Short instructions on how to build the regulator:
AMS1117 3.3v voltage regulator
22uF and 0.1uF capacitors
3x4 proto board
I find it easy to cut from larger piece with regular scissors going through the adjacent hole line, then trim
Put 3 blobs of solder in the third line
Align the reg and solder the legs. This should be easy due to the prepared blobs
Insert the 22uF cap through the holes. Note the ground leg. Then solder the positive leg to the middle hole.
Insert the smaller cap through holes (you should have two legs in the leftmost hole - ground)
Solder the legs to the board
Snip the legs short and solder to the regulator
Add wires: two (black) to the ground leg and one red to each of the remaining legs
Black+center red go to the mini board. Black + right go to the output from charger board
Hope it helps,
So, I have good news for those who don’t want to make their own regulator.
There are ready made units with convenient legs to solder on:
The only thing I did was desolder the tiny LED that we don’t want working all the time
Everything is looking good so far. Any tips for soldering to the pre existing legs on the pre built regulator? I’ve never soldered to something like that before.it appeared you used shrink wrap.
Just tin the legs before and go ahead, nothing special.
Shrink is an option
Cool.after assembling I realized the battery leads that came on my battery were far too short. Going to extend them a bit and give it a another try.
Also, desoldering the constant led on the pre built regulator, what is the best way to do that? Being so small… I kind of just burnt it haha.
I did the same thing:grinning:
We don’t need it so it kinda fell off after applying heat
Cool just wanted to make sure there wasn’t a more technical way to do it. I wouldn’t mind it being on all the time but you can see it glowing thru the case so gotta get rid of it.
Yes, and because it drains the battery.
So that’s why it only last 24hrs? Please oh great one tell me how to fix this lol
I want to revise the design in the near future to include bigger battery…
I was planning on replacing with another lipo but this thing with the led might fix what issue I have with it.
Did you leave the LED on your regulator?
My reg is the early version (from components) so no le in the first place
This is something new to me.
My guess is that the reg is draining the battery because it’s always connected.
Is there a more efficient way to get 3v from lipo? Without draining?
The lipo I have is already labeled as 3v - what’s the point of the regulator? Is it necessary?
The mini board is designed to work with 3v (1.5vx2 dry cells)
Max voltage of lipo cell is 4.2v, the regulator protects the mini electronics.
I’m not familiar with your cell, could you check the voltage range: full/empty?
I will check it out when I am home yes