I am trying to make a 5V LED using an 18650 battery.
It's easy to use the auxiliary battery, but I want to make it neatly charged.
I am trying to do my first DIY. The purpose of DIY is a photoluminescent device for octopus.
I thought I could just use the 5-pin terminal to charge with TP4056, but the battery voltage is 3.7V.
I am trying to use the MT3608 which can be changed to 5V.
Can I connect it like the picture I made???
Just change the position of the switch in one place
If you connect the battery directly to the booster circuit, the battery will be discharged.
Basically, even if the switch is turned off, the current consumed by the booster circuit continues to be consumed.
The total LED current only needs to be limited so as not to exceed the maximum output current capacity.
Of course, you can set the output voltage to 5V with a tester before connecting the load LED and connect it.