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Electronics => Electronics => Topic started by: galannthegreat on May 20, 2009, 08:52:53 PM

Title: I also found...
Post by: galannthegreat on May 20, 2009, 08:52:53 PM

I also found some old Nokia 5120's for $0.75 a piece and I found a link that could give some people who may want to know this some help.

http://serdisplib.sourceforge.net/ser/pcd8544.html (http://serdisplib.sourceforge.net/ser/pcd8544.html)

I also got a hold a bunch of Li-ion batteries... but I have a few question on using these batteries. There is 4 connections on the batteries, obviously 2 are labeled "V-" and "V+", but there are 2 others labeled "ID" and "T", and I have no idea what they may mean. Any help here?

Title: Re: I also found...
Post by: SmAsH on May 21, 2009, 12:21:37 AM

this is a guess, but don't most lipo batteries have built in protection circuits?
t may be a temp monitor?

Title: Re: I also found...
Post by: galannthegreat on May 21, 2009, 10:03:39 AM

That would make sense. So then pretty much for charging it's positve to positive on the charger, and same for the negative? And I still have one labeled "ID", could it be a bsttery level detection circuit?

Title: Re: I also found...
Post by: SmAsH on May 21, 2009, 02:42:22 PM

yes, you may be right... but cant a battery level be know via the voltage lines?

Title: Re: I also found...
Post by: galannthegreat on May 21, 2009, 02:49:24 PM

Well I have a booklet from Microchip that gives a simple circuit to connect to an MCU to show battery levels, but it takes up extra space. So I may have to do some investigating now, get some tools, and open one up to get a schematic made up of the circuit. Thanks for the intuitive ideas SmAsH. :)