1-Wire Shield for WeMos D1

April 22, 2018 |   |  Comment  |  1-Wire, Wifi

1-Wire Shield for WeMos D1 is 1-Wire to i2c bus converter board based on Maxim DS2482-100 Single-Channel 1-Wire Bus Master chip. It is used to off-load the time critical 1-Wire waveform generation from the MCU to the 1-Wire Bus Master to achieve error free operation with longer 1-Wire bus situations. Board header layout is compatible with WeMos D1 mini microcontroller boards. There is on-board strong pull-up mosfet and the level converter for 5V to 3.3V i2c interface.

Features

  • 1-Wire device: Maxim DS2482-100 Single-Channel 1-Wire Master
  • 1-Wire connector: RJ45 (RJ12 or 3-pin 3.5mm screw terminal on request)
  • Supply voltage: 5V from WeMos D1 board
  • i2c logic level: 3.3V
  • 1-Wire logic level: 5V
  • Strong pull-up capability

Resources

Credits

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  • Bare PCB: 3€ 
  • Pre-assembled: 17€

 

1-Wire Temperature, Humidity and Light Sensor

November 20, 2016 |   |  10 Comments  |  1-Wire

1-Wire Temperature, Humidity and Light sensor uses one DS2438 1-Wire chip for three different measurements. This board is very similar to the 1-Wire Humidity and Temperature Sensor – even the board size is the same. The only difference is added BPW 35 S photodiode from Osram and the current sense resistor for light level measurements. The actual calibration (if needed) should be done in the software or by replacing the current sense resistor (default 4.7k 1%, before nov 2018 it was 240Ohm).

Features

  • 1-Wire device: Maxim DS2438Z+ ADC with internal 13-bit temperature sensor
  • Humidity sensor: HIH-5030
  • Silicon PIN Photodiode: BPW 35 S
  • Supply voltage: 2,7-5,5V DC
  • Wiring on the full set model with the RJ12 plug (compatible with Maxim DS9490R USB to 1-Wire adapter):
    1 – VCC 5V (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: 52€
  • Full set: 57€ 

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

 

1-Wire Passive 5-port HUB

November 12, 2015 |   |  Comment  |  1-Wire

A simple 1-Wire Passive 5-Port HUB with five RJ-45 sockets connected in parallel on a small board with two 3 mm mounting holes, black soldermask and white numbered labels.

Features

  • RJ45 sockets: 5
  • Type: parallel
  • Panelization: 4 boards on panel, not v-grooved

Resources

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  • PCB panel: 10€ 
  • Pre-assembled: 15€ 

1-Wire Slave i2c bridge Plug

October 19, 2015 |   |  Comment  |  1-Wire, TaaraNode

The main purpose of DS28E17 device and this board is to use i2c slave devices like sensors and low power microcontroller boards over much longer 1-Wire networks.

1-Wire Slave to i2c bridge Plug consists of DS28E17 chip, an on-board 3.3V LDO regulator and 5V to 3.3V level shifter for interfacing 3.3V DS28E17 device with 5V 1-Wire bus. There are also three optional LED indicators for debugging. The board layout is compatible with TaaraNode and JeeNode boards but can be used with any other 3.3V low power microcontroller board or i2c device.

Features

  • 1-Wire Slave to i2c bridge device: DS28E17
  • Supply voltage: 5V from 1-Wire bus
  • 1-Wire logic level: 5V
  • i2c logic level: 3.3V
  • On-board 3.3V regulator
  • LED indicators: BUSY, ED (Error Detected) and XD (Expecting Data)
  • Headers: 0,1″
  • 1-Wire connector: RJ45 or RJ12

Resources

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 20€ 

1-Wire Plug

January 22, 2015 |   |  Comment  |  1-Wire, TaaraNode

1-Wire Plug is 1-Wire to i2c bus converter board based on Maxim DS2482-100 Single-Channel 1-Wire Bus Master chip. It is used to off-load the time critical 1-Wire waveform generation from the MCU to the 1-Wire Bus Master to achieve error free operation with longer 1-Wire bus situations. Board header layout is compatible with TaaraNode and JeeNode microcontroller boards. There is on-board 5V LDO regulator, strong pull-up mosfet and the level converter for 5V to 3.3V i2c interface.

Features

Resources

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 15€ 

1-Wire Counter

January 22, 2015 |   |  Comment  |  1-Wire

1-Wire counter is a small board for DS2423P 1-Wire RAM with counter chip. This device is unfortunately no longer in production but is still available from HobbyBoards. Only one counter input has broken out and there is a place for pull-up or pull-down resistor. This board is designed for electric energy consumption measurement with optical digital pulse sensors via 1-Wire network. Small board dimensions allow it to be used as a “in-line” converter connected between pulse sensor and 1-Wire cable.

Features

  • 1-Wire device: DS2423P
  • Supply voltage: 5V
  • 1-Wire connector: 3-pin 0,1″
  • Pulse sensor input: 3-pin 0,1″

Resources

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  • Bare PCB: 3€ 

1-Wire Thermocouple

January 22, 2015 |   |  Comment  |  1-Wire

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€ 

1-Wire Humidity and Temperature sensor

January 22, 2015 |   |  34 Comments  |  1-Wire

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: 48€
  • Full set: 53€ 
  • Conformally coated full set 56€ 

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