the flow. Transistor Q2 may be any number SM3180. The schematic shown here can be used as a circuit for Car brake light or headlight flasher for flashing two 10 watt 12 volt lamps in car or any vehicle. The heart of the circuit is a 555 timer IC‚ wired as an astable multivibrator in the circuit. A 2N3773 high current transistor is also used in the circuit and working as a switch and it is derived from the output pin 3 of the IC through a 1K resistor. The IC generates continuous pulses
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ELECTRONICS LOCK A Report of the project for the fulfillment of the requirement of NIRMAAN (Electronic Hardware Model Exhibition) Sankalp-2009 Submitted By PRAGNYASINI PANIGRAHI (EIE) 200860192 SIBANI SAIDARSANI (ECE) 200860316 ANKITA PANIGRAHI (EIE) 200810202 Organized By Electronics Hobby Club‚ NIST |[pic] |[pic]
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circuit. The project also required code to be written to the 8051 microcontroller to combine all the smaller circuits into an operational system. The 38 kHz generator‚ Fig. 1-1‚ was major factor in getting the infrared receiver to operate correctly. A 555 timing chip was used to output a squarewave at 38 kHz for an infrared LED. The generator needed to be completely isolated from the rest of the circuit because it was found that the infrared receiver’s output was similar to Fig. 1-2 at a frequency
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AC 555 Assignment Week- 7 Problem 18-18 a. (2) b. (2) c. (2) Problem 18-21 a. 1. Both (test of authorization is a test of control) 2. Test of control 3. Substantive test of control 4. Test of control 5. Substantive test of transactions 6. Both (accounting for sequence is a test of control) 7. Substantive test of transactions b. 1. a) To determine that the amount recorded in the acquisitions journal is correct (accuracy)
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In a school‚ as is the case in any organization‚ the efforts of individuals and groups must be coordinated‚ and communication is a powerful tool in that process (Green‚ 2009). Standard one requires school leaders to be able to develop‚ articulate‚ implement‚ and provide stewardship of a vision of learning that is shared and supported by the school community (Standard 1). It is very important that educational leaders develop a vision that is shared with all the stakeholders. According to Green
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across the meter and activates the beeper when the fuel tank is almost empty. Its point A is connected to the input terminal of the fuel meter and point B is connected to the body of the vehicle. The circuit consists of an op-amp IC CA3140 (IC1)‚ two 555 timer ICs (IC2 and IC3) and decade counter CD4017 (IC4). Op-amp IC CA3140 is wired as a voltage comparator. Its inverting input (pin 2) receives a reference voltage controlled through VR1. The noninverting input (pin 3) receives a variable voltage tapped
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step of LED’s is directly proportional to input voltage. when we increase the input voltage then speed of glowing LED’s will increased and when we decreased input voltage then speed of glowing LED’s will decreased. Keywords— Knight Rider light‚ 555 IC Knight rider I - Introduction Everyone knows about Michele Knight and his Black Super Car KITT. Do you remember the running red lights that are mounted in-front of car? Yes. Today we try to make
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Alcohol breathalyzer circuit using 8051 microcontroller. Three digit display 1 of 9 http://www.circuitstoday.com/breathalyzer-circuit-using-8051 Home Forums Datasheets Lab Manual Testing Components Buy Project Kits Custom Search admin June - 5 - 2013 0 Comments Alcohol Breathalyzer circuit using 8051 microcontroller (AT89S51). This article is about a breathalyzer circuit using 8051 microcontroller which outputs the blood alcohol content (BAC) from the breath. The BAC is displayed in percentage
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Chapter 1 INTRODUCTION 1.1 Background of the Study Mankind has always tried to use technologies in order to improve his life. The wheel‚ for instance‚ was invented in order to transport goods saving forces and to move more quickly. The discovery of fire helped to heat him and to defend himself from wild animals. From the very beginning man has always looked for a better way of life. Time after time‚ he has continued to improve his environment‚ both at work and at home. The first automations
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Visitor counting is simply a measurement of the visitor traffic entering and exiting offices‚ malls‚ sports venues‚ etc. Counting the visitors helps to maximize the efficiency and effectiveness of employees‚ floor area and sales potential of an organization .Visitor counting is not limited to the entry/exit point of a company but has a wide range of applications that provide information to management on the volume and flow of people throughout a location. A primary method for counting the visitors
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