[Antoine] wrote in to let us know that he soldiers on with his flashlight project. He’s doubled up on the supercaps and tripled the LEDs (translated). The core concept has stayed the same since the original version. He wanted a flashlight that was small and used no batteries. This iteration came about as he looked at [...]
This USB slingshot controller really brought a smile to our faces. Part of it is the delightfully silly promo video you’ll find after the break. [Simon Ford] combined nature and technology to bring this USB-enabled slingshot into existence. The frame itself is from a branch he found in the Epping Forrest of London. He whittled [...]
Frenchman Ambroise Paré was originally trained as a barber-surgeon. Posthumous (fantasy) portrait by William Holl (1807-1871) 1561: French surgeon Ambroise Paré publishes La méthode curative des playes et fractures de la teste humaine, or “Treatment method for wounds and fractures of the human head.” Surgery, in Paré’s time, was considered a low profession and very [...]
Yes, it’s time already for another competition! The theme we are takingfor this one is the BeagleBoard system. So, taking the cue, let’s have aBeagleBoard related prize! The ARM Cortex-A8-based BeagleBoard XM , to be precise, which promises “laptop-like performance and expandability, while keeping at hand-held power levels”. Sounds like a useful piece of kit [...]
So, using my newly scavenged motor, I set to work doing some firmware coding this weekend.Previously, my code simply took speed setting commands over serial and implemented them on the motor driver.Now, it’s a little more intelligent. Purpose Feedback is important when your environment is uncontrolled (or uncontrollable).The most familiar example of a feedback system [...]
[Ray's] breadboard power supply lets you drain the last traces of power from ‘dead’ AA batteries. Electronics that are powered off of disposable alkaline batteries have a cutoff voltage that usually leaves a fair amount of potential within. Since many municipal recycling programs don’t take the disposables (you’re just supposed to throw them in the [...]
This image contains a hidden audio track which you’re very familiar with. Well, it used to. We’d bet we messed up the careful encoding that [Chris McKenzie] used to hide data within an image when we resized the original. He’s using a method called Steganography to hide a message in plain sight. Since digital images [...]
If you ever wanted your name out on the Internet, now is your time to shine. [Chris] hooked up an Arduino to the Internet and is streaming the results of combing through Twitter live to the entire world. The SocialBot9000, as [Chris] calls his build, is an Arduino Uno connected to an Ethernet shield and an LCD [...]
I would have to say that this is an announcement other than the Selling date and time etc. The Date and time for the first batch sales has already been stated that this will be done to the mailing list. ie the reason why everyone (should have) subscribed. Bah Humbug I hear you say. The [...]
While function generators or analog signal generators are ubiquitous in their utility, we haven’t seen much of logic function generators on Hack a Day. Luckily, [Dilshan] sent in a really neat 8-channel signal injector that is amazingly simple to build and comes with a great front end for editing patterns from your computer. The hardware portion of [...]
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