Nintendo DS users are usually limited to using the Nintendo handheld's own built-in alarm clock feature, if they need to wake up at a certain time and there's no other gadget to use as an alarm. But not anymore - check out the OtaClock RC1, an alarm that is guaranteed to wake you up by requiring you to make use of your brains.

The OtaClock RC1 is whipped up by homebrew developer madcat1990, based on the official Konami desktop accessory OtaClock for the PC and Mac. In its homebrewed DS incarnation, the OtaClock requires DS users to solve a Math problem first before the alarm can be shut off.

Unfortunately, unlike the Nintendo DS's built-in alarm clock feature, the OtaClock doesn't go off when the DS is closed when turned on. This will mean that you would have to keep the DS turned on and open for it to work - not really ideal if you want something to wake you up after several hours of sleep.

However, if you just need a timer, the OtaClock is most certainly a cool application to use. Do check this out, especially if you're an Otacon fan. As always, just download the file from the link below and just copy and paste the .nds file in the Games folder (or root folder, depending on how you set up your DS homebrew device) of your favorite homebrew card. Enjoy!