Search found 22 matches

by danmachen
Mon Jul 30, 2012 7:33 am
Forum: BMS thread
Topic: LTC6802 based 12 cell slave.
Replies: 75
Views: 59000

Re: LTC6802 based 12 cell slave.

Thanks alot Greg,

Do you know what sort of accuracy iteadstudio can make the boards to? Have you ever had any trouble with the tracks being too close?

Dan
by danmachen
Tue Jul 24, 2012 1:41 pm
Forum: BMS thread
Topic: LTC6802 based 12 cell slave.
Replies: 75
Views: 59000

Re: LTC6802 based 12 cell slave.

Gregg, good luck with the LTC6802s, its certainly something I looked at at the very beginning and they are definitely a good IC. I'll be interested to know what final accuracy you can achieve with them. What company or contact do you have for making the PCBs? I'm wanting to send away a few PCBs for ...
by danmachen
Tue Apr 24, 2012 7:23 pm
Forum: BMS thread
Topic: Old BMS Software Thread
Replies: 600
Views: 205376

Re: Old BMS Software Thread

Ah right ok, so the opto inverts the signal and so you invert it again in the master code.
by danmachen
Mon Apr 23, 2012 9:06 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 342234

Re: Old BMS General Thread

Isaac, how are the Xbees coming along? Have you tried using these yet. You'll probably need a MAX232 as well if you want to connect it to the PC for data logging.
by danmachen
Mon Apr 23, 2012 9:05 pm
Forum: BMS thread
Topic: Old BMS Software Thread
Replies: 600
Views: 205376

Re: Old BMS Software Thread

Here comes probably an overasked question
.. so please forgive me....Just wanted to ask the logic of why all the serial signals are inverted from the PIC? e.g. N9600..

Why would the signal need to be inverted, instead of say making it true the entire time?
by danmachen
Sun Apr 15, 2012 8:34 pm
Forum: BMS thread
Topic: Old BMS Hardware Thread
Replies: 613
Views: 218860

Re: Old BMS Hardware Thread

What is the pitch between the contacts for the jumpers on the master board? I'm assuming 2.54mm. I'm trying to upgrade the jumpers to Molex Microfit connectors when everything is tested and wanted to check the pitch with you.
by danmachen
Fri Apr 13, 2012 8:45 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 342234

Re: Old BMS General Thread

Also, does anyone know of decent software (hopefully free) :wink: for drawing schematics? Trying to keep on top of any changes we make and it would also be useful for other circuits our team is using for our electric car. Thanks
by danmachen
Fri Apr 13, 2012 8:44 pm
Forum: BMS thread
Topic: Old BMS General Thread
Replies: 658
Views: 342234

Re: Old BMS General Thread

Got this PM from Issac. hey, i'm ordering up a bunch of components to build up a couple of master boards. the EEprom that's listed in the parts list i have is now obsolete, and i'm not positive what i should replace it with. the part number listed is AT24C512B-PU25. what constraints do i have to ke...
by danmachen
Tue Apr 10, 2012 9:38 pm
Forum: BMS thread
Topic: Old BMS Software Thread
Replies: 600
Views: 205376

Re: Old BMS Software Thread

yeah thought so! Thats a pretty big balancing current... nearly 500mA. Does it work well? We've gone for around 350mA, but don't really want to push it much further.
by danmachen
Mon Apr 09, 2012 9:35 pm
Forum: BMS thread
Topic: Old BMS Software Thread
Replies: 600
Views: 205376

Re: Old BMS Software Thread

heres the link for the xbee... http://www.digi.com/products/wireless-wired-embedded-solutions/zigbee-rf-modules/point-multipoint-rfmodules/xbee-pro-xsc#overview.." onclick="window.open(this.href);return false;. you'll need to pro with the 1mile range! you'll also need an antenna that works on 2.4GHz...

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