The BlueberryE Uno335 is a new Arduino Uno compatible board that has been created to provide an easy way to communicate with wireless 3.3v sensors.
The new BlueberryE board is fitted with a 3.3V levelshifter for I2C, SPI and SerialSRAM, and is detailed in the video below.
Features of the new BlueberryE Uno335 board include :
– The Uno335 is built based on an Arduino Uno R3 and inherits all the basic features that you love, including the completely same formfactor. Indeed you can use your Uno335 exactly as the original Arduino Uno by setting jumpers, but this is not the mode we have made the Uno335 for.
– Given the point above the Uno335 is programmed using the Arduino IDE. Download here.
– We added 512kbit serial SRAM to increase storage capacity. This memory will connect to the microcontroller using the SPI interface. A library will be provided to access the serial SRAM.
– I2C at 3.3V as many newer sensors just work based on 3.3V I/O we added the classical NXP circuit for levelshifting I2C at Pins SCL, SCA close to AREF. On A4, A5 still the regular 5V I2C interface is available, means you can use I2C parts at both voltage levels. Setting jumpers you can switch of the levelshifting.
– SPI at 3.3V we added a TI TXB0104 bidirectional levelshifter to the digital pins 10, 11, 12, 13 enabling the SPI interface at 3.3V. As the onboard serial SRAM is running on 3.3V as well, it uses the same levelshifter. To keep digital pin 10 (slave select) for external use we have a voltage divider on pin XXX that can act as slave select for the internal serial SRAM. Also these features can be enabled/disabled using jumpers.
Jump over to the Kickstarter website to back the project with pledges from as little as €11.
Source: Kickstarter
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