20 Pcs 3.3V 5V TTL Bi-directional Logic Level Converter For Arduino

in this video I'm going to show you how we can use this logic shifter module this module is used if we have to interface 5 volts from this Arduino board in which the pins are all 5 volts to some modules that requires 3.3 volts like this sh t 21 temperature and humidity sensor which operates on 3.3 volts this will be handy on that on my application I will not use that sensor the temperature limited sensor but this module that I have here which is a blood pressure monitor sensor I already have the lines ready the negative positive the SDA and SEL which are I squared C lines that's why this will be handy because I squared C bizarre bi-directional you use this level shifter if you need a bi-directional lines if not a voltage divider from your 5 volts to 3.3 might be enough you will connect the ground here which is the negative and the LV for the positive that's L D stands for low voltage th