I'm building a project where I use an ESP8266 module to control a LED with my smartphone. For my project I want to battery power the ESP8266 and the LED so I'm using two Lithium Ion batteries. I've designed a circuit which works but I was wondering if there are more efficient ways of powering this circuit because I'm currently using a step down module in my circuit to power the ESP8266. Everything works perfectly but I don't think I've come up with the best circuit for this project
I know the driving circuit part for the LED is not the most efficient but I've already asked a question about that on this forum to help me fix that. The problem I have now is that I'm wondering if there's a need for a step down module to power both the LED ( LED is a 3 watt power LED) and the ESP8266. Are there any alternatives to this circuit that are more efficient? Is the step down module necessary?
P.S. I apologize for my drawing skills I'm not an electrical engineer so I'm not used to using the right symbols for everything