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component basics for beginner
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Knightrous
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quote:
Originally posted by miles&Jules:
Hi Guys
Ok got some balance leads on one of our 13v a123 packs (im charging it at one amp)..but it times out before getting to full. Do I need higher amps?
Miles


Try charging @ 5Amps
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Post Wed Mar 02, 2011 8:39 pm 
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miles&Jules
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So they are less prone to explosions when balanced?
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Post Wed Mar 02, 2011 8:49 pm 
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Knightrous
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quote:
Originally posted by miles&Jules:
So they are less prone to explosions when balanced?

I've charged my packs numerous times @ 10amps with no balancers, no explosions. Only time I've had them go bang is when I've charged them at the wrong voltages (ie, charged a 4cell pack on 6cell charge rate).

Charging at 1amp just takes forever Razz
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Post Wed Mar 02, 2011 8:52 pm 
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miles&Jules
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Yeah ....but they are less likely to go bang ...right? Alright next time I will try 3amps and see how that goes(thats what the hd power pack maxs out at anyway). 5 amps scares me!
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Post Wed Mar 02, 2011 8:57 pm 
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miles&Jules
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Hey where do you guys buy your bread boards?
We been looking around and they all seem to thin and expensive.
Miles
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Post Sat Mar 05, 2011 10:04 pm 
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marto
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Ahhhh. Are we talking about the electronics kind of bread board or the HDPE kind of cutting board.

If its the cutting board king the only good one I have found are at bigW and are often out of stock. They are like 400mm x 250mm. We have one in our kitchen which I bought for robot use a while ago. So it may dissapear at some point.
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Post Sun Mar 06, 2011 12:40 am 
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miles&Jules
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He he yeah we were at big W the other day...they were all about $20 but looked like they were less then 1cm thick!
Miles
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Post Sun Mar 06, 2011 10:19 pm 
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seanet1310



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i got my plastic cutting boards from various kitchen supply shops mostly industrial kitchen shops. You can get some massive boards some 19~20mm thick or so and weigh as much as a bot
I have yet to see much thicker then that
They look at you a tad funny when you walk out with a couple of massive boards and nothing else kitchen wise.
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Post Mon Mar 07, 2011 2:46 pm 
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miles&Jules
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Hi guys
Is this a goodie for ant drives?
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=662

Miles
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Post Sat Mar 19, 2011 8:31 pm 
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dyrodium
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that's the one! The TG9e is identical, and 60c cheaper. Smile
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Post Sat Mar 19, 2011 9:15 pm 
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Jaemus
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Haha but they specifically say "You will not find the same quality servo for less, anywhere!"

EXCEPT HERE ON HOBBYKING MUAHAHA
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Post Sat Mar 19, 2011 10:37 pm 
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miles&Jules
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Yeah cant complain about the price! Amazing!!
Miles
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Post Sun Mar 20, 2011 2:46 pm 
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miles&Jules
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Here is a cool link for anyone wanting to build there own speed controller!
http://www.rctankcombat.com/articles/speed-control/
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Post Sun Mar 27, 2011 9:29 pm 
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Fish_in_a_Barrel



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...


quote:
Be careful when using H-bridges. Accidentally closing relays A and C at the same time, or closing relays B and D at the same time, causes a dead short across the battery which could ruin the batteries and/or start a fire. Additional logic circuits are often used to prevent these catastrophic conditions.



quote:
SSRs also usually contain internal protection circuits for current limiting and surge suppression.


They are missing some important circuits (or code) here to prevent $$$ worth of magic smoke...

Also read Chuck's Robotics pages linked here: http://www.robowars.org/wikka/EscHomeMade
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Post Sat Apr 16, 2011 10:45 am 
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miles&Jules
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Yeah they are all above and beyond my soldering /electronics skills. s
Hacked hobby king esc's seem to be the most promising cheap alternative to proper dual channel esc's....Looking forward to what Steve comes up with next!!!
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Post Sat Apr 16, 2011 6:37 pm 
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