Hi, I am new to electronics although I am an electrician by trade. I need to know if there is a way to switch a load electronically. It needs to switch from one load to another. I also need to know if there is a way to monitor current flow so that it switches when it hits a specified current. Thanks in advance Edd

Hey i just went and bought some flip switches at radio shack and i am installing it on an old keyboard i have. i connected the wires fine and when i touch the wire it makes the sound i desire, but when i attach the wire to the switch nothing happens. I just want to know what i am doing wrong and what the correct way of attaching the wire to the switch is. Thanks.

I have five existing wall lights that are hard wired to a single switch, running on 230v a/c It's impossible to run alternate wiring as it's all embedded in the walls (which are three feet thick.)   I am going to convert each light to be dual-function, with (a) background candle-LEDs and (b) a couple of 5w LED spotlights Already I have acquired 12v LED drivers and step-down transformers (12v to 5V) for the candle LEDs.   What I wanted to figure out was some electronincs to allow me to control them all by using the existing in-wall wires and perhaps replacing the wall switch with a push-button switch. What I had in mind was to be able to achieve different functions sequentially, possibly using an IC like a 4017. However, I'm only a beginner at electronics, and I haven't been able to figure out a way to do it.   One sequencing that would be effective, commencing with an all-off situation, would be:   1st press = candle lights only on   2nd press = LED spotlights on (Candle bulbs remain on)   3rd press =  All off   Cycle then repeats.   If this proves to be impossible, I also considered the idea of short and long presses, which could trigger a timer for the long press to acomplish some switching   The power of 230v a/c will also be travelling down the same wires to give power to the 12v LED drivers in each lamp, so I'm actually talking about sequential presses on a 230v a/c circuit.

Basically I want to make a toggle switch to trigger a circuit from on or off. its hard to explain but when the switch is in the on position it triggers a circuit momentarily. When I switch the switch off i need it to trigger the circuit again. Its for a 4 wheel drive module for my bronco and its momentary push buttons that I want t o convert to a toggle switch.

Hi, Just wanted to know if a momentary switch (normally open) could be used as a on/off switch with out using a relay.  thanks in advance :D

I have a question for the electronics gurus out there. I have a circuit that I want to activate for a set length of time (I'm using a 555 timer for this) when a door is closed and not operate again until the door is opened and then closed again.  I'm an electronics newbie.  The one-shot 555 circuits I have seen rely on using a momentary switch, but in this case the switch will remain closed as long as the door is so the circuit will remain active.  Are there switches available that will close and open while remaining fully depressed?  Or is there an equivalent circuit that will work with an ordinary momentary switch? Two more things:  the door is very small so the solution must be small; also the circuit will run on batteries so the solution can't be a power drain. Thanks in advance, I hope this makes sense to someone! Kerry

I am building a backlit keyboard, and I wanted to hook it up to a switch. How would I make it from the USB, or the default connector, to a switch?

My dad is redoing his basement and he wants to have a panel of switches with leds above them.  so that when the switch is on the led above it is on to.  does anyone know how to do this?

I'm doing a school contest with a car which requires a toggle switch. I'm gtoing to use a dcd to dc converter to give me an edge. The only problem is that it needs to be a momentary switch. whenever you push the switch down it goes on. Whenever you push it down again it turns off. Any idea for a circuit so that a spdt (3 pins) toggle switch will act like a momentary switch each time it's flicked for a time like a second?

Good day, Please i have 2 bulbs/leds, one is green and the other is red. I want to put a time switch between them so that after 10 minutes the red switch off and the green lights up and vice versa till i switch it off. So do you know of any switch that i can use for that purpose, that will operate under 12v, like 5v. Please thanks

I was wondering if they make infrared activated switches, so its like wireless. if they do where can I get them, I've seen those 10x things but they don't really appeal to me.

I need to learn how to build a wireless switch that can turn something on like lets say a coilgun. I need it to be wireless so that i can stand back behind cover and fire my coilgun and do other things without harming myself or my classmates.

Hi, I want to build a Auto-Switching circuit. I would appreciate if you could help me on circuit. Sorry for my ignorance in circuit design. There are two power sources A and B. The A is 12v and B is 3v.I would be utilizing the power from A only when B is turned On. So an auto switching circuit is required in this scenario. The circuit should sense if B is On, if so it should let A On.

What is the minimum amperage rating needed for the fire switch and what will happen if u use something lower, like a 20a light switch? also how much one would cost would be nice to. i have heard that 40 or 50 A will work, but i would like to use something smaller, easyer to find, and more affordable. any help would be nice.

Hello from France,I would like to build a simple voltage amplifier BUT remoted by a blueTooth switch.What kind of materiel do i have to set on my board circuit for this bluetooth connection ?Thx

I have some solar panels that produce 3v at 175ma. I was wondering if i could somehow make a switch to have it turn on when the panels are producing at least 100ma. Maybe also a switch for 150ma too :) Any ideas?? If additional voltage is needed it shouldn't be a problem :) Thanks!

I am trying to figure out a way to make a switch that is activated by a UV light. I have looked all over the web and cannot find a thing on this subject. The reason that I am trying to do this is that I recently purchased a Sonic Screwdriver that  has a IV light in the end and I was wanting to make it turn on/off things with the push of a button.

Hi, i'm a bit new to electronics. I was wondering if its possible to turn on the flow of current by another electrical signal. Yes, i know about transistors and relays but these switches turn off as soon as the second current is stopped, how to make this change in switch permanent, i'll be precise, i'm working on a laser alarm system, and it works fine, but the thing is that when i block the laser, sure the buzzer goes off, but when the obstruction is moved, the buzzer turns off, how can this be kept on until turned off manually by a switch. i know it must be quite simple but i dont know, please help thanks

I don't have time to do the research right now, but I am going to make a projector mount that comes out f the ceiling, does anyone know how to set it up so that when it reaches the bottom the motor auto stops. It will be a two way switch, one for up position and one for down position.

Thanks for the Bait & Switch.... Page prices for quarterly are shown as $3.95 per quarter. So I selected it, as it would be cheaper than the 2 year term over the same period. Got to checkout and it was switched to $11.95 a quarter.....so I was forced to purchase the 2 year plan....trying to save a few dollars on the subscription you know. Feel free to refund the difference between the $3.95 per quarter(advertised on your site)  for 2 years opposed to the $39.95 I had to pay. THANKS AUTODESK!

I was wondering if theirs a type of simple cheep switch that would do this: electricity is turned on, a switch completes a second circuit but when original electricity is turned off the second circuit stays on. The first circuit gets power from an outlet but the second circuit runs on a battery But in diagram (I used paint it's the best I can do) I have both running on batteries. Dose any one know of an electrical component that would do this? Or is their any way I could build one for cheep? Thank you.

I have connect Arduino with wave shield and 2 switch buttons to play wave when the buttons are pressed but it played it automatically with out any press and it repeat I don't now why .. void loop() {   trackNum = findGPSLatLng();   Serial.println(trackNum);     // Get if a button was pushed   buttonState1 = digitalRead(buttonPin0); buttonState2 = digitalRead(buttonPin1);        if(buttonState1 == HIGH && previous1 == LOW && millis() - time > debounce)   {     audioSelectFlag = 1;   }   else if(buttonState2 == HIGH && previous2 == LOW && millis() - time > debounce)   {    audioSelectFlag = 2;   } time = millis();     //  here is the wave files to play   switch (trackNum) {     case 5:     if(audioSelectFlag == 1  || audioSelectFlag == 2)         playcomplete("1.WAV");         break;         case 1:       if(audioSelectFlag == 1)         playcomplete("1.WAV");       else if(audioSelectFlag == 2)         playcomplete("1b.WAV");       break;     case 2:       if(audioSelectFlag == 1)         playcomplete("2a.WAV");       else if(audioSelectFlag == 2)         playcomplete("2b.WAV");       break;     case 3:       if(audioSelectFlag == 1)         playcomplete("3a.WAV");       else if(audioSelectFlag == 2)         playcomplete("3b.WAV");       break;   } }

I have a kiln that I need maintained at a certain temperature for an extended period of time (9 hours). Problem is  the kiln I got doesn't maintain its temp, it just constantly supplies heat until it would kill itself. Making me sit there for 9 hours turning it on and off exactly once a min. Obviously this is a problem... there is a physical on and off switch where maybe I can rig up some timer to hit it for me? Otherwise maybe there is a way to modify the wall outlet to supply power 1 min on, 1 min off? Any suggestions would help, thanks :D  http://www.clay-king.com/images/quickfriec.jpg

Im trying to get a switch to put between 4 wires to simple switch on/off I came up with this diagram i made up anyone know of it

By double state i meant for if you press  once job 1 will be done and if you press second time job2 will be done!

I am trying to build a small display box that has 2 LEDs (either 3mm or 5mm). One LED lights the displayed item from above, the other from below.  I plan to use only 1 LED at a time, so I presume I need an SPDT-Center off micro rocker switch.  I have a small model and it provides ample light with 2 CR2032 batteries, however, I'd like to be able to use an AC/DC adapter in place of the batteries. I need help figuring out what parts I need so I don't create anything dangerous. I am confused by the terminology used for the switch...how many amps/volts would I need? Am I correct that I would need a 6v adapter? Can the adapter be wired directly to a battery holder, or can it be SAFELY wired directly to the switch/LEDs? I want to order some stuff, but I don't know what I need! If anyone can provide this info, I would be grateful! Thank you.

Hey there tech heads, I'm planning a project that will involve LED's (battery powered or wall powered, haven't decided) in a lamp set up. There won't be a lot of led's, maybe 4-6. The real question is I want to put a touch switch in, like this one...http://www.buyhardwaresupplies.com/?t=5&m;=g1&itemNumber;=3007044Is there an alternative? maybe something that is smaller? Will I have to get a transformer and just run wall power to the leds? Lend me a hand, cause this will be a great instructable down the road.

Possibly one of the most annoying things in the gameing world.Could anything ever be done to stop people from doing it?

Hey guys, I know hardly anything about electronics so I'm hoping you can help. I have a switched marked 20A12V DC, it was originally for use in a car but I wonder if I can use it on a circuit that uses a 9V battery.

Lets say I want to switch on a circuit, that runs on one power source, with a different power source. I know this can be done easily with relays with the coil attached to one power source and the remaining pins to another power source. However, I want to know if something like this possible with electronic semiconductor based switches too. I am trying to make a USB based power outage detector for my computer that can help me in safely shutting down my computer automatically when I am not there to manually shut it down. A male-female USB extension cable of a very short length can be stripped and the red wire (+ve) can be split and connected to an electronically controlled switch which will remain closed as long as it receives current from an external power source say a wall adapter. As soon as the power fails, the switch is opened. A simple USB device like a flash-drive can then be connected to the female end of the cable and the male end of the cable to the computer. A simple C program will check at specific time intervals if the flash drive is accessible. As long as there is power, the program will be able to access the flash drive. As soon as there is a power failure, the program will no longer be able to access the flash drive and start the shut down process. Do have any suggestions?

Having trouble with an RF switch, getting low gain as it passes through the switch, I have x-ray the component, and all links are intact, no ESD damage that i can see, Does any one know what could be causing it to have low gain? possibly the RF track in the Switch? HEEELP?!?!!

5 4pdt switches using only center & 1 outside row of terminals (8 connections per switch). Power (9vdc) in to 2 terminals on center row each switch. When turn any one switch on, want other 4 disconnected from power.  Don't want anything programable. Relays ok or an ic. Trying to keep it basic & reasonable. Using total of 10 4pdt switches, half negative side & half positive voltage.  Set-up to work on either bank of switches.  More switches or 6pole  not an option because of expense.  I can come off 1 terminal with power to ?????   I feel like I'm missing something simple. I hope somebody reading Instructables has a solution. Thanks in advance for your help. 

Hi guys I am need of some advice and help if possible, I will try and explain as clear as I can. I have a lockup which I have modified to use locking bolts on a motor and I have a swipe card reader and pcb which when swiped it fires the output to power the motor (6v) which works perfect for 6 seconds of the locking bolts going in and out. I am looking for a way so when the locking bolts go to the locked position it hits some kind of limit switch and stops there (which I have done in the past) but then I want to be able to swipe my card to open the bolts and when it gets to he open position it hits another limit switch and stays open until I want to swipe and close the locking bolts. I don't want this to be timed I need this to stop on open and closed position but able to operate when either is pressed, Can this be done in anyway?

I want to attach my boiler to my alarm panel to an extra zone I have.  Problem is my alarm panel wants to see it NC until there's trouble and then wants to see it NO when it's tripped or in alarm.  My boiler alarms points are NO until the boiler goes into lock out and then it goes NC.  I would like to know if there is a way to add "something" so that i can monitor my boiler and know if it goes into alarm.  My boiler is a Weil Mcclain Ultra seris 3 with a U-control system if that helps.

Hi, I'd like to replace wired lights in our pizza car toppers, which run through windows into cig lighter, or run into hood and attach directly to battery -- with --- LED lights mounted in the car toppers, but wired so on and off switch is mounted on outside of car topper. This way there are no wire outside of the car topper, and drivers could just flip the switch on car topper itself to turn on and off.

I bought EL wire and the power is a push button switch and would like to know how i could change it to a toggle switch also if anyone knows how to change it from battery powered to powered by the car ild greatly appreciate it for that I was thinking of using a fuse tap though

I need a DPST rotary switch so that i can turn on two circuits at once but the closest i've been able to find with appropriate ratings is a DPDT switch, is it possible to wire it up to my circuits in such a way that it works like a DPST switch? I've attached an example diagram i found of a DPDT switch, if i was to disconnect the lamp from pin 1 and the buzzer from pin 2 would the first position of the switch become Off and the second position become On powering the LED and speaker? also assuming that the LED and speaker only connected back to their respective batteries and not to each other, could i attach a low voltage battery to pin 3 for the LED and a higher voltage battery to pin 4 for the speaker without causing damage?

0I have a remote controller for a portable heater, and working on a small project to be able to control the fan on/off from an arduino with Bluetooh HM-10 module. I thought a solenoid might work by mounting on top of the remote but it doesnt have enough force, I want to remove/desolder the mechanical button and figure out a way to control it without the switch but kind dont really know what circuit I should use, kind of just learning how to use arduino.Images of remote and button traces below.Any idea how I could wire this up to arduino via some switch/relay circuit? Any circuit design / schematic would be helpful(See pics attached)

I was thinking about making an intervalometer circuit for time lapse use on cameras. I was thinking of using this link https://www.instructables.com/id/Time-Lapse-Intervalometer-for-SLRs-with-555-timer-/ . I was thinking of adding a 22uf cap, as well as the normal 220uf cap, and then adding a 2200 uf cap, for a highly flexible range of time (ranging from a few seconds to about an hour), choosable by switch. I am starting to run into trouble at the camera connection itself. While i am fine with a cable, i would rather go with a wired remote, and using it to do the equivalent of pushing the remote buttons (instead of going through the cable itself). So i need a way to connect the two switch points electronically, rather than mechanically. Also is there a way to have it focus first, then take the photo? This circuit would also be good for cameras that do not have remote connectors, just go in to the camera and solder the switch points up, then hook them to this circuit. Would also work with a wireless remote. Hook it to the remotes switch and go from there. Just need a little help finding out what to do to get it to work the way i want to :) Thanks

What i try to accomplish is very simple. my Airconditioner has a Push button (momentary switch) to turn it off and on. but the Thermostat brings permanent power it it want the A/C to be on. i could make a simple delay setup for 1 sec. or so to trigger a relay but then i can't be sure its really on or of. how can i ensure its turned on via an timer relay safely if the control wire has power ? any recomentation on existing products or schematics ? i can check the "real status" via other parts on the airconditioner easy .. i just need a way to ensure ON and OFF based on the command line is High or Low ..  any ideas ? 

I have a simple question... If anyone here knows about the program LTSpice, is it possible to create switches that are manual, like pushbutton switches, spdt/dpst/etc., not automatic switches?

Hi All, I'm about to do a project that involves using Arduino to create an LED 'chase' effect. However I want the 'chase' to be triggered when someone removes an object from the switch. For example the lights would be on and running with a small rock (or similar) holding down a switch which then goes into the off position when the weight is removed. I can create a chase and I can operate the switch but I need help in writing the code that will combine these two features in to one event. Any suggestions, esp help with code will be warmly welcomed. Regards, Frank

Does any one know a switch that switches or toggles to another output after each one has had 1 turn  

I'm looking for the search term I need to find a "Rotary Switch" That spins very smooth and will keep spinning indefinitely like a volume control switch.

I have a spare light switch and I want to convert it to play a song when I flip the switch. How could I do that?

Howdy, I'm workin on a project with LEDs and I wanna know if there is a switch I can remotely activate?

I got a k and a slide switch and i dont know how to use it to connect the wires to it.

II have two switches. One momentary and one latching. Both have leds and want to wire them so that the LEDs turn on or off when the latching switch is activated. Please see pictures as they are not regular 2 or 3 poled switches. Thanks.

How can I make a wireless DPDT Switch for my robot. I'll be using a receiver and transmitter system but have no idea how to control the DPDT Switch using that.

 Is there or do I need to get complicated?