio Jack

3. Drop-in Pieces

4. Trinket Microcontroller 8MHz or 16MHz Controls the operation of Logger
Gets temperatures from ChronoDot
Writes temperature to SD card.

5. ChronoDot ChronoDot CR1620 - CR1632 batteries
Over 3 months of service life.
Sends observations to Trinket
Set to UTC time zone.
Collects observation every 10 minutes.

6. SD CARD
SD Card
Holds Micro SD cards.
Includes SD cards 4gb-64gb

7. Plug-ins
Power
Internal Temperature Sensor
External Temperature Sensor

8. Sensors Internal Temperature Sensor External Temperature Sensor
For use in submersible loggers.
Ranges: -40°C to +125°C
Accuracy: ±0.25°C
External Temperature Sensor
For use in weatherproof loggers.
Ranges: -55°C to +125°C
Accuracy: ±0.5°C

9. LED’s IF Then Fix Green LED is on and red LED is off,
The ID.txt file was not found
Create a ID.txt file on the microSD.
Green LED is flashing and red LED is off,
The external sensor is not connected.
Make sure to properly insert the sensor.
Green LED is off and red LED is flashing,
The ID.txt file could not be opened.
Delete the current ID.txt file and replace it.
Both green and red LED’s are flashing
SD card could not initialize.
Be sure to properly insert the micro SD card.
Green LED is off and red LED is on,
The Data.csv cannot be opened.
Delete the current Data.csv and rerun the logger.
Green LED on and red LED is on,
The battery on the device is low.
Replace the batteries.

10. Advanced: Switches and their Settings
ESW ISW
Left Right Internal On
Right Left External On
Right Right Error: default Internal
Left Left All off