DC 5V to 3.3V Buck Module & Base Resistor Logic level converter for Arduino

Description: 

 

1 On board DC 5V to 3.3V DC-DC Step-Down Power Supply Buck Module,IC AMS1117-3.3;

2 On board 8 channels 5V to 3.3V(also 3.3V to 5V) Logic level converter,base Limiting resistor ;

3  Arduino Breadboard friendly;

4 PCB size:25* 15mm 

 

Level conversion principle:

Between 5V and 3.3V level plus 470 ohm current limiting resistor, to avoid being burned of 3.3V port.

So, when the LOW side no-load, HIGH side plus 5V level,LOW side test is still at 5V level，vice versa.

This is a normal phenomenon, not the level conversion function does not work.