Tried connecting a 3.3V device to a 5V system, or the other way around? You should know the challenge it take. This Logic Converter will help you out esily. Small size yet it convert 5V signals to 3.3V and vice versa effectively and in high speed. This converter also works with 2.8V and 1.8V devices. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side. 4 channels for each site.

 

Another good feature is this converter is Breadboard friendly! Can be used with normal serial, I2C, SPI, and any other digital signal. Does not work with an analog signal.

 

The level converter is very easy to use. The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the 'HV' pin, low voltage (2.8V for example) to 'LV', and ground from the system to the 'GND' pin.