how to detect the voltage? - Electronic Circuits Projects Diagrams Free

nabilhattaz · 18th January 2008, 09:34 AM

hi every one.

how can i detect a voltage from lead-acid battery using a micro-controller(i'm using sx28ac/dp)? can anybody show me how to connect the controller to the battery? thx very much.

Tarsil · 19th January 2008, 01:38 PM

U want to monitor the voltage of the bat or just to see if it's below a certain treshhold?
For the second idea u could use the internal comparator. Ul just need a voltage reference and a voltage divider.
About the software...familiar with the PIC's but never used a SX.
FOr the first idea ..use a ADC chip.

nabilhattaz · 19th January 2008, 02:20 PM

the idea is to monitor and to control the battery voltage. say, when the bat reaches max level of charging, it will stop charging and if the volt has drop to minimum it will start charging.

GioppY · 19th January 2008, 03:04 PM

Hi.
Sorry! not with SX but with PIC16F676.
Perhaps this can help.
http://digilander.libero.it/mafragi/battmon.htm

Regards
Gianni

Tarsil · 19th January 2008, 05:08 PM

Hmm ..I like the 16F676 idea...esp since i'l get one of those...

nabilhattaz · 21st January 2008, 02:14 AM

thanks for the infos guys. but anyway i think i am still going to use the sx for this project. anyone in this forum who has knowledge about the sx is welcome to discuss.

Funny NYPD · 22nd January 2008, 10:36 PM

probably you need a A/D chip or circuit.

nabilhattaz · 23rd January 2008, 05:37 AM

Quote:

Originally Posted by Funny NYPD

probably you need a A/D chip or circuit.

is it possible to do something like shown in the diagram i attached?

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18th January 2008, 09:34 AM	(permalink)
nabilhattaz	how to detect the voltage? hi every one. how can i detect a voltage from lead-acid battery using a micro-controller(i'm using sx28ac/dp)? can anybody show me how to connect the controller to the battery? thx very much.

19th January 2008, 01:38 PM	(permalink)
Tarsil	U want to monitor the voltage of the bat or just to see if it's below a certain treshhold? For the second idea u could use the internal comparator. Ul just need a voltage reference and a voltage divider. About the software...familiar with the PIC's but never used a SX. FOr the first idea ..use a ADC chip. __________________ If is too complicated.....most of the times is the wrong way.

19th January 2008, 02:20 PM	(permalink)
nabilhattaz	the idea is to monitor and to control the battery voltage. say, when the bat reaches max level of charging, it will stop charging and if the volt has drop to minimum it will start charging.

19th January 2008, 03:04 PM	(permalink)
GioppY	Hi. Sorry! not with SX but with PIC16F676. Perhaps this can help. http://digilander.libero.it/mafragi/battmon.htm Regards Gianni

19th January 2008, 05:08 PM	(permalink)
Tarsil	Hmm ..I like the 16F676 idea...esp since i'l get one of those... __________________ If is too complicated.....most of the times is the wrong way.

21st January 2008, 02:14 AM	(permalink)
nabilhattaz	thanks for the infos guys. but anyway i think i am still going to use the sx for this project. anyone in this forum who has knowledge about the sx is welcome to discuss.

22nd January 2008, 10:36 PM	(permalink)
Funny NYPD	probably you need a A/D chip or circuit. __________________ F.N.