PORTLAND, Ore. — An effort to build a sleek aluminum charging dock for the iPhone generated fervor online when it was announced last December. The project’s creators raised close to $1.5 million through Kickstarter, a crowdfunding Web site, and promised to start shipping their Elevation Dock in April to those who had backed the project.

But last week Apple announced a redesigned iPhone that is not compatible with the dock — and because of manufacturing delays, some of the project’s original backers were still waiting to receive theirs. The designers are now scrambling to make an adapter and update the product.

“I’m just hoping to get mine before the iPhone 6 ships at this point,” one backer wrote on Kickstarter.

Crowdfunding sites like Kickstarter and Indiegogo are letting designers and other creative people connect with audiences who want to finance their dreams, and they are becoming increasingly popular. Nearly three million people have helped a total of 30,000 projects meet their fund-raising goals on Kickstarter, the largest such site, to the tune of $300 million in pledges.

But for the creators of these projects, getting the money is sometimes the easy part. They then have to turn their dreams into reality, with a crowd keeping an eye on their progress.

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