Serial OLED

Serial OLED is a small adapter board for cheap 128×64 0,96″ OLED i2c display module and it can be used as a serial console for microcontroller projects with 3.3V logic level. One of the four microswitches is hardwired as the reset for the Serial OLED board. Other three switches are connected to the digital pins of the on-board microcontroller. The additional FTDI connector (host) can be used to program the Serial OLED board itself.

There are two popular models of cheap 0,9″ OLED displays based on SSD1306 driver IC available on the ebay. They are slightly different size (27x27mm and 27x28mm) and the supply polarity is different. This adapter board fits both modules and the supply polarity for the OLED module can be set by the solder-jumpers.

Features

  • Compatible with 27x27mm and 27x28mm 0,9″ i2c OLED modules
  • OLED module supply voltage polarity set by solder-jumpers
  • Onboard Atmega-328p microcontroller
  • Logic level: 3.3V
  • Supply voltage: 5V
  • Reset switch
  • User assignable switches: 3

Resources

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 15€ 
  • Full set: 25€ 

FTDI Micro

FTDI Micro is simple USB to UART serial adapter based on FT232R chip. The board is pre-configured for 3.3V logic level but with the solder-jumper can be set to 5V logic level as well.

Features

  • Micro USB socket
  • USB UART interface chip: FT232R
  • Logic level: 3.3V default, 5V optional
  • USB port protection with polyfuse
  • TX LED: Red
  • RX LED: Green

Resources

Buy

  • Bare PCB: 3€ 

 

LCD Plug

LCD Plug is TaaraNode and JeeNode compatible i2c driver board for HD44780 based 16-pin LCD displays. This board is based on JeeLabs LCD Plug with additional Port header.

Features

  • Compatible with HD44780 based LCD displays
  • Interface chip: MCP23008 8-bit port expander
  • Default logic level: 3.3V
  • Optional logic level: 5V
  • Software controlled backlight: on/off

Resources

Credits

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 8€ 

 

RTD Plug

RTD Plug is TaaraNode and JeeNode compatible MAX31865 based SPI inferface board for PT100/PT1000 temperature sensors.

Features

  • RTD to Digital converter: MAX31865
  • Compatible with 2-, 3-, and 4-wire Sensor Connections
  • Interface: SPI
  • Supported sensors: PT100 (PT1000 option)
  • Supply voltage: 3.3V
  • Headers: 0.1″

Resources

Credits

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 24€ 

 

ESP8266 DHT22 Wifi Humidity sensor

Low cost Wifi Humidity sensor with ESP8266 Wifi module and DHT22 digital humidity and temperature sensor. The board has on-board 3.3V regulator and can be powered from USB charger with USB-A socket. All the pins of the wifi module have broken out to breadboard-friendly 0,1″ headers. Unused pin is connected to 5V input for easier progamming. There is also LED and a button for entering the program mode (hold down while power-up) which makes this board suitable for prototyping and developing apps for ESP8266 Wifi module. When the Wifi module is constantly in full operational mode (with HTTP server etc.) it gets quite warm and can affect the temperature and humidity readings. Keeping the sensor 3-4mm away from the board and/or putting the module in sleep will resolve this problem.

Features:

  • Wifi module: ESP8266-03
  • Digital humidity and temperature sensor: DHT22
  • Supply voltage: 5V
  • Program button
  • Status LED

Resources

Buy

  • Bare PCB: 3€ 

TaaraNode Mini

TaaraNode Mini is small Arduino software compatible microcontroller board with on-board RFM12b radio transceiver. TaaraNode Mini is very similar to the JeeNode but is much shorter and has an option to power it from CR2032 coin-cell battery.

Features

  • Microcontroller: Atmega 328P
  • Radio transceiver: RFM12b (868Mhz/433Mhz/915Mhz)
  • Serial interface: FTDI (3,3v logic level)
  • SPI/ISP header: yes
  • JeeNode style ports: 2
  • Supply voltage: 5-16V DC
  • Clock speed: 3.3V/16Mhz or 3V/8Mhz internal oscillator

Resources

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 20€ 
  • Pre-assembled without radio: 15€ 

Ethernet Plug

Ethernet Plug is small ENC28J60 based Ethernet controller board for TaaraNode and JeeNode microcontroller boards. Ethernet Plug operates entirely on 3.3V and has a on-board LDO regulator or DC/DC converter. The board can be powered either from microcontroller board it is attached to or via Passive POE. If the DC polarity from the PPOE may be issue there is also place for bridge rectifier which is bridged by default.

Features

  • Ethernet Controller: Microcip ENC28J60
  • Passive POE: default
  • Passive POE polarity auto-sense: optional
  • Supply voltage: 5-16 V DC (LDO, default) or 4.75-34 V DC (DC/DC, optional)

Resources

Buy

  • Bare PCB: 3€ 
  • Pre-assembled: 30€ 

 

TaaraNode Ethernet

TaaraNode Ethernet is a compact version of TaaraNode Ethernet Proto without two extra ports and prototyping area.

Bare PCB: 3€ 

Pre-assembled: 50€ 

1-Wire Plug

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

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

Buy

  • Bare PCB: 3€