Sim800l module Power supply

[josephchrzempiec]

Hello, I have a sim800l module here. The Power supply it requires says 3.4v to 4.5v. Normally I can do a diode off of the 5v and bring it down to 4.7v which is not bad. however I do not have any diodes at the moment. I'm unsure on what I can use for testing to make sure this module works. Also I would use an 18650 battery which would give me at full max 4.2v. I currently don't have any. Is there another way I can give it power without killing it off or using 5v? I have resistors and capacitors of all kinds but that is all.

Joseph

[Wawa]

@josephchrzempiec

Normally I can do a diode off of the 5v

If you mean powering the module from the Arduino's 5volt pin, then forget about it.
The module requires 2 Amp peak during transmit, which is too much for any Aduino or USB.
A LiPo battery is the only way.
Go to a place where they recycle old cellphones. The LiPo batteries in them are usually ok for short-lived experiments like this (the module will soon be obsolete).
Leo..

[josephchrzempiec]

Hello wawa, I don’t have any old laptop batteries or lipo batteries at all.

[Paul_B]

Well, you are an old poster here, you should "know the ropes".

Just put it way until you can get what is needed.

@Wawa

The LiPo batteries in them are usually ok for short-lived experiments like this (the module will soon be obsolete).

That is one way to put it.

[josephchrzempiec]

I know I know I’m forgetting things. you are right but with that much current needed not sure what I could use.

Joseph

[runaway_pancake]

Sunday night came early this week.

[josephchrzempiec]

Lol yes for me.

My friend sending only a lipo battery and charger for it.

Joseph