Month: January 2010

Update: More Pink Wireless-terminal Hacking

January 6, 2010 by 13 Comments

[Dave] poked around inside of an IM-ME wireless toy and compiled his findings. He read about the device when we covered it in November and picked up a couple to see what he could do. He patched into the debug port in the CC1110 processor and enabled it by performing a chip erase. He then began mapping out how the processor connects and communicates with the qwerty keyboard, the wireless radio, and the LCD screen. The board is full of test points which make the hardware easy to access. [Dave’s] experiments show that this hackable device is full of potential so let’s see what you can do!

Arduino I/O Speed Breakdown

January 6, 2010 by 45 Comments

[Jee Labs] has worked out how long it takes for an Arduino to perform various I/O operations. Predictably, analogRead() takes the longest, followed by analogWrite(). Arduino really falls behind when it comes to digital pin I/O: digitalWrite() takes a whopping fifty times longer than a direct bit write to a port register!  This is something to take into consideration when you are looking to do some beefy I/O with an Arduino. Perhaps this I/O performance will be addressed in the future with Arduino 1.0.

CES Update: January 5, 2010

January 5, 2010 by 29 Comments

As you already know, we’ll be attending CES this year. We’re still looking for ideas on what you, our loyal readers, want to see. We’ve gotten some good feedback, and came up with some ideas of our own. Keep sending in your ideas. Remember, it doesn’t even have to do with CES. Are there any hacker groups in Vegas that we could meet with? Any locations of interest? Let us know.

So far, we have the following requests:

  • Google Nexus
  • Notion Ink tablet w/Pixel-Qi display
  • Instinct Engineering – Suitcase XBOX 360, Fold out gaming couch
  • Car that can drive itself (most likely Toyota or Honda)
  • PSP 4000
  • Transparent OLED display from Samsung
  • Neuro/EEG Devices; Neurosky Booth

RepRap Acrylic Extrusion Using Hotbed

January 5, 2010 by 16 Comments

[Nophead] started the year off by successfully extruding acrylic using a RepRap machine. The problem when working with this material is that when the hot ooze hits the cold air the printed material tends to warp, badly. [Nophead] raised the ambient air temperature around the part being extruded by replacing the bed of the RepRap machine with a heated aluminum plate.

We took at look at his build details for the hotbed. The plate itself is aluminum that he had milled by a machinist friend of his. It looks like the heat is produced by a network of power resistors bolted and soldered to the bottom of the plate. The original idea was to produce a controllable SMT soldering platform. Unfortunately this heating method doesn’t have the power needed to raise the temp quickly but that failure turned out to be a RepRap success.

Generate Electricity With A Candle

January 5, 2010 by 67 Comments

What you see above is a generator that converts heat to electricity. [Reukpower’s] thermoelectric lamp is one of those hacks that makes you scratch your head even though you understand why it should work. The heart of the system uses a Peltier cool, just like the thermoelectric solar generator. When there is a temperature differential from one side of the Peltier to the other a small current is generated.

In this case a candle heats one side and a heat sink cools the other. The tiny voltage picked up from the Peltier’s contacts is then boosted using a joule thief. We’ve seen LEDs powered with a joule thief before, benefiting from their own low power consumption. In this case, the boost circuit is scavenged from an emergency phone charger and probably achieves higher efficiency than if he had built it himself.

Record Player Display Sans POV

January 5, 2010 by 32 Comments

At first glance we thought this record player had been modified to serve as a persistence of vision device. The device looks very much like an unmodified turntable but it has four tracks worth of display space in it. The messages are actually glowing and don’t depend on a POV effect. Instead, the table has been coated with phosphorescent paint that will glow after being exposed to bright light. The needle has been replaced by a small PCB with downward facing LEDs on it. A microcontroller pulses the lights to expose the paint in patterns that make up the messages. This is the same concept we saw with the Ghost Matrix but this iteration is silent, and the control circuitry is less apparent.

The video after the break is a must-watch. The 60 character long messages are beautiful to watch rotate into the display. Unlike a POV display, ambient light will greatly interfere with the effectiveness of this method. That being said, what a wonderful party decoration this would be if mounted on a wall in a rather dark room.

Continue reading “Record Player Display Sans POV” →

Missile Hack Taunts Your Cat

January 5, 2010 by 8 Comments

[youtube=http://www.youtube.com/watch?v=3K7rTWnuQ6Y]

[Atlantageek] sent in a missile launcher project that he threw together. For Christmas he received a Chumby One and a ThinkGeek USB Rocket Launcher as gifts (lucky dog). Neither of these toys are “played with” in the traditional sense as much as they become centerpieces of your next hack. In that spirit, [Atlantageek] immediately wrote a widget to control the launcher via the Chumby. The side effect of driving his cat bonkers was an unexpected bonus.