1-Wire Thermocouple

1-Wire Thermocouple is a thermocouple to 1-wire converter board built around Maxim MAX31850 cold-junction compensated 1-Wire thermocouple-to-digital converter chip. The chip works only with 3.3V supply and logic level and there is on-board 3.3V LDO regulator and level converter for compatibility with 5V based 1-Wire networks. Due to the level shifting of the 1-Wire signals the only powering option is via 5V supply i.e. using parasite power is not supported.

Features

  • 1-Wire device: Maxim MAX31850
  • Thermocouple type: K (other types are supported by specific chip from the same family)
  • Resolution: 14-bit, 0,25°C
  • Temperature range: -200°C to +700°C
  • Accuracy: 2°C
  • Supply voltage: 5V
  • Parasite power: not supported
  • 1-Wire logic level: 5V
  • 1-Wire connector: RJ12 or RJ45

Resources

Credits

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 19€ 

TaaraNode Ethernet Proto

TaaraNode Ethernet Proto is JeeNode and Arduino compatible Open Source microcontroller board with on-board ENC28J60 Ethernet controller, MAC chip and RFM12b radio transceiver. The board is software-compatible with JeeNode Ethernet Card and JeeLabs example sketches will work.
MAC address EEPROM is supported via customized UNIO library.

Features

  • Microcontroller: Atmega 328P
  • Ethernet Controller: Microchip ENC28J60
  • MAC address EEPROM: Microchop 11AA02E48
  • Radio transceiver: RFM12b (868Mhz/433Mhz/915Mhz)
  • Serial interface: FTDI (3,3v logic level)
  • SPI/ISP header: yes
  • JeeNode style ports: 2
  • Passive POE: default
  • Power input: 5-16 V DC (LDO, default) or 4.75-34 V DC (DC/DC, optional)

Resources

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 50€ 

1-Wire Humidity and Temperature sensor

1-Wire Humidity and Temperature sensor is a low-cost Open Source device for measuring temperature and relative air humidity in 1-Wire micro LAN network. 1-Wire network allows multiple devices connected on the same bus in parallel. Every 1-Wire device has a unique 64bit ID.

Features

  • 1-Wire device: Maxim DS2438Z+ ADC with internal 13-bit temperature sensor
  • Humidity sensor: HIH-5030 or HIH-5031 (condensation-resistant)
  • Supply voltage: 2,7-5,5V DC
  • Conformal coating option adds some additional protection against moist air
  • Wiring on the full set model with the RJ12 plug (compatible with Maxim DS9490R USB to 1-Wire adapter):
    1 – VCC (yellow)
    2 – NC
    3 – OW 1-Wire data (green or blue)
    4 – GND (red)
    5 – NC
    6 – NC (black or none)

Resources

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 46€
  • Full set: 51€ 
  • Conformally coated full set 54€ 

NB! The price of main parts has increased significantly due to the chip shortage. Our prices are adjusted accordingly.