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Why 555 timer named as 555?
A 555 timer basically consists of: # A voltage divider circuit, # Two comparators, # An SR flip-flop, and # Two (bipolar) transistors: one NPN (discharge) and one PNP (reset), as can be seen in its block diagram. The voltage divider consists of three 5Kohm resistors, so that we get (1/3)Vcc and (2/3)Vcc; we use these voltages as references for the comparators. The three 5K resistors, along with IC's main applications being in timer and multi-vibrator circuits, give it the name 555 timer.
Why IC555 is called universal IC?
A Universal is a choice of words but this chip is widely used as a timer the accuracy for long elapse time is very good so that is widely used
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.
Why using 555 timer in ir transmitter?
The 555 is a timer and oscillator chip capable of sourcing and sinking 200 milliamperes, and is useful for pulsing an infrared LED to power an infrared transmitter. It can be pulse width modulated or otherwise controlled via the various control pins. See: http://talkingelectronics.com/FreeProjects/555/555-P3.html in most cases the IR detector used is TSOP sensors which works only on a specified frequency of 38KHz. So by using 555 timer, we can design the circuit very easly to work @ 38KHz. dats why in 555 is used in many IR txns.
Why use phone number 555 555 5555?
The number 555-555-5555 is not a good number. Some people use it to mask their actual number so the person being called cannot identify them.
How can I customize the brightness of a lamplight using 555 timer?
A: The lm555 is a timer its output is either of or on. to make any kind of brightens out of it requires to make it an astable oscillator and running the frequency and duty cycle low my guess ti will work so would a series resistor.
Why the ship Titanic is called that?
Titanic after "Titan" and "ic" for like. So it was called the R.M.S Titanic for being "like Titan".
What is the code to call a mobile in Australia from Ireland?
Replace the leading 0 with 61, so for example 0401 555 555 becomes 61401 555 555
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.
Can you use one 555 timer to measure capacitor?
Yes. Setup the 555 as an oscillator and plug the capacitor under test into it and measure the frequency of the signal generated. For more precision, measure the charge time only, and use a constant current source, but that is getting more complicated than need be - there are far better ways to test a capacitor than with a 555.
What is non-ic housing with recessed lights?
IC means Insulated Ceiling. A non-IC can needs the insulation pulled back away from it so it won't overheat. An IC can may touch the insulation.
What is non ic housing with recessed lights?
IC means Insulated Ceiling. A non-IC can needs the insulation pulled back away from it so it won't overheat. An IC can may touch the insulation.
