Banker bot does this

Kathleen Elkins talks about the virtues of a cash only diet:

Yahoo: The cash-only diet is as simple as it sounds: You ditch the plastic, determine how much money to withdraw for a certain amount of time, and buy things only with the cash you allocated for yourself.

The theory behind using only cash is that you're less likely to make impulse purchases — you'll buy more of what you need and less of what you want — as you have a limited amount of cash set aside in your wallet. In addition to becoming a more conscious spender, you have to cross the barrier of physically handing over your money and watching it disappear.

"Rather than blindly using your credit card and deferring whether it's worth it or not until your bill comes — by that time, it's too late — using cash forces you to make that decision when you pay," Sethi writes. "You withdraw a limited amount and watch it dwindle. It's very primal: Since we're more motivated by loss than by gain, each dollar you physically spend will cause you pain: the good kind of pain."

Sethi is not the only one to advocate the cash-only diet. Research shows that people spend significantly more when using credit cards instead of cash, and some people use this strategy to get out of deep debt.

I gave it a whirl for two weeks, heading to the ATM at the start of each week for $125, as I keep my monthly costs under $500 (this excludes rent and utilities). Here's why I'm never going back to my debit- and credit-card days:

 Remember, Smart Card and the bot are cash, cash in its purest form.  Smart card comes with the multi-colored warning light for purchases. So, don't worry, run our bot in safe mode, keep the LED yellow or green.