improvements could be achieved. This is the circuit diagram of my first experiment It was soon clear that the variable resistor didn’t have the necessary resistance to induce the current necessary for the experiment. I replaced the original variable resistor with a rheostat as the resistance could be changed in a more linear way rather than with the exponential increases of the variable resistor. There are few safety hazards in my experiment but to be sure I made sure
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The Software is the Instrument NATIONAL INSTRUMENTS Application Note 065 ® ® Measuring Temperature withThermistors – a Tutorial David Potter Introduction Thermistors are thermally sensitive resistors used in a variety of applications‚ including temperature measurement. This application note discusses this application of thermistors‚ including basic theory and how to interface thermistors to modern data acquisition systems. Thermistor Overview A thermistor is a piece of semiconductor
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Post: Automatic Plant Watering System The whole circuit is based on IC CA3140 which is basically an operational amplifier which can unite the voltage PMOS transistors to the high voltage bipolar transistor on particular chip. LDR (Light depending resistor ) whose resistance is based upon the quantity of the light declining on it along with a few more components. Circuit Diagram of Automatic Street Light Controller Switch Circuit using Relays and LDR is given below. Automatic Street Light Controller
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Alba-Flores Team Members: J. White‚ L. Wall Conducted on: September 17‚ 2009 Submitted on : September 24‚ 2009 Abstract: In this lab students experimented with light emitting diodes. The student built a basic circuit with two LED’s and resistors in parallel. The results showed that the voltage is the same in parallel. The items that were in series had the same current. The results also showed that the current from each branch could be summed up to equal the total current from the source
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& 3600 sec in 1 Hour; 450 kWh x 3600 x 1000 = 1620000000 = 1.62 x 10^9 Joules. 4) If electricity bill is 20p/kWh then 450 x 20p = £90.00 for the quarter. Experiment Experimental Equipment * Ohmmeter * 50 Identical 220 kΩ Resistors in theory
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between 3 and 40 volts. It can be used to regulate either current or voltage in situations where a fixed current or fixed voltage is required. The level of current or voltage required can be adjusted by connecting the chip in series with a fixed resistor and a potentiometer. The LM317 is also a popular variable voltage regulator. It was invented by Robert C. Dobkin and Robert J. Widlar in 1970 while they worked at National Semiconductor. Furthermore‚ both line and load regulation is better than
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Nebulizer A nebulizer is a device that is used for breathing treatments such as asthma‚ cystic fibrosis‚ and other respiratory illnesses. It changes liquid medicine into an aerosol. Aerosol is a "mixture of gas and liquid particles‚" and the best example of a naturally occurring aerosol is mist‚ formed when small vaporized water particles mixed with hot ambient air are cooled down and condense into a fine cloud of visible airborne water droplets. Introduction As
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nonlinear elements are connected. The characteristics of a device are described as voltage vs. current. The devise must be experimentally determined by either the manufacturer or determined experimentally by a user. The characteristic of a resistor is a straight line‚ because voltage and current are proportional‚ through Ohms Law (V=IR or R=V/I). This equation shows that the slope is the value of the resistance which intercept at zero (line that passes through the origin). This information
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Report 10/09/2013 Abstract: The purpose of this experiment was to look at electric power dissipated in a load resistor in a circuit with a real power source‚ which has a finite internal resistance. We discover a surprising result about how to deliver the most power to a device from a source. Consider a simple circuit in which a battery of voltage drives a current through a resistor of resistance. As we have seen‚ the battery is continuously doing work by raising the potentials of charges‚ which
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where the wiring divides into multiple circuits. Each circuit leads to a group of loads‚ which are also wired in parallel within the circuit. Our project shows how chemical energy turns out to electrical energy. A parallel circuit has more than one resistor (anything that uses electricity to do work) and gets its name from having multiple (parallel) paths move along. Charges can move through any of several paths. If one of the items in the circuit is broken then no charge will move through the path
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