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how to use backup battery for atmega128 MCU?

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segmex

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atmega128

how to use backup battery for atmega128 MCU?

ineed a schematic !
plz help

thx
 

wp100

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backup battery avr

Hi,

It depends on what circuity you have already or are proposing to have - can you post a diagram.
 

srinivasandelta

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srinivasandelta

Hey,

From your question we assume that you are trying to develop an efficient battery
operated application using the AVR Device for which you need the Source code and tools.

Unfortunately I do not have the ready-made application note for the AVR device
mentioned in the request. However, it can be implemented using any AVR microcontroller with A/D converter, PWM output and enough program memory to store the desired charging algorithm.

You can refer the following documents to have a general idea for implementing battery operated applications along with source code and schematics:

www.atmel.com/avr/ -->Application Notes-->

-->1) AVR450: Battery Charger for SLA, NiCd, NiMH and Li-ion Batteries

-->2) AVR453: Smart Battery Reference Design

-->3) AVR454: Users Guide - ATAVRSB100 - Smart Battery Development kit

Refer the link below for more information on AVR® 8-Bit RISC devices used in Battery Management Applications:
http://www.atmel.com/products/avr/bm/default.asp?family_id=607

1)AVR352: Using the Coulomb Counting ADC
2)AVR353: Voltage Reference Calibration and Voltage ADC Usage
3)AVR120: characterisation and Calibration of the ADC on an AVR

http://www.atmel.com/dyn/resources/prod_documents/doc7927.pdf

Hope this serves your need and good luck with all your future AVR works :D

with regards,
AVR-MAN
 

    segmex

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Kurenai_ryu

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atmega128 li- ion battery backup

dude It's very helpful! thanks a lot!
 

segmex

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li-ion atmega

thks srinivasandelta
but i mean when the uC power downed the back up starts to work !

i need schematic
tx
 

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