Switch Definition and 555 Threads

I am less than a novice regarding electronic issues and understanding circuits , and need help in terms of seeking a component. I am looking for a solid state component---?? ic--- that would act as a SPST switch. This switching device would be inserted into a simple dc circuit--( approx 10-15...

I am wanting to make something that allows me to open a valve to turn water on or off. I am wanting to figure out a way to make my system somehow that would use maybe an alarm clock or some sort of digital timer to send a signal to a receiver that then would open/close a valve. I guess it's...

Ive been working on a new project for my studies but can't seem to get any info on 'switch bounce'

Hobbiest here trying to make a rotary switching system to switch between a 1000w DC power supply and an external DC supply of the same input plus an all turned off position. The first power supply is running at 12 vDC and the 2nd input could be anything from 8-36 vDC. I can find rotary switches...

Greetings everyone, I'm trying to figure out how I can take an old Rock Band kick pedal and make it activate a button in a controller. I've uploaded pictures to help explain. Simply put, I want to make the kick pedal which already has some sort of pressure switch in it to activate the button...

i am trying to design a switch that will output an active high if the width of the received PWM signal is greater then 1500 uS. if it is shorter then this time then it should output an active low. The frequency of this signal is 50 Hz. I designed a RC circuit with a cutoff frequency of 50...

i'm trying to make an optical switch circuit. i'm no expert on electronics, so i was hoping you people could give me a helping hand:) in advance, thank you very much:) the purpose of the circuit is to switch an inductive load such as a relay. when the light is blocked i need the relay to...

Hello, I am having a lot of trouble deciding if I should switch to a physics degree or not. I am currently in Electrical Engineering, about to finish my second semester, (first year.) My thoughts on switching to physics having nothing to do with a dislike towards engineering, I very much like...

Hi all. First, I'm pretty new here, so I apologize for any faux pauxs I might make. Anyway, I'm a freshman in college right now, and my current major is chemistry. I don't really know if I want to stay in chemistry though, because I only ever want to work on my math class and german class...

Hello, I have an ONAN OTUDD100-4/1201C (Serial j810595543) automatic transfer swicth for a 30 KW 120/240 V 3PH Generator. The control panel is also 3PH. Nonetheless, the power company electric supply is 120/240V 1 PH 3 Wires. My issue is: 1. When we connect the above-mentioned current...

Homework Statement Consider the circuit shown in the Figure, where R1 = 29 and R2 = 4.8 . http://www.webassign.net/walker/21-44alt.gif (a) Is the current flowing through the battery immediately after the switch is closed greater than, less than, or the same as the current flowing...

Hi. I'm currently a 4th year phd student in astrophysics, studying compact stars. I'm from China and am now an exchange student in US. What I'm asking is: if I really have more interest in theoretical physics, do I still have a chance of entering the field? I'm now in a very confusing stage...

Could anybody point me towards a component that could serve the purpose of a non touch switch. To explain it better, one that would trigger when an object or hand were to be placed within say a few centimeters away from it - capacitive switches I've seen all work by touch. Id like an array of...

As a hobbyist I have had an interest in SMPS power supplies for quite some time, but have never gone past casual study of them. I understand the theory, but have difficulty with the actual implementation of things like a high-side switch mechanism for a P-Channel Mosfet. My goal is to...

Homework Statement That's right, Maple is the dumbest program in existence. Everything I try to erase a line by hitting delete or backspace, it won't disappear. When I want to use an function, I have to load a package ex. "Student Linear Algebra" to use a certain command. Sometimes the...

What is the difference between switch statement and if statement?

I am early in my career working for a small niche company right now, doing a lot of mechanical design. It seems like great experience to me; I am learning a lot about machine parts, manufacturing processes, and drawings. However, I might have an opportunity to move into a large, well-connected...

Similarly to air switches in hot tubs, I am looking for a UL Certified product that includes a SPDT switch, relay and transformer to plug into a standard 110V 15A outlet. The relay would be energized by the low voltage from the transformer and activated by the SPDT switch which would then switch...

Hi, I have forgo my previous idea of Tesla coil as my final year project and now moved on in doing an AC power meter monitoring, which monitors the kWh, voltage, current consumption of a device and remotely controlled switch to turn off/on the device.This power meter should be implemented like a...

I am trying to put together an inductive proximity detector for Rail Wheel detection. Currently we use an oscillator connected to a coil. We then count pulses on the oscillator and measure a detect when coil saturation changes the pulse. There are similar industries that use NAMUR...

Hi Please don't give me another warning for posting in a wrong forum. Seriously, in my view this belong here in "General Discussion" forum. Where I'm placed these days here we have electricity blackouts several times a day, sometimes for as long as 3 hours at one time. My laptop could run...

hi,, i m building this IR receiver circuit, to work as a switch for electrical appliances such as a lamp,, so when i send an IR beam to the circuit, the lamp should turn ON and stay ON even the beam is no longer present, but it should turn OFF when i send IR beam again. Which relay...

ok looking at datasheets for mostfet there is source/drain rise and fall time. does this only depend on the voltage rise fall time of the gate? so if you apply a voltage to the gate it will take a wile until the voltage of the actual gate reaches that of the applied voltage because of...

I'm trying to build a switch that is closed only when the input signal is roughly the same signal over some time. So when ever the frequency of the input changes by a significant amount the switch opens, and when the input frequency is roughly constant the switch is closed. I'm building this in...

I'm studying the second year of a chemical engineering degree. I have always loved mathematics, and I am pretty good at them, and since the beginning I am not satisfied with the engineering approach to mathematics, I would like to learn some more complicated math, but I'm not quite sure if I...

Can anyone recommend a push button switch that fits into a breadboard from mouser.com? I just want a push button switch that I can use to switch between Vcc and ground to use as the clock for a counter, but there are so many switches on mouser and I'm not sure which one to get. Can anyone help?

I am trying to figure a way to hook up a timer to my pellet stove. The control board of the stove has an "on" button and a separate "off" button. The on button is a push button switch. My question is: is there a programmable timer that closes a circuit for a second and releases the switch like...

need help else, else if statements... switch case.. need help on the bottom where tryin to define bonusContribution // Marcus Molineaux csit 802 assignment 3 t th 645 #include <iostream> #include <string> #include <iomanip> using namespace std; int main() { int tiksold; double...

Homework Statement I want to find ix in the circuit below when the switch opens at t=0 after having been closed for a long time.Homework Equations v(t) = v(infinity) + (v(0)-v(infinity))e-t/RC i(t) = C dv(t)/dt ix = isource - i(t) v(t) = voltage across capacitor i(t) = current through...

Considering a "switch" to theoretical physics I'm a math major with 5 semesters left as an undergraduate. My math "profile" is very strong: lots of graduate classes (commutative algebra and algebraic geometry, homological algebra, higher homotopy theory and homology theory, representation...

Homework Statement The switch in the circuit has been closed for a long time before opening at t = 0 a. Find i(t) across R3 for t>0. b. Find i(t) across R2 for t>0. I have attached the circuit. Homework Equations The Attempt at a Solution The only thing I know for this problem...

Homework Statement There are three vertical metal strips (Steel, Aluminum, Steel) between two horizontal rigid bodies alphaa = 12.5 E-6 /degF -- coefficient of thermal expansion alphas = 6.6 E-6 /degF Ea = 10 E6 psi -- Young's Modulus Es = 30 E6 psi The original dimensions of the...

Hi all, I have a problem with an analog switch DG201 in my analog design circuit. The circuit has 2 input at the early stage, v(t) and i(t). v(t) will be changed into TTL square wave and go through a sample and hold circuit. And the i(t) will be go through the sample and hold circuit as well...

I'm sure there is an easy solution to my problem, but I very little electronics background and don't yet have a breadboard to even experiment on. In fact, it was only two days ago that I learned a 555 doesn't need to (or can) be programmed by a computer to use. I want to make a buzzer that...

Homework Statement There are two rigid plates on the ends. In between them are two steel plates and one aluminum plate. The aluminum one is in the center. When the temperature increases enough the aluminum will buckle and touch one of the steel plates to close the circuit. alpha(alum)...

I have a carraige being operated by a transmission drive on a 120v 3ph 2hp motor. I am using a magnetic contactor, followed by a reversing drum switch (a later addition when they didn't want to push the cart back after each run). Now they want to add a switch down by the end of the tracks to...

Hi all, I would like to make a simple remote control on / off switch. It is for a string of LV leds. 12 V and 0.24 amp running from a battery supply. I would simply like remote switch instead of a toggle so no one else can fiddle with it. Can anyone help me, I have been scouring the...

standard/wifi "light switch" schematic Electrical engineers, I would like to learn more about circuits, wireless applications, and their integration with computer software. So I've come up with an idea to bounce off of you. I would like to be able to create (and eventually install) a wireless...

Hi..anyone here can explain to me what is the function of this device DG201 CMOS QUAD SPST ANALOG SWITCH? I had search using google or yahoo search machine but still can't find any site explaining this device. So if you know what is it please tell me or paste the link for me here. I dun want the...

Hey guys, I know this is predominately an american centred forum but I was wondering if anyone could give me some advice. I've completed the first year of a Theoretical Physics 4 year course at Durham (in the UK). However with the modules that I chose I do still have the option to swap over to...

Homework Statement Doing a DE and need to solve for y, just wondering about this particular case. Homework Equations ln ((2y-1)/(y-1)) = x for y The Attempt at a Solution Wolfram says the result is...

What I'm tring to do is connect FAN 2 Wiring (673 DKBLU 2nd picture top diagram) to The Auto pole of the AUTO/ON/OFF switch so I can manually activate the FAN if needed. I'm a little confused since in the 2nd pic, I don't see a Negative side to the coil on the relay. Can/will this work?

Hello, I do not know what I am looking for other than a relay, but what I need is a way to have this puff switch http://www.mansionathletics.com/puff-switch-physical-education-recreation-children-special-needs-ability-switches-action-37294.html?channelid=Yahoo%20Shopping turn on a...

This relates to another thread about trains and manhole covers at relativistic speeds falling (or not) down gaps that would be normally be too small. Consider two hollow cylinders aligned with each other along their long axes with a short gap between the hollow cylinders. They are designed...

In this hypothetical, an experiment is going to be conducted concerning the repositioning of clocks. two clocks are placed at the leading end of a vessel, that is 1 light second long, to an observer at rest relative to it. This vessel is shot into space from an observation station at...

This is a paradox that I have derived based on my understanding of relativity of simultaneity. Upon someone resolving it, I should be better able to understand the concept, which seems rather contradictory of the greater theory at this point in time. If events are considered to be...

Alright, I came here looking for help as I haven't been able to figure out the answer. in that picture the left is the bronze colour prong, following two are silver. There are numberings for each prong going 3-2-1 respectively from left(bronze, BUT the bronze pin has both a + and - sign...

Hello, I am seeking advice on how to use an accelerometer as a switch on a CubeSat form factor. Incase you are unfamiliar, a cubesat is 1cm cube device designed to go into space. The problem is that the CubeSat must not have any electronics active during launch. I am seeking to use an...

Homework Statement Why is it that the output is equal to V+ (when the switch is open) in diagram A, if there is no current flowing? Why is it that A (1/0) is used by convention? I mean the lamp I got at home has a "0" for off and "1" for on, on the switch. This is confusing me...

A bill is being introduced in the U.S. Congress aimed at addressing Cyber threats. The bill, dubbed, "Protecting Cyber Space as a National Asset" or PCNAA, gives authority to the executive branch over the internet. A popular tag for this bill, is the "Internet Kill Switch", for the power it...