Hackaday links: December 26, 2010

Obligatory tech tree

It’s hard to let a Christmas go by without looking in on a geeky Christmas tree project. Luckily, [Peter Davenport] decided to share his Arduino and LCD shield tree.

Blinking USB dude

If you’ve got a 555 timer and some commonly¬†salvageable¬†components give this blinking LED man a try. The version above is USB powered but that’s just to take advantage of the 5V regulated power.

Propeller business card

[Jay's] business card is packing quite a punch with this Propeller microcontroller. We love seeing electronics design in cards (however unrealistic the price and portability may be), and this is a big processing upgrade compared to the Tiny85 based offering.

Flying high in NYC


We leave you with a spectacular view of New York City. This breathtaking footage is just as fascinating as the first videos we saw from these folks.

Comments

  1. localroger says:

    Saw that RC vid I think via ./ and while it’s ultra cool possibly not much of a hack, more of a professional production with lots of experience, testing, planning, and involvement by the authorities so the DHS wouldn’t come down on him for it.

    Saw Jay’s business card over at the Prop forums. Thought he was being a bit paranoid over the cell battery, the prop is clearly rated to run down to 2.8V and if you run it on RCSLOW (native slow oscillator, ~20 kHz) it runs at even lower voltages and draws microamps.

  2. Jonam says:

    The 555 LED blinker reminded me of the LM3909 LED flasher chip available up to the 1980s. Almost as versatile as the 555, it would run off 1.5V and flash an LED for ages requiring only a timing capacitor to run. National Semiconductor’s databook had a fascinating set of example circuits for it including an AM radio. Alas, it was consigned to the dustbin of history long ago.

  3. Osgeld says:

    I think we have a new winner, a 8 core 32 bit mcu blinking LED’s hehe

  4. Inventorjack says:

    Gotta agree Osgeld. Pretty crazy to use a powerful $8 chip when one under a dollar would prove more than capable for the job.

    Nonetheless, it does seem he gained some experience and knowledge in creating it, and I suppose that’s a pretty important thing.

  5. BlueLaser says:

    ^^ True, a PIC 10F222 (6 pin 8 bit micro) can blink 8 LEDs when charlieplexed. Hopefully, this leaves room for expansion with an OLED display and touchscreen.

  6. grenadier says:

    That flight video is bad ass. Another thing to add to my project list.

  7. Osgeld says:

    agreed jack

  8. sam says:

    @localroger

    the authoritys where not involved in any planning and were not notified, this was done by a member in a forum that im quite involved in, and the guy who didn’t doesn’t live in the us so nothing will happen to him. lol win!

  9. dude says:

    whats the record for fastest led blink? even if u ran an led on an offset ac wave (like +1.5,-.5) to suck away unused power… how fast could you blink an led and still be able to measure with optical equipment that its still blinking?

    how fast does the 8 core do it?

  10. Jay says:

    I agree, it’s ridiculous to use an $8 chip on my card. This is just my a first attempt. Also, I’ll probably hand out un-populated boards most of the time.

    The next version is going to either have a matrix of LED’s, or video out, so my resume shows on a TV. Also, I’m learning to use MSP430 to make small projects like this cheaper.

    Too bad the Propeller costs so much, it’s such an easy chip to use.

  11. localroger says:

    @sam, OK, I was just going by the fact that the guy credits “the TSA and DHS guys” in the props. Maybe he was being sarcastic.

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