Here Comes Santa Claws

Liberty Games in the UK was looking for a fun way to support charity for the holidays, and we think they succeeded. They decided to set up an arcade crane machine to run over the internet, with each type of toy snagged earning  a donation. Snag a bear, and they will donate £5 to St Mungos, a UK charity that works with homeless or at risk people. Snag one of the rarer Santa toys, and they will donate £20. It’s a great cause, and a nice hack. Behind the scenes, the Internet side of things runs on a Raspberry Pi connected to a PiRack and a couple of PiFace digital interface cards that are wired into the electronics of the crane machine so they could control the buttons on the machine from a Web interface. Unfortunately, it didn’t seem to be running when we tried it, but hopefully someone will give the machine a swift kick shortly to get it going until the Hackaday traffic invariably brings it down again.

One of the interesting thing that they discovered while working on these hacks: they have a pay-out ratio that is determined by the strength of the grabbing arm. The owner can tweak this so that the arm does not grab very firmly, which means a dropped bear. Want to torture your friends with hopes of snagging the best stuffed animals?. Follow the example of this claw machine build all from parts on hand.

Full Size Custom Claw Machine Built with Parts on Hand

You know how it goes – sometimes you look at your social calendar and realize that you need to throw together a quick claw machine. Such was the dilemma that [Bob Johnson] found himself in during the run-up to the Nashville Mini Maker Faire, and he came up with a nice design that looks like fun for the faire-goers.

Seeking to both entertain and enlighten the crowd while providing them with sweet, sweet candy, [Bob] was able to quickly knock together a claw machine using mainly parts he had on hand in the shop. The cabinet is nicely designed for game play and to show off the gantry mechanism, which uses aluminum angle profiles and skate bearings as custom linear slides. Plenty of 3D printed parts found their way into the build, from pillow blocks and brackets for the stepper motors to the servo-driven claw mechanism. A nice control panel and some color-coded LED lighting adds some zip to the look, and a Teensy LC runs the whole thing.

Like [Bob]’s game, claw machines that make it to Hackaday seem to be special occasion builds, like this claw machine built for a kid’s birthday party. Occasion or not, though, we think that fun builds like these bring the party with them.

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Happy Birthday, Son. Here’s Your Very Own Claw Machine

mrclawIf [Will Baden] is in the running for Father of the Year, he’s a shoe-in. His son requested a robot-themed birthday party, so [Will] did what any superhero father would do and built him a toy claw machine.

[Will] harvested many of the parts from copy machines: both the 5V and 24V power supplies, the limit switches, 2/3 of the motors, and the 24V solenoid coil in the claw. The carriage is from a commercial printer. He made many of the mounts, including the ones holding the 3 stepper motors from Pololu.

A PIC16F870 is running the show. [Will] programmed it in assembly using Timer2 for stepper pulsing and RB0 interrupt to drop the claw when the button is pushed. He also added a WDT to get out of code trouble if needed. The claw’s solenoid is driven by a ULN2001A Darlington array. [Will] put a kickback diode on the coil so the pulses don’t go farther than they need to. He formed the fingers of the claw by bending pieces of brake line.

Not your kind of claw? Check out these incredible Wolverine claws!

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