Switches Definition and 81 Threads

I'm working on a project in my job, but being only a student in CE and Comp. Sci. I'm limited in knowledge. I'm looking for a way to communicate with an arcade game, with a standard PS/2 Keyboard. Eliminating the standard joystick and buttons and using a keyboard instead. What would be the...

I'm pretty sure that one of the most common electronic switches is the transistor. That being said, I'm not very sure of how you can incorporate one into a circuit. Basically, what I'm asking is, how do I get it to switch when I want it to? How do I use a transistor?

Hi all, I'm in a big trouble finding a switch that discharges a capacitor with 20kV on it. My circuit requires to do this very qwickly (tens of nanoseconds), but I cannot use a single switch because the only existing one that can allow this voltage is a Thyratron, and I don't want to use...

do all double pole switches hav an 'off' position? what is the operation of a transfer switch? what is the most common application of a three-way switch? what is the most common application of a 4-way switch?

Hey guys, I just started a networking course and I'm pretty bogged down with information that I'm trying to put into a rational context. From my understanding, networking first began with the telephone line, which is pretty straightforward. You have the sender and the receiver. Then there was...

Can anyone please explain to how one can use a set of BCD switches on a PCB and use them as a clock source? Thanks.

i am designing a stepped attenuator using pin diode as a switch in microwave office. i am having difficulty in using pin diode as a switch. i knw it is operate in forward bias and open in reverse bias. if i am giving a rf signal between 300 Mhz to 3 Ghz then how can i switch it to reverse bias...

Can someone tell me how DIP switches work in circuits? I had an issue with a printer and saw that I had to change one of the DIP switches to change a setting. How do they work in a circuit? I remember working in VHDL and there were also switches on a FPGA board (I don't know if those were also...

HDMI / Component Video "Switches" Hi guys, I just entered the HDTV realm and I'm having a little difficulty setting up my system. I don't have any place to put old extra TVs, so I have three (no, the girlfriend doesn't like it) TV's basically side by side. Are there splitter switch things so...

Homework Statement A circuit containing three switches, labeled S1, S2, and S3. Find the current at a for all possible combinations of switch settings. Put = 170 V, R1 = 30.0 , and R2 = 10.0 . Assume that the battery has no resistance. (S1, S2, and S3 all open) (S1 closed, S2...

Homework Statement Two capacitors, one with C1=2pF and V1=30V, and the other with C2=3pF and V2=20V are connected to each other through a switch (positive end of one connected to the negative end of the other). The other end of each capacitor is kept open. What happens to V1 and V2when the...

have been told there is a way to make this mystery below work and can't figure it out. I know it wouldn't be up to code and i would never do it but if someone could hook me up with a wire diagram of how its done i really appreciate it. I am pretty sure switching the neutral is involved...

Homework Statement http://i.imagehost.org/view/0578/bulbsb Consider the current flowing through bulb 1. In each situation, does the current through bulb 1 increase, decrease, or stay the same. 1. All switches are closed, then switch 1 is opened. 2. All switches are closed, then...

As part of an engineering design project, I am using shock switches to measure accelerations of an object. As the name suggests they are just switches that turn on when a shock above a certain value is experienced. Does anyone know the details about how the switch contact is closed when it...

Hi, Here is my problem, I am using a circuit with two SPDT switches that I would need to make work in phase. I would like to activate the two SPDT switches with an another SPDT switch in order to put the two first PDT in one position at the same time (the use of only one external switch is...

Almost 20 years since I took Electronics in night school. I have a 12V circuit with two lights and two switches. I want: - S1 to light up L1. - S2 to light up both L1 AND L2. How can I do this? (In case it comes up, I do NOT want to run a second wire to one of the lights (like...

Hey, I am looking for a good book on complex analyis (complex calculus, "complexe anlysis" in german). Any recommendations? I am a first year Electrical engineering student at the ETH Zürich. It should cover the following, and have a reasonalbe amount of examples: Analytical Funktions...

Homework Statement The capacitor in the figure below has a large capacitance and is initially uncharged. After the switch is closed, what happens to the lightbulb? You can't paste the figure but it is a circuit with a capacitor paralled to a battery and in series with a lightbulb. a...

017 (part 1 of 2) 10 points For a long period of time the switch S is in position "b". At t = 0 s, the switch S is moved from position "b" to position "a". Find the voltage across the 1 MΩ center-left resistor at time t1=5s. Answer in units of V...

I am trying to make a reaction test circuit where a LED comes on at after a random amount of time and the slowest player gets and electric shock. The switches they press turn on a relay to another circuit connected to the device which shocks them. I need to find a way to stop the slowest...

I have to make a circuit which works like this : I'll have some buzzers (just bulbs which glow when switch is pressed); as soon as one buzzer is pressed, others stop working till the first switch is released. I don't have an experience of making circuits, except the easiest ones made in school...

Homework Statement you're driving behind a car and wish to pass, so you turn to the left and pull into the passing lane without changing speed. why does the distance increase between you and the other car you are following? Homework Equations The Attempt at a Solution so in...

Lenz's and Faraday's Law Induction. Help on resistor and switches! Homework Statement Find the direction of the current in the resistor shown below a) at the instant the switch is closed b) after the switch has been closed for several minutes and c) at the instant the switch is opened...

I'm not very experienced with electronics so this might be a simple question: I have a tool that outputs signal information through a serial cable. I have two devices that connect with it, so I physically pull the plug and switch connections when needed. However, I would like to create a...

Had a bit of a dispute with a friend over the possibility of a circuit and what it could do... I could be wrong, but I don't see how this is possible - He claims that it's possible to wire a circuit containing three switches and a light, and have it so that any of the three switches can turn...

I heard that a dimmer switch/knob/potentiometer used to control the lights in a house, for example, uses the same amount of power no matter if it is just barely on, or turned up all the way, so it really doesn't matter (energy usage wise), what the switch is turned to, it will use the same...

You are in a room with 3 switches which correspond to 3 bulbs in another room and you don't know which switch corresponds to which bulb. You can only teleport to the room with the bulbs and back once. You can NOT use any external equipment (power supplies, resistors, etc.). How do you find...

Here's an easy riddle: You are in a room with 3 switches. The room is adjacent to another in which there are 3 lightbulbs. Each of the lightbulbs is connected to a switch in your room. You cannot see into the other room. You may manipulate the switches in any way you like, and you may go to...

You are in a room with 3 light switches. These switches are connected to 3 separate light bulbs in an ajoining room. Access to the ajoining room is via a door that remains closed, there are no windows, other people etc etc. You are allowed to enter the ajoining room once and then return. At...

I have two UPSs, UPSA & UPSB, and two static transfer switches, STSA & STSB. UPSA feeds Source1 on STSA (preferred) and Source1 on STSB. UPSB feeds Source2 on STSA and Source2 on STSB (preferred). Each UPS has approxiamately a balanced 15KW load. Each UPS has 4 downstream transformers...

Although low temperature superconducting (LTS) switches are pretty common nowadays (used in MRI magnets etc), HTS switches are far less so, in fact I'm wondering whether the one I built recently is the world's first? Does anyone know otherwise? Does anyone care? (I doubt it). Also, is this...