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What are advantage and disadvantage of a fire alarm which are made by using thermistor and ne555 timer?
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What is the difference between NE555 and IC555?
NE555 and IC555 are the same and there is no difference (Jeph)
Full form of ne in ne555?
NE555 is made by SigNetIcs which is Signal Network Electronicshence NE is Network Electronics
What is NE in NE555 IC?
network electronics
How many pins of IC NE555?
The 555 has 8 pins...GroundTriggerOutputResetControlThresholdDischargeVcc
What is the function of IC-NE555?
Originally designed as a timer it has dozens of possible uses:timerflipfloppulse width modulatorpulse position modulatoretc.
What is a NE555 sound chip?
The 555 is not a sound chip, it is a general purpose programmable timer. As such, it is possible to program it to generate sounds or clock digital sound synthesizer chips.
What is an NE555's job in a circuit?
A 555 chip is used as a timer. In a monostable circuit the chip will send one pulse after a period of time. If the chip is in a astable circuit it will send pulses forever.
What is triangular wave generator?
Triangular wave generator is a device (for eg NE555 timer) that generates a triangular wave by integrating a square wave. In applications an ICL8038 IC can be used to generate all types of waves.
What can be done to make the clock of 555 timer IC run faster?
Nanosecond TimerDoubling the timing Rate of NE555 indefinitely(1) The square pulse waveform of NE555 is differentiated to yield double the speed.The differentiator circuit generates two pulses for each square pulse, one on the rise, second of the fall of the pulse.(2) The output of the differentiator is rectified by diodes, amplified, fed to Schmitt Trigger circuit.The Schmitt Trigger circuit, now, has double the rate of NE555 with square pulses.(3) The output of the Schmitt Trigger is differentiated, as in step (1).Theoretically, we could continue the doubling of timing rate indefinitely.Mohamed F. El-Hewiehttp://www.amazon.com/Nuclear-Physics-Personal-Atomic-Molecular/dp/1463795092/ref=sr_1_2?s=books&ie=UTF8&qid=1337709617&sr=1-2
How does led light blink?
Hi there There are LED's available that already have the circuit inside them to blink. These are easily found at car alarm installation shops..they are very common and easy to use. Now if you want to make a circuit and have control over the blink rates etc , then you can either go with a NE555 timer chip ,but you will need about 10 other components to get that to work. OR , you could use a LM3909 Led flasher chip , and that needs only 3 or 4 other parts to get it to run,,,it is very easy. OR , you could , if you wanted to go nuts , program up a microprocessor or an micro-controller to do the job. This last method is the most expensive and the most complicated , but at the same time , its very impressive.
How dummy alarm works?
This Dummy Alarm project makes an LED flash briefly once every 5 seconds to imitate the indicator light of a real alarm. The circuit is designed to use very little current to prolong battery life so that it can be left on permanently. An on/off switch is not included, but could be added if you wish.The 7555 timer IC used is a low power version of the standard 555 timer. A 'superbright' red LED is used because this provides a bright flash with a low current. The LED is off for most of the time so the average total current for the circuit is less than 0.2mA. With this very low current a set of 3 alkaline AA cells should last for several months, maybe as long as a year.The circuit will work with a standard 555 timer IC (such as the popular NE555) but this will increase the average current to about 2mA and the battery life will be much shorter. You can use a greater supply voltage (15V maximum) for this circuit but the 1k resistor for the LED should be increased to keep the LED current low at about 3mA. For example to use a 9V PP3 battery change the 1k resistor to 3k3. Note that AA cells will last longer than a 9V PP3 battery.This project uses a 555 astable circuit.
Why do IC names start with 7?
IC's which starts from 7 are most of them are digital ic's . not all the IC's starts with 7 for example LM380 audio IC CTC810 audio amplifier ic and lm317 voltage regulator ic ,NE555 timer ic, 4017 counter and so other. there are no fact behind them . 7400- nand 7402 -nor 7404-not 7408-and 7432-or 7486-exor 74266-ex-nor 74147 priority encoder.
