Physical Computing

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Introduction to PN-Junction Semiconductor Diodes and AC to DC Conversion

In this lab activity you will examine the properties of pn-junction diodes and use diodes to convert AC signals to DC signals. Introduction to PN-Junction Diodes A diode is a device that only allows current to flow in one direction. For this reason, an ideal diode has a current voltage plot that looks like this.

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Introduction to 7400 Series Digital Logic Devices

Background The field of electronics is essentially one of applied physics. Modern civilization is possible because scientists and engineers are able to utilize the laws of electromagnetism to build electrical devices capable of doing useful things. Some of the most significant electrical devices of the modern era are digital devices and digital computers. This laboratory

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The Voltage Divider Circuit and LED Current Limiting

Ohm’s Law Ohm’s Law is a mathematical relationship between the current flowing through, voltage supplied to, and the resistance of an electric circuit given by, V=IR where V is voltage in volts (V), I is current in amperes (A), and R is resistance in ohms (Ω). Using the analog/digital trainer, build the following circuit using

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Using the 74HC595 Shift Register for More Digital Inputs/Outputs

The ATmega328 used on the Arduino Uno has 14 digital input/output pins (two are used for serial communication). What if you need more than 14 digital inputs/outputs? One solution is to use an 8-bit shift register like the 74HC595 integrated circuit. This chip has 8 output pins that can be set to high or low

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Introduction to Binary, Hexadecimal, and Data Types

All Your Bases are Belong to Us (Tee Hee :)) Our number system is based on ten digits, 0 through 9, which are used to represent all numbers. This system is referred to as the base-ten or decimal numeral system. Numbers that are larger than 9 are represented with two or more digits, each occupying