Why did you make it?

This circuit let for easy connecting electicaly not compatibile chips whatever interface they have. Low voltage system can be supplied from translator PCB, thus only one power supply is needed. In example PCB can be used to connect low voltage microcontrollers to 5V sensor with I2C, SPI or UART interface.

What do you buy?

1 pc. RT-NVT2008 PCB

What is it?

This is a voltage level shifter/translator. It is capable of connecting the SPI/I2C communication buses with different voltages. I.e. you can connect the 5V logic Arduino to 3.3V/1.8V logic sensor (see related products).

This board has 8 bidirectional digital channels, SOT23-5 LDO regulator for low side voltage and LEDs indicating supply voltages (low and high voltage).

RT-NVT2008 not only translates digital signal voltages, but also protects your board outputs against over current.

Related products:

LIS3LV02DL: 3 Axis MEMS Accelerometer Evaluation Board

LIS3DH: 3 Axis MEMS Accelerometer Evaluation Board

LSM6DS33: 3D MEMS Inertial Unit Evaluation Board

I3G4250: 3 Axis Digital Gyroscope Evaluation Board

What makes it special?

You can choose to solder the wires directly to the board or to use the pin headers.

PCB has slots for wire strapping that can be detached.

How it works?

RT-NVT2008 is bidirectional voltage level translator operating in a range: Vref(A) = <1.0-3.3>V and Vref(B) =<1.2;5.0>V with a minimal voltage difference: Vref(A) <= (Vref(B)-1).

Voltage conversion occurs without direction pin.

Vref(A) is powered from a LDO voltage regulator in a SOT23-5 supplied from the Vref(B) line. The LDO can be changed for any fixed voltage regulator with output voltage in an allowable Vref(A) range.

Pull-up resistors lets use the RT-NVT2008 for the I2C communication or with a open drain transmitter.

More one rt-nvt2008 product page (robothings.pl).

ASSEMBLY DRAWING

Mechanical Drawing