Guys anyone please help me. I am doing with a project that connects a bluetooth module to the arduino UNO r3 but my bluetooth module can only accept 1.8v (Integrate 3V, 1.8V LDO and Switching mode regulator) (http://www.datasheetspdf.com/PDF/IS1685S/938444/7) datasheet for my bluetooth module. and my arduino has only 5v out and 3.3v output. how can i "safely connect" these wires so that i will not damage my components ? i have a lot of resistors here but i dont know what to use. please help me. here are some pictures (https://ibb.co/jA3HXQ) (https://ibb.co/nnrAmk)

 

I think you should read this, it uses the HC-05 module:
https://arduino.stackexchange.com/questions/19517/hc-05-bluetooth-module-inq-command-doesnt-work

 

UPDATE ! now I bought HC-05 bluetooth module because you guys technically preferred to it. but anyways since I already have one, how am I gonna "safely" connect this to my arduino? like i said i have a lot of resistors (complete like 3 cabinets full of resistors). I don't know anything about this module please help me. I hope my resistors this time could help. ------> https://www.elabpeers.com/bc417-bluetooth-to-serial-arduino.html (matched on my module). Here is a picture ---> https://ibb.co/hc4peF https://ibb.co/gy1D6v

THANK YOU SO MUCH GUYS FOR THE PREVIOUS REPLIES APPRECIATED SO MUCH

 

Only I replied so hc-05 is my opinion, but you will find how to connect the pins to arduino in the link i gave you and in the datasheet.