Switch Definition and 555 Threads

Homework Statement From the circuit diagram ( http://postimg.org/image/lldnr7mf7/ ) calculate the net charge flown through the capacitor 2. Homework Equations 3. The Attempt at a Solution [/B] I actually don't need to solve the full problem as i understand how, what i have trouble with is the...

I've been searching for one of these switches to no avail, perhaps any of you might know where i can get one? And it has to be a mini toggle switch because I am working with a very small space.

Homework Statement [/B] https://postimg.org/image/6dbwajk91/ (Image inserted by moderator to make it visible in-post) In the circuit the switch is closed for several seconds, then opened. Make a graph with the abscissa time in milliseconds, showing the potential of point A with respect to...

Suppose a hypothetical experiment consisting of a lamp that is situated some where on the moon connected to a battery some where on Earth through an ideal conductor(with no losses at all) assume that we turned off the circuit at some time t0 how long it takes for the lamp to illuminate Or that...

Hello all, First off i have no experience nor knowledge in engineering whatsoever but have always had a knack for things of its nature. Currently I am a chef of over 10 years lol I would like to know what I would be getting into if I do pursue this career path, considering most of my family on...

Homework Statement (a) In the circuit shown below E is a cell of source (internal) resistance r and the resistance of R is 4.0 Ω. With the switch S open, the high resistance voltmeter reads 10.0 V and with S closed the voltmeter reads 8.0 V. Show that r = 1.0 Ω. (b) If R were replaced by a...

Suppose we are given this definition of the wedge product for two one-forms in the component notation: $$(A \wedge B)_{\mu\nu}=2A_{[\mu}B_{\nu]}=A_{\mu}B_{\nu}-A_{\nu}B_{\mu}$$ Now how can we show the switch from tensor products to wedge product below...

Hello friends I'm new here and want some answers from u. please help me to sort out the problem related to my circuit of high voltage protection. in this circuit i regulate the dc voltage using zener diode and then output of zener is given to the base of npn transistor. please check the circuit...

Homework Statement Homework EquationsHEAT PRODUCED=WORK DONE BY BATTERIES - ENERGY ABSORBED BY CAPACITORS The Attempt at a Solution INITIALLY BEFORE SWITCH CLOSED :Initially a current flows only in the left most loop involving 4 microfarad capacitor.The charged on the capacitor during...

Hi everyone, I've been trying to design a 12:1 2.0 USB multiplexer for a while, with very little success. I've bought a couple of MAX4999 8:1 multiplexers, trying to use two of them in parallel such as shown in the datasheet. I've put them on a breakout board from Adafruit, and started testing...

I'm going into chemical physics for undergrad, but I'm worried that would hinder me in grad school if I decide to switch fields. Is it something to be concerned about?

Homework Statement Given the circuit of sinusoidal current (attachment1) with given data: \underline{Z_3}=200(3-j4)\Omega,\underline{Z_4}=100(3+j20)\Omega,\underline{Z_5}=100(3+j4)\Omega,\underline{Z}=100(2+j5)\Omega,\underline{I_{g2}}=-10(2-j)mA. After the switch is closed, the increment of...

Error is like " no PSPICE template for 2N6798 ， spark gap switch how to find the .ilb of spark gap switch and 2N6798? thank for your help.

Linear actuator spec.: 400mm stroke, 6000N, 2 limit switches, 5mm/sec, 12V DC supply, BIBUS IP65 casing. One of the limit switches of my LA (Linear Actuator) seems to have burned out. This happened because I accidentally plugged the LA leads into the AC mains socket (my LA is rated to run at...

Homework Statement Let's say I have a circuit such as the one above, and let's say the circuit has been open for a long time. How would I find the current through the inductor, the instant after closing the switch? and the voltage potential across the 40 mh inductor? Homework Equations...

Homework Statement Some light-dimmer switches use a variable resistor as shown in figure. The slide moves from position x = 0 to x = 1, and the resistance up to slide position x is proportional to x (the total resistance is Rpot = 100Ω at x = 1). What is the power expended in the light bulb if...

Homework Statement Homework Equations Rparellel=1/R1+1/R2... IR1=R2/R1+R2 x I The Attempt at a Solution I am unsure of how to answer d) and e) using KVL because I count 4 junctions? Where should I start?

This is a on off switch for a McIntosh 2120 stereo power amp. It is a snap switch of sorts built in a potentiometer case with the switch attached. The shaft is 25mm. Due to the fact that it closes a relay I don't think it has much current running through it. I just can not seem to find anything...

Hello, I have a bit of a problem with my project and it is as follows: I am trying to discharge a capacitor bank (2x 470uf 400V capacitors in parallel). I tried making a MOSFET switch to use that as a switch, but it kept burning out the mosfets (they were rated for 600V and around 100A), then I...

Homework Statement The circuit consists of three identical light bulbs and two identical coils, connected to a DC current source. The ohmic resistance of the coils is negligible. The system is left to settle into a steady state and then the switch S is opened. Describe and explain in as much...

I watched many videos and read bunch of answers about this, but I was having a hard time finding an answer to this one point: What is the exact moment an organism realizes that it is under an attack? I understand that there might be a few different types of ways a body can react too. So far...

For the circuit shown in the figure, the switch S is suddenly closed with the capacitor uncharged. After one time constant, the charge on the capacitor is closest to: a) 2.0 mC b) 0.74 mC c) 1.0 mC d) 1.3 mC e) 0.00 mCRelevant Formulas q = Q⋅(1-e-τ/R⋅C) τ = RC My Attempt q = Q(1-e-τ/T) q =...

Hi, I'm currently studding a module on PLC and have a question on "what will happen if you do this ...". As I don't have a problem with explaining operation of each rungs of the ladder diagram I need some help on explaining the function of the reverse relay and travel limit switches. Can anyone...

I have tried to reset my unmanaged switch (Cisco Linksys) by recycling its power several times but everything becomes the same. My computer can't retrieve the IP address delivered from it that is set up with DHCP mode. If I connect my computer to the main router (the one that is connected to the...

I am reading The Art Of Electronics, and I realize this is more of an encyclopedia rather than a textbook. I have referenced other sources as this has mainly served as a compass for me to learn about each subject area. My question is fairly simple and straightforward. I'm using multisim to...

I am looking into different methods of power supply's when I found out about switch mode power supply's. These are the type of supply's that you have in your phone charger (or at least i believe so). The type of supply I need, is something that can supply a voltage of 2.5 volts @ 70 amps, and...

Good Evening, I am not a science "professional" nor even a Physics Graduate. I am, however, interested in anything with a science twist. I have created an account on this forum hoping that someone can answer my puzzing question... Start with the simplest circuit. Battery, switch, two wires and...

I need to trigger an electric imp to wake from deep sleep on the event that a liquid level sensor is exposed to water and send an alert to a user. This device periodically wakes up out of a deep sleep state and connects to a server to log sensor data (temp, humidity, light, water level in the...

https://qph.is.quoracdn.net/main-qimg-c22d8aa4be4fc2ed9b2f1c7060982e04?convert_to_webp=true How to find value of U on R2 long time after switch is being closed? Capacitors are charged so there is no current going through? Or? I used kirchof rule so i get Uo+Uc1-U=0 U=Uc1+Uo...

In flights during landoff or takeoff they say to keep the phone in flight mode and then switch off so as to not interfere with the aircraft signals. But why should we switch off if keeping the phone in flight mode? Flight mode disables cellular and wifi networks.

Hi, I have two sort of switch one is 5 pin (push type) switch and the other is 2 pin (on/off) type switch for my vehicle. Can I use first one instead of On/Off switch. In continuation, If I have two wires on which any of mentioned switch is to be applied, then How can I use 5 pin switch on that...

How battery cut off switch works?? How to apply Battery cut off switch on a vehicle..?? I want to make some electric functions to be operated if the battery is cut off. For this what should I do..??

if we assume the condition immediately after switch is closed (t=0+), *Capacitor voltage cannot jump. *Inductor current cannot jump. dv(0+)/dt=i_c(0+)/c di(0+)/dt=v_l(0+)/L which means we can find the initial condition of the post-zero system algebraically. However, it contradcits to the...

Homework Statement Firstly, this is more of a schoolwork issue, not coursework or a set task. It is more to do with understanding the circuit seen in the image provided: I am trying to understand why this circuit does what it is supposed to; activate the lamp when a certain light intensity is...

I have an old firelpace, and the main switch (originally a circuit for a variable resistor) broke and the old owners just rewired around the circuit board(cut the lines from it). I want to place a switch on one of the the lines. But the only switches I found were all rated at 3A 125VAC, 1.5A...

I have a question that how ignition switch works. Is it is directly connected to battery..? or Alternator..?? Further If I apply a Battery Cut-Off Switch, will ignition works when Battery Cut-Off Switch is off..??

Hi folks, I would like to clarify few doubts on my mini-project as mentioned below: I am designing a small kit using a transistor (2N3904) and an OP-AMP (LM741- Voltage follower) with few resistors connected to them. My power supply voltage value is 5V. Please refer to the below picture for...

My grandma recently gave me a relatively new Cisco gigabit ethernet / network switch because she never used it. Here are the devices that need to be wired: Here is the current setup: Internet / Wifi Modem upstairs, my bedroom / "tech studio" is in the downstairs / basement of the townhouse...

Once you flipped the switch how quickly does the electricity reach the light bulb? I've read somewhere that it's at the speed of light but I might be wrong, I've also read somewhere that electrons flow very very slow so I can't understand how will lights will turn on instantly.

Hello everyone! I am 3rd year Mechanical Engg. student at one of India's good institutes... I want to switch from Engg to THEORETICAL PHYSICS after my Undergrade. But I don't know how to start or what would be the proper way to study on my own Ug physics. It will be very helpful if anyone can...

Double Busbar Scheme for outdoor switch yard system (132kv) step up power plant Hi friends 1. in this system both busbars energized all the time. 2. what is the meaning of main BB and transfer BB, 3. step up transformer connect main bus bar all the time or both BB connected through DS switch ...

Hi Everyone, I could do some advice on wiring up a Piezo touch sensitive switch. I'm in the middle of building a desk PC project and thought it would be a nice touch to have a touch sensitive power switch, so I've bought a nice shiny touch sensitive illuminated Piezo switch and can't figure out...

hey hey :) So this is the code i came up with %% part 2 x=[1 2 3 4 5]; % 1 is freshman % 2 is softmore % 3 is junior % 4 is senior % >4 is super senior for i=1:5 s=input('number: '); switch s case 1 yearNumber='freshman'; case 2...

Homework Statement Assume that the switch in the figure has been closed for a long time and opens after in t=0. Find Ix in a) 0- b)0+ c) 40ms The Attempt at a Solution Switch is opened in t=0, current flows only in the 10Ω resistor, Ix=3v/10Ω= 0.3A-> 0- 0+ --> 3v/10=0.3A Not sure if both...

I just installed a backup camera on my motor home , which is triggered by the reverse light wire. I would like to add a switch to the circuit so while I'm driving or just to be able to turn on the backup camera (using it as a rear-view mirror) without putting the vehicle in reverse. I probably...

anorlunda submitted a new PF Insights post What Happens When You Flip the Light Switch? Continue reading the Original PF Insights Post.

I am a new user of Multisim and I am trying to make a buck converter. In other softwares, such as pspice I was able to control the switching frequency by editing properties but in Multisim, most of the switches are user interactive. I want to set frequency of 50 Hz in a switch. Kindly help me...

Homework Statement A conducting sphere of radius a is surrounded by a neutral conducting shell of radius b (b > a).Connections are provided as shown in diagram. Initially, the sphere has a charge Q. The switch S1 is opened and then closed. The switch S2 is then opened and closed. Finally, the...

Good day , could someone please point me to a device that would have say two wire terminals and could interrupt the flow of current between them when a dangerous temperature is reached? the idea is simple , I built a lamp and I need some failsafe mechanism that would turn the lamp off when it...

I need a switch that will alternate the flow of electrical current between two diverging wires at a decided rate. Are there switches that function this way? What are they called?