Onsite Weather Logger/Propeller

(OWL3pro)

  • Parallax "Propeller" microcontroller
    • 32 bit, 8 core
    • capable of mulitple simultaneous threads for sensor and communications interface and data processing
    • multiple clock speeds, 80Mhz for high speed down to 20kHz
    • 20µA for long battery life
    • 64kbyte eeprom program and data memory.
    • serial programming and debugging
    • library programming objects, see obex.parallax.com
  • 8 channel, 16 bit analog to digital converters
    • suitable for thermocouples or other low level measurements.
    • single ended or differential down to 0.256V up to 3.3V full scale.
    • on-board reference temperature sensor.
    • 8 channels single ended, 4 differential, or combination of the two.
  • 5ppm temperature compensated real time clock
    • battery backed scratchpad for memory and alarms
  • 3.3V power
    • also switched power for external sensors and SD card
    • 1st level I/0 protection
  • General purpose input/output interface from microcontroller
  • I/O protected by 220 ohm resistors from miswiring and short circuit.
  • 2RS232 system interface
    • just like a standard Propellor, addressed as P30 and P31
    • also used as programming port, just like any other Propellor.
    • Built-in attention capacitor.
  • Real time clock with embedded crystal
    • ISL12020M keeps accurate time from seconds to years
    • ± 5ppm accuracy
    • lithium cell backup, included, keeps clock running for 10 years even when the main power is disconnected, automatic power switching.
    • On board temperature measurement can be used for software error correction.
  • Main OWL3pro accessories
    • standard SD card via stacking circuit board.
    • on board socket for XBee wireless.
    • breakout terminals and headers.
    • i2c LCD screen and button module.
    • enclosure and mouting options.
    • Li-ion battery and charger
    • apllication programming
2229 5th Street, Berkeley, CA 94710 • (510) 848-5725 •