There's no better Halloween prop than a carved pumpkin. But Mark didn't like the idea of leaving burning candles unattended in his squash, so he built a battery-powered light source instead. For a realistic effect, he used a timer circuit that produces a pseudo-random timer pattern that makes two ultra-bright orange LEDs flicker, simulating a flame. The power source is four batteries at 1.5V or two 9V batteries wired in parallel for more current and longer glowing time.
"Scary Pumpkin" Parts List
Allied Part #
Quad 2 input NAND Schmitt MC 14093BCP
LM7805 voltage regulator +5V dc
Orange ultra bright 5 mm LED
2N2222 transistors NPN
Enclosure plastic 3 × 2.5 × 1.5
Capacitor ceramic 104, 0.1 F
Capacitor electrolytic 100F
Additional parts required: 18-2 stranded power wire (5 ft), 9V battery and straps, plastic drywall anchor screw, assorted resistors
For Mark McCuller's instructions on how to create your own "scary pumpkin," click here.
To view a schematic drawing of McCuller's "scary pumpkin," click here.
Are they robots or androids? We're not exactly sure. Each talking, gesturing Geminoid looks exactly like a real individual, starting with their creator, professor Hiroshi Ishiguro of Osaka University in Japan.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.