Force discharge circuit output high at low current consumption.

Go To Last Post
9 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Hi all,
I made an ATmega16 based stop watch and I want it to be power by a battery connected on of those charging, protection and boost modules.
The problem is the circuit draws only about 25mA, however the charging module switches the output off automatically if the output current is less than 50mA.
Maybe I can add a resistor in series with the circuit? But I think this would be a terrible solution.
Thanks

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

You would add the resistor in Parallel.  Not series.

 

What voltage are we talking about?

 

JIm

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

"Step N is required before you can do step N+1!" - ka7ehk

 

"If you want a career with a known path - become an undertaker. Dead people don't sue!" - Kartman

"Why is there a "Highway to Hell" and only a "Stairway to Heaven"? A prediction of the expected traffic load?"  - Lee "theusch"

 

Speak sweetly. It makes your words easier to digest when at a later date you have to eat them ;-)  - Source Unknown

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

The output of the charging module is 5V

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Can you provide a link for the module? Adding load current will use up the battery faster.

 

Jim

 

Until Black Lives Matter, we do not have "All Lives Matter"!

 

 

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Seif_1999 wrote:
ATmega16 based stop watch and I want it to be power by a battery connected

Well a M16 would not be an AVR I would choose for a battery powered device, one of the Pico powered AVR's would be better, such as a Atmega168PA (P = pico power)!

Seif_1999 wrote:
on of those charging, protection and boost modules.

Seif_1999 wrote:
The problem is the circuit draws only about 25mA, however the charging module switches the output off automatically if the output current is less than 50mA.

Your not using an LED display are you?

Post a link to the power module you are using, then a freak can recommend a better alternative or how to modify it for your use.

 

Jim

 

 

 

(Possum Lodge oath) Quando omni flunkus, moritati.

"I thought growing old would take longer"

 

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Yup no LED I am using LCD that's why the current consumption is too low.

Maybe use other controller but for now I am settled on the ATmega16

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

You are trying to use the wrong module....put it aside and get one (there are many) that does not have the auto shutoff for light loads.

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I tried but I couldn't find any, and I though that all of these modules have this feature
Any way I will try again,thnak you