Low Battery LED Indicator Board [OSHPark]

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Helder
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Re: Low Battery LED Indicator Board [OSHPark]

Post by Helder » Sun Oct 16, 2016 11:02 am

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.
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Re: Low Battery LED Indicator Board [OSHPark]

Post by lpepe » Sun Oct 16, 2016 11:07 am

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 -.

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Re: Low Battery LED Indicator Board [OSHPark]

Post by Purple_Moogle_00 » Fri Nov 25, 2016 6:35 pm

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
20161125_203428.jpg (4.39 MiB) Viewed 3308 times

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Re: Low Battery LED Indicator Board [OSHPark]

Post by Helder » Sun Nov 27, 2016 2:02 pm

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:

Image
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Re: Low Battery LED Indicator Board [OSHPark]

Post by Marty33 » Mon May 29, 2017 9:17 am

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

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Re: Low Battery LED Indicator Board [OSHPark]

Post by megamax510 » Mon Jun 26, 2017 11:56 am

helder great!

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Re: Low Battery LED Indicator Board [OSHPark]

Post by Merlin » Thu Feb 22, 2018 1:06 pm

Simply awesome!
Can you share the schematic of the "solid values" version?

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Re: Low Battery LED Indicator Board [OSHPark]

Post by djvoodoo » Mon May 14, 2018 12:55 pm

Stupid question. Do I have to put 2 transistors in the parts indicated q1 and q2?

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Re: Low Battery LED Indicator Board [OSHPark]

Post by NasiNoot » Tue Apr 02, 2019 10:44 am

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?

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Re: Low Battery LED Indicator Board [OSHPark]

Post by Helder » Tue Apr 02, 2019 12:14 pm

NasiNoot wrote:
Tue Apr 02, 2019 10:44 am
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?
Necro Bump to post something not even related to this thread :roll:

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.
My Sale Threads:

Retro PSU, 3.5A output!


Chat with me and other members


Don't contact me about obtaining my board files (as you will not get them). Don't contact me about any of my boards if they are sold out, they will be restocked as soon as I can get them.


Don't support thieves like ckliang who copied my AIO to resell and is now cloning the mintyPi, support the original creators and not the thieves!

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