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Re: Low Battery LED Indicator Board [OSHPark]
Posted: Sun Oct 16, 2016 11:02 am
by Helder
lpepe wrote:Helder wrote:Looks alright to me, is your battery charged? do you have a multimeter to show how much voltage it has? Also try a pot like in the first schematic I posted and mess with the values to see when it lights up at the battery voltage when it's low and take the measurements with a multimeter of the POT to get the resistor values.
Of course, it's charged. With potmeter didn't tried yet, I didn't ordered one....
I used a 18650 li-ion battery, but I think this isn't the problem? (the battery is brand new Samsung cell...)
You're multimeter shows it's a negative voltage so maybe you have the battery backwards? hence why the light is always on.
Re: Low Battery LED Indicator Board [OSHPark]
Posted: Sun Oct 16, 2016 11:07 am
by lpepe
Helder wrote:lpepe wrote:Helder wrote:Looks alright to me, is your battery charged? do you have a multimeter to show how much voltage it has? Also try a pot like in the first schematic I posted and mess with the values to see when it lights up at the battery voltage when it's low and take the measurements with a multimeter of the POT to get the resistor values.
Of course, it's charged. With potmeter didn't tried yet, I didn't ordered one....
I used a 18650 li-ion battery, but I think this isn't the problem? (the battery is brand new Samsung cell...)
You're multimeter shows it's a negative voltage so maybe you have the battery backwards? hence why the light is always on.
No, just the multimeter plugs were inverted in-plugged.
The red wire from the battery is + and the black is -.
Re: Low Battery LED Indicator Board [OSHPark]
Posted: Fri Nov 25, 2016 6:35 pm
by Purple_Moogle_00
I'm not at all good with all this calculating resistors and such, but if one could clarify that would be great. It's set up like this correct?
- 20161125_203428.jpg (4.39 MiB) Viewed 11602 times
Re: Low Battery LED Indicator Board [OSHPark]
Posted: Sun Nov 27, 2016 2:02 pm
by Helder
Purple_Moogle_00 wrote:I'm not at all good with all this calculating resistors and such, but if one could clarify that would be great. It's set up like this correct?20161125_203428.jpg
I have another board on the first post that shows the resistor values so no idea what you're talking about and it should be wired like this:
Re: Low Battery LED Indicator Board [OSHPark]
Posted: Mon May 29, 2017 9:17 am
by Marty33
Hello @Helder.
After working on my project, i broke the Red led on my Powerboost 1000C.
Your Low Battery LED Indicator is always a solution ?
I can use your solution and place it between the battery and Powerboost ?
Big thanks
Re: Low Battery LED Indicator Board [OSHPark]
Posted: Mon Jun 26, 2017 11:56 am
by megamax510
helder great!
Re: Low Battery LED Indicator Board [OSHPark]
Posted: Thu Feb 22, 2018 1:06 pm
by Merlin
Simply awesome!
Can you share the schematic of the "solid values" version?
Re: Low Battery LED Indicator Board [OSHPark]
Posted: Mon May 14, 2018 12:55 pm
by djvoodoo
Stupid question. Do I have to put 2 transistors in the parts indicated q1 and q2?
Re: Low Battery LED Indicator Board [OSHPark]
Posted: Tue Apr 02, 2019 10:44 am
by NasiNoot
so i have bought this cheap psu for my gbz build:
https://aliexpress.com/item/Top-Deals-3 ... Title=true
i don't know for sure if it has support for leds, does anyone know?
if not, would this board work?
Re: Low Battery LED Indicator Board [OSHPark]
Posted: Tue Apr 02, 2019 12:14 pm
by Helder
Necro Bump to post something not even related to this thread
It's the generic PSU mentioned in the wiki and it also has the LED locations you can solder them on yourself to have charging status and low battery indication.