100 views
Why is it called a 555 timer?

1 Answer

Answer :

Because it have three 5k Ohm resistances.

Like 0 like

Please log in or register to answer this question.

Related questions

97 views

Description : What is the use of 555 timer?

Last Answer : 555 IC timer is use in timers and oscillators.

1 answer
359 views

Description : What is the difference between a counter and a timer?

Last Answer : Counter counts only when the trigger is applied and timer counts continuously with some equal delay.

1 answer
99 views

Description : What is IC 555?

Last Answer : Ic 555 is timer used for indicating time intervals which is settled in ic 

1 answer
10 views

Description : How to Install a Timer Switch

Last Answer : How to Install a Timer Switch A timer switch is a handy device that automatically turns off a switch after a fixed period of time. This is particularly useful when you have kids at home ... safety precautions when installing switches or anything that might put you in the direct path of electricity.

1 answer
104 views

Description : Blackt Electrotech 230V 24x7 Energy Saving Socket Type Digital Programmable Plastic Electronic Timer (White)

Last Answer : Buy from amazon: https://amzn.to/2SUTSdv Buy: http://bit.ly/2ZqlAkS

1 answer
3.4k views

Description : What is watchdog timer ? Explain the implementation of time out for ATM with block diagram and program.

Last Answer : A special type of timer is a watchdog timer, which will reset the system after a predefined timeout. Watchdog timer reset timer every X time unit, else timer generates a signal ... be loaded into timereg. This is to prevent erroneous software from unintentionally resetting the watchdog timer.

1 answer
0 views

Description : I need a schematic...

Last Answer : Look here—a variety of schematics on this page. http://en.wikipedia.org/wiki/555_timer_IC

1 answer
6 views

Description : List the applications of 555 timer in Astable mode of operation

Last Answer : *FSK generator  *Pulse-position modulator

1 answer
10 views

Description : List the applications of 555 timer in monostable mode of operation

Last Answer : *missing pulse detector *Linear ramp generator *Frequency divider *Pulse width modulation.

1 answer
6 views

Description : Mention some applications of 555 timer

Last Answer : *Oscillator *pulse generator *ramp and square wave generator *mono-shot multivibrator *burglar alarm *traffic light control.

1 answer
191 views

Description : Which of the following are the basic elements in a 555 timer IC? (a) Two comparators (b) A flip-flop (c) A discharge transistor (d) A resistive voltage divider  A) (a), (b) and (d) B) only (a), (b) and (c) C) only (b), (c) and (d) D) only (a), (b), (c) and (d)

Last Answer : Which of the following are the basic elements in a 555 timer IC? (a) Two comparators (b) A flip-flop (c) A discharge transistor (d) A resistive voltage divider  A) (a), (b) and (d) B) only (a), (b) and (c) C) only (b), (c) and (d) D) only (a), (b), (c) and (d)

1 answer
137 views

Description : The output waveform of a 555 Timer is: (1) Sinusoidal (2) Triangular (3) Rectangular (4) Elliptical 

Last Answer : The output waveform of a 555 Timer is: Rectangular

1 answer
347 views

Description : The 555 timer can be used in which of the following configurations ?  a) astable, monostable b) monostable, bistable c) astable, toggled d) bistable, tristable

Last Answer : The 555 timer can be used in astable, monostable configurations.

1 answer
63 views

Description : Timer IC 555 has no pin for  A) Threshold B) Set C) Trigger D) Control

0 answers
134 views

Description : What does the discharge transistor do in the 555 timer circuit?  (A) Discharge the external capacitor to stop the timing (B) Charge the external capacitor to stop the timing (C) ... capacitor to start the timing over again (D) Charge the external capacitor to start the timing over again

0 answers
272 views

Description : Explain the function of sample and hold circuit by using op-amp.

Last Answer : sample and hold circuit by using op-amp The n-channel MOSFET is driven by a control voltage VC acts as a switch. The control voltage VC is applied to the gate of the MOSFET ... called sample period. The time period during which the voltage across capacitor is constant is called Hold period.

1 answer
48 views

Description : Define roll of rate and order of filter.

Last Answer : 1. Roll of rate is the rate of change of gain with frequency. Roll of rate is always measured in dB/decade. 2. The roll of rate is called the order of the filter. It depends on the rate at which filter ... rate is -40 dB / decade or +40 db / decade then the filter is of 2nd order and so on

1 answer
160 views

Description : State the four advantages of active filter over passive filter.

Last Answer : Advantages of active filter over passive filter: 1. Gain and frequency adjustment flexibility since the op-amp is able to providing gain; the input signal is not attenuated as in case of passive filters. 2. ... and less bulky (due to absence of L ) and rugged. 5. Non floating input and output.

1 answer
37 views

Description : State the four applications of an instrumentation amplifier.

Last Answer : The instrumentation amplifier can be used for other application such as 1. Electronic weighing machine scale 2 .Light, intensity meter 3. Pressure monitoring & controlling 4. Temperature monitoring and controlling. 5. Process Instrumentation in measurement of physical quantities.

1 answer
106 views

Description : What is the threshold voltage?

Last Answer : 440

1 answer
1 view

Description : Complete the following sequence: 9 × 111 = 999 9 × 222 = 1998 9 × 333 = 2997 9 × 444 = ______ 9 × 555 = ______ 9 × 666 = ______

0 answers
4 views

Description : Why GRAB 555 the most trusted agent MalaysiaTRUSTED ONLINE CASINO MALAYSIAONLINE CASINO MALAYSIA TRUSTEDTRUSTED PAYOUT CASINO MALAYSIAOfficial By: GRAB 555?

Last Answer : Official by: GRAB 555TRUSTED ONLINE CASINO MalaysiaONLINE CASINO MALAYSIA TRUSTEDTRUSTED PAYOUT CASINO MALAYSIAtrusted online casino malaysia. online casino malaysia. casino online malaysia. online slot ... malaysian online slot. trusted payout casino malaysia. trusted payout online casino.

1 answer
1 view

Description : How do you round 555.55 to the nearest tenth?

Last Answer : 555.6

1 answer
2 views

Description : He sent 555 players back to the pavilion just 281 innings of 147 test matches and proved himself No. 1 wicket keeper: A. Boucher (SA) B. Gilchrist (Aus) C. Healy (Aus) D. Stewart (Eng)

Last Answer : ANSWER: A

1 answer
2 views

Description : He sent 555 players back to the pavilion just 281 innings of 147 test matches and proved himself No. 1 wicket keeper: A. Boucher (SA) B. Gilchrist (Aus) C. Healy (Aus) D. Stewart (Eng)

Last Answer : ANSWER: A

1 answer
4 views

Description : He sent 555 players back to the pavilion just 281 innings of 147 test matches and proved himself No. 1 wicket keeper: A. Boucher (SA) B. Gilchrist (Aus) C. Healy (Aus) D. Stewart (Eng)

Last Answer : ANSWER: A

1 answer
2 views

Description : He sent 555 players back to the pavilion just 281 innings of 147 test matches and proved himself No. 1 wicket keeper: A. Boucher (SA) B. Gilchrist (Aus) C. Healy (Aus) D. Stewart (Eng)

Last Answer : ANSWER: A

1 answer
1 view

Description : He sent 555 players back to the pavilion just 281 innings of 147 test matches and proved himself No. 1 wicket keeper: A. Boucher (SA) B. Gilchrist (Aus) C. Healy (Aus) D. Stewart (Eng)

Last Answer : ANSWER: A

1 answer
2 views

Description : He sent 555 players back to the pavilion just 281 innings of 147 test matches and proved himself No. 1 wicket keeper: A. Boucher (SA) B. Gilchrist (Aus) C. Healy (Aus) D. Stewart (Eng)

Last Answer : ANSWER: A

1 answer
3 views

Description : When a voltage of 124 VDC is applied to the illustrated circuit with a resistance of 17.8 ohms the current will be ________. EL-0018 A. 0.143 amps B. 2.555 amps C. 6.966 amps D. 141.8 milliamps

Last Answer : Answer: C

1 answer
13 views

Description : 355. A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m3 and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 ... to cool to 60°C is (A) 555 (B) 55.5 (C) 0.55 (D) 0.15

0 answers
6 views

Description : The following are true about spectral sensitivity of the retina: a. in scotopic conditions, the peak sensitivity of the eye is near 500 nm b. under photopic conditions the peak sensitivity is near 555 nm c ... light the retina has a peak sensitivity near 440 nm to a 25-Hz stimulus d. all above

Last Answer : all above

1 answer
1 view

Description : The following are true about spectral sensitivity of the retina: a. in scotopic conditions, the peak sensitivity of the eye is near 500 nm b. under photopic conditions the peak sensitivity is near 555 nm c ... light the retina has a peak sensitivity near 440 nm to a 25-Hz stimulus d. all above

0 answers
3 views

Description : The following are true about spectral sensitivity of the retina: a. in scotopic conditions, the peak sensitivity of the eye is near 500 nm b. under photopic conditions the peak sensitivity is near 555 nm c ... light the retina has a peak sensitivity near 440 nm to a 25-Hz stimulus d. all above

0 answers
4 views

Description : True statement about dark adaptation include: a. there is a shift in peak spectral sensitivity from 555 nm to 505 nm with dark adaptation b. rods are more sensitive than cone during dark adaptation c. biphasic changes only occur in retina which processes both rods and cones d. all above

Last Answer : all above

1 answer
5 views

Description : 3√7469 x √668 = ? a) 450 b) 300 c) 505 d) 465 e) 555

Last Answer : 3√7469 × √668 = ? = 19.5 × 25.9 = 505.05 = 505 (approx) Answer: c)

1 answer
129 views

Description : Amit sold an article for Rs 630 and earned a profit of 20%. Find the cost price for Amit. 1. Rs 555 2. Rs 535 3. Rs 552 4. Rs 525

Last Answer : 4. Rs 525

1 answer
92 views

Description : The Octal number to be given alogn with chmod command to make a file readable, writable and executable to the owner, readable and executable to group and others is: A. 000 B. 755 C. 744 D. 555 E. None of the above

Last Answer : B. 755

1 answer
27 views

Description : The average of the 3 digit number, which remain the same when the digits interchange their positions is. A) 444 B) 555 C) 666 D) 777 

Last Answer : B) Average = (111+222+333+444+555+666+ 777+888+999)/9 =(111+999)+(222+888)+ (333+777)+(444+666)+ 555/9 =(4*1110)+555/9 =4440 + 555/9 =4995/9 =555.

1 answer
269 views

Description : Draw a labelled pin diagram of IC-555 and state function of each pin

Last Answer : Pin Name Purpose 1 GND Ground reference voltage, low level (0 V)  2 TRIG The OUT pin goes high and a timing interval starts when this input falls below 1/2 of ... 8 Vcc Positive supply voltage, which is usually between 3 and 15 V depending on the variation.

1 answer
272 views

Description : Draw circuit diagram of Bistable multivibrator using IC-555 and explain its working.

Last Answer : Definition – A multivibrator which has two stable states, one can be change to other when trigger pulse is applied, known as bistable multivibrator. Circuit diagram of Bistable multivibrator using IC555

2 answers
85 views

Description : IC 555 is used for

Last Answer : IC 555 is used for Making oscillator

1 answer
56 views

Description : Timing resistor of a monostable using 555 is 100 kOhm. The timing capacitance (in nF) required for pulsewidth of 100mS is about  A) 100 B) 300 C) 600 D) 900

0 answers
3 views

Description : Have you ever tried the timer function on your kitchen oven?

Last Answer : I would guess a lot of ovens are different but with ours you just push timer then hold the time button for the amount of time you wish,once you let go it will start counting down then beep letting you know the time is up.

1 answer
0 views

Description : What service should I use for filing taxes? (first timer)

Last Answer : answer:With as simple a return as you appear to have, that is, with no mortgage or student loan or other deductible interest (is student loan interest even tax deductible?) and no other extraordinary income or ... - not one iota - for your cat. But I hope you enjoy its company. See, I care!

1 answer
3 views

Description : Why is my Blackberry continually showing a moving "timer" symbol every time I try to do something on it?

Last Answer : Have you tried to remove the battery and reset it? It could be the internet supplier or your internet connections on it. However, I am no whiz either. So there, I gave it a bash. It sounds to me like the net connection is timing out.

1 answer
0 views

Description : What are the "must-do's" in New York City for a first-timer?

Last Answer : answer:Make sure you hit up some of the museums. The Natural History museum in Manhattan is my favorite place on earth. http://en.wikipedia.org/wiki/American_Museum_of_Natural_History

1 answer
0 views

Description : Do you ever wish that life worked on your timer instead of you having to live according to it?

Last Answer : I would like to live on a 27 hour day. 9 hours of sleep and 18 awake would suit me perfectly.

1 answer
...