The secret hideout - a thing of the past, a childhood luxury, an adult-less adventure. Those were the days. And remember the secret knock? The only way in. You either knew it or you didn't. The only way to keep the kids in and the grown-ups out.
Well, Steve Hoefer has come up with a way for adults to be kids again - The Secret Knock Detecting Lock.
The secret knock lock is made from a piezo speaker, LEDs, Arduino microcontroller, gear motor, along with a few odds and ends. Perfect for an afternoon DIY project, which you can accomplish yourself with Steve's detailed instructions.
Great way to keep the wives out that late night poker game. See it in action below.
Keep Your Connection Secure Without a Monthly Bill. Get a lifetime subscription to VPN Unlimited for all your devices with a one-time purchase from the new Gadget Hacks Shop, and watch Hulu or Netflix without regional restrictions, increase security when browsing on public networks, and more.
Other worthwhile deals to check out: