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Using lithium batteries?
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Using lithium batteries?

by jive on Tue Nov 06, 2007 11:38 pm

Hello all!

Was thinking about ordering a tv-b gone kit, but I see they are backordered. In the mean time, I was wondering if you couldn't power it via a lithium button cell? Seems it would make everything a bit more compact.

Jive
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by fdsa on Wed Nov 07, 2007 12:37 am

That ought to work just fine :), the brownout detect is set to:

BODLEVEL[2:0]=110

So min, typ, max = 1.7, 1.8, 2.0V
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by adafruit on Wed Nov 07, 2007 2:12 am

a coin cell probably wont be able to supply the current bursts needed
but you should give it a try!

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by maltman23 on Thu Nov 08, 2007 3:34 am

Coin cells work fine to power the ATtiny. They also work fine in powering the original TV-B-Gone remote control keychains. The tradeoff is that the coin cell is small and light-weight, but they also can't supply the same amount of current that two AA cells can provide. One of the limiting factors of coin cells is their relatively high internal resistance, which limits the current they can supply to the IR emitters. They work, but the range of your TV-B-Gone Kit will be way reduced. Give it a try and see. It may be worth the tradeoff for you to have a more compact and light-weight tool of mass-peace. Or, you may prefer to have a more powerful, yet bigger and heavier axe to get the job done.

Mitch.

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Please be positive and constructive with your questions and comments.