LetsMakeRobot

SD log shield with RTC and a square pads prototyping area for Arduino

SD Card support

• Allows backup of a large amount of data on SD card and PC retrieval
• Support SdFat library for SD FAT16/FAT32 SC/HC cards
• 3V3 regulator on the shield

Real Time Clock

• Adding date and time data based on the component I2C DS1307
• Support the standard library DS1307
• Date accessed using the format year / month / day of week / hour / minute / seconds
• Time adjustable 12h with info AM / PM or 24H
• Backup Time on lithium battery (lasting 10 years if 48mAh)
• Corrections leap years, months with less than 31 days
• SQW output signal (square wave) Programmable 1Hz (for pulse every second, or 4kHz or 8kHz or 32kHz)
• Clock not subject to bug date before 100 years

Technical Specifications

• Receiver Type: L1 C/A code, 65-channel Venus 6 engine.

Accuracy

• Position: 2.5m CEP
• Velocity: 0.1m/sec
• Time: 60ns

Startup Time:

• 1 second hot start under open sky
• 29 second cold start under open sky (average)
• Reacquisition: 1s
• Sensitivity: -161dBm tracking

• Update Rate: Supports 1 / 2 / 4 / 5 / 8 / 10 Hz update rate (1Hz default)
• Dynamics: 4G (39.2m/sec2)
• Operational Limits: Altitude < 18,000m or velocity < 515m/s
• Serial Interface: 3V LVTTL level
• Protocol: NMEA-0183 V3.01 GPGGA, GPGLL, GPGSA, GPGSV, GPRMC, GPVTG*1 9600 baud, 8, N, 1
• Datum Default: WGS-84
• Input Voltage: 3.0V ~ 5.5V DC
• Input Current: ~33mA tracking
• Operating Temp: -40oC ~ +85oC
• Storage Temp: -55 ~ +100oC
• Humidity: 5% ~ 95%