DIY Wallet Indicator Tells You When You're Out of Cash

It's always hard to remember to go to the bank after you've spent your last bit of cash. DIYer macobt put together a tiny indicator for his wallet that lights up when it's empty.

This trick basically uses a small circuit that puts a tiny battery in your wallet. When you take your cash out, it closes a circuit that lights up the indicator on the edge of your wallet. Check out the video above to see in action.

Make empty wallet cash indicator | Macobt Projects via WonderHowTo

Source: http://feeds.gawker.com/~r/lifehacker/full/~3/8z8MWtouqp4/diy-wallet-indicator-tells-you-when-youre-out-of-cash-476517201

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