Robolympics Medal

Comments

• FireHopper Posts: 180

  2009-02-02 23:40 edited 2009-02-02 23:40

  123a? thats a common battery for cameras..
  
  its 3 volt isn't it? the 223 is the 6 volt right?
• Ugha Posts: 543

  2009-02-02 23:58 edited 2009-02-02 23:58

  I've tried two shops with no luck on the CR123A yet.
  
  It's 3 volts, yes, according to wikipedia... but there are two of them in the medal.
  
  I can swap it over to AAs but I needed to know if there was any special reason the 123As were used... does the circuit require exactly 6 volts? Or is there
  some feature of a lithium battery that I don't know of that it needs?
  
  In other words, I'm just being cautious.
• Cole Logan Posts: 196

  2009-02-03 00:03 edited 2009-02-03 00:03

  I found them at walmart the last time I got batteries last x-mas for my moms camera.
• FireHopper Posts: 180

  2009-02-03 00:05 edited 2009-02-03 00:05

  Ugha said...
  I've tried two shops with no luck on the CR123A yet.
  
  It's 3 volts, yes, according to wikipedia... but there are two of them in the medal.
  
  I can swap it over to AAs but I needed to know if there was any special reason the 123As were used... does the circuit require exactly 6 volts? Or is there
  some feature of a lithium battery that I don't know of that it needs?
  
  In other words, I'm just being cautious.

  
  if you swap to AA's you will need 4 aa's instead of the 2 123's
  and yes. radio shack and walmart and CVS and target and such should carry them
• Ugha Posts: 543

  2009-02-03 00:11 edited 2009-02-03 00:11

  I figured I'd need the four AAs... thanks for the feedback... I'll start hacking right away!
• RDL2004 Posts: 2,554

  2009-02-03 05:48 edited 2009-02-03 05:48

  You won't easily find CR123 batteries if you live far from civilization, but they are fairly common. Walmart stocks them (look in the photo dept.), and any other large chain including drugstores such as Walgreen's, Radio Shack, etc. should have them (they do tend to be very over-priced in some stores though).
  
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  - Rick
• Ugha Posts: 543

  2009-02-03 12:59 edited 2009-02-03 12:59

  I went ahead and disconnected the battery holders on the back of the medal and soldered on some wires.
  
  I have a 6volt wall wart I can use for programming (Once I find something I can scrap for a female barrel-jack) and if I ever need to, I can use 5 AA rechargables
  to reach the 5.5v or so the thing seems to require.
  
  On a side note... Rechargables, when freshly charged, read at higher than 1.25v. Its actually enough to run a BOE or SX tech board on 4 for about 5-10 minutes!
  Ya learn something new every day [noparse]:)[/noparse]
• wmroe Posts: 3

  2009-02-04 22:19 edited 2009-02-04 22:19

  I just bought a kit that has a Medal included. I looked at it for a long time, trying to figure out the battery.
  I checked the Parallax website, only to find that discontinued items are not supported... [noparse][[/noparse]Bummer]
  
  I had read in "Nuts and Volts" that the forums are a great place to get info, so... Here I Am... [noparse]:)[/noparse]
  
  Thanks, Ugha, for the battery number and specs.
  I'll get some at Wal-Mart tomorrow, then... IT'S PLAY TIME... [noparse]:)[/noparse]
  
  W. Mark Roe
• Ugha Posts: 543

  2009-02-05 22:03 edited 2009-02-05 22:03

  What I ended up doing was desoldering the battery holders and run the thing off the +5volts on a BOE. It can also safely run on a regulated 6volt supply.
  
  At least those are my experiences.
• Gadgetman Posts: 2,436

  2009-02-05 22:09 edited 2009-02-05 22:09

  Would a 5pack of batteries for $4.30 do?
  
  http://www.dealextreme.com/details.dx/sku.5639
  
  And yes, that includes shipping...
  (They have rechargeables in the same size, too)
  
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