Device enables commuters to donate to charity with their spare subway credit

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Topping up credit — whether it's for a mobile phone, travel pass or pre-paid credit card — inevitably leads to small amounts of change left at the end, which often simply goes to waste (or in the company's pocket). However, we have previously seen Singapore mobile carrier StarHub launch its #4Good scheme, which lets customers donate their excess data to good causes that can use it. Now a UK designer has created Common Pence, a system that can take leftover change off London's Oyster travel pass and give it to charity. Developed by Zander Whitehurst, the project has created a…

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