robotica
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Logic gate circuits are designed to input and output only two types of signals: "high" (1) and "low" (0), as represented by a variable voltage: full power supply voltage for a "high" state and zero voltage for a "low" state. In a perfect world, all logic circuit signals would exist at these extreme voltage limits, and never deviate from them (i.e., less than full voltage for a "high," or more than zero voltage for a "low"). However, in reality, logic signal voltage levels rarely attain these perfect limits due to stray voltage drops in the transistor circuitry, and so we must understand the signal level limitations of gate circuits as they try to interpret signal voltages lying somewhere between full supply voltage and zero. TTL gates operate on a nominal power supply voltage of 5 volts, +/- 0.25 volts.
Logic signal voltage levels : LOGIC GATES
Package Tracker - SparkFun Electronics
Description: Ever wondered how the shipping companies treat your packages en route to the destination? The Package Tracker is the newest addition to our growing repertoire of data logging and tracking devices. This new device incorporates an LPC2148 with USB and microSD support, an expansion header compatible with the EM408 GPS module, an SHT15 Humidity and Temperature Sensor, an SCP1000 Barometric Pressure Sensor, and an ADXL345 Triple Axis Accelerometer all conveniently designed onto a board that fits into the SparkFun enclosures. There's even a USB charging IC which allows you to charge your LiPo battery over USB. We threw on the Sparkfun LPC2148 USB Bootloader for good measure, which means you can quickly and easily modify the device's firmware! Assembled PCB only - product does not include media, GPS unit, battery, or enclosure.
One year ago, we got super excited when a micromouse managed to negotiate a maze in under five seconds . At the 2011 All Japan Micromouse Robot Competition in Tsukuba, the micromouse pictured above shaved an entire second off of that time, completing the maze in a scant 3.921 seconds. That's fast. This robot, called Min7.1, was designed by Ng Beng Kiat. It has a top speed of just over 12 kph, which is wicked quick for something that's 10 cm long and weighs only 90 grams.
Meet the New World's Fastest Micromouse Robot - IEEE Spectrum