Low Gain in RF filter after the signal goes through the switch 2-18GHZ

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?!?!!

Posted by SamuelG122 1 year ago

Switch problem

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

Posted by number8wire 6 years ago

Touch Switches< Need electrical Help!

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.

Posted by PathogenLabs 10 years ago

LED powering and switches

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.

Posted by craigo 6 years ago

LED Pizza Delivery Car Toppers

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.

Posted by tfurmato 4 years ago

6volt powering locking bolts but need diagram to wire limit switches

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?

Posted by sherpin2000 6 years ago

Momentary switches

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

Posted by Nanow 6 years ago

Arduino on off switch for LEDS

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

Posted by frankhiggins 7 years ago

residential electric info needed

I have 4 rooms and each have a light fixture and a switch controlling each of the lights.   .  The power source from the electrical panel is entering the 1st light fixture and then to each of the other light fixtures.  I am using 12/2 with a ground Romex wire.  There are only 3 wires in the Romex.  One is white, one is black, and one is bare.  Please tell me which wires connect to each other in the octagon boxes in the ceiling where the light fixtures are and which wires connect in the respective switch box.  Please use wire colors(white, black, bare)when explaining the wires that will connect.  No need to explain the "bare wire" connections because I will connect all of them together back to the panel and from there to ground.  Thanks for your help!  Louisiana bayou backdoor

Posted by themanpan68 2 years ago

HOW TO: change USB plugs for 5 volts Jacks switch-Inputs (pics)

We have a several pair of carbon fibers pads, but what happens now all of them have a USB plugs that don;t fit with the receptive Jack Plug in 5 Volts Battery This batteries with the pads work to heat blanquet. We need help, or more than this a teacher! who tell us how to take out these USB plugs, how to join their cbables, and the how to add a plug in 5 Volts Jack. If is not clear please let me know Maria

Posted by Maria SoledadD 1 year ago

Toggles, LEDs, and Ultimate Frisbee

So here is my challenge. I play an ultimate frisbee pickup game every week (Tuesday at the Harvard commons in Cambridge, MA, at 7PM stop by and play!). We have a great LED frisbee that extends the games into the night, but once it gets really dark telling teams apart becomes challenging. I hit upon the idea of making LED 'throwies' for one's body. Take a little 3v watch battery, tape the leads of the LED on with some electrical tape, and then use a safety pin clip it onto to clothing, and blamo!, you have an LED pin that makes playing ultimate frisbee in the dark surprisingly easy, fun, and colorful. There are some problems with this. First, it takes a little time to wire up the LEDs. It is a fun group activity to start with, but this is a pickup game so people wander in all of the time to play, and each time this happens someone has to run off to make some more LED pins. It would be awesome if I just had a bag of them ready to go. Second, I have to pull the pins apart after each game. Third, my red and yellow LEDs (blue and green are fine) really need a resistor as they tend to go dull. Finally, I would really like to make these guys a little more robust by fixing the leads on more solidly. So, with that said, here are some things I could use some ideas on. 1) Cheap toggles. I needs them. I would be willing to toss a few more dollars at these pins if I didn't have to tear them apart each time. Toggle switches would mean I wouldn't have to tear out the battery each time. I am having a really hard time finding cheap small toggles on the inter-tubes. Does anyone know of some good places to look? There is also the added challenge of finding a way to attach the toggle in a mildly robust manner. 2) I am looking to rig these pins up into something a little more sturdy. I was pondering soldering the LEDs to the 3v coin batteries I am using and then super gluing the solder. Is this workable, or should I just break down and buy some battery holders? If battery holders are the answer, again, does anyone know of a cheap place to look? Finally, does anyone have any other interesting suggestions? I am willing to drop a little money into the project, but I really don't want to be spending 5 dollars per pin. In my ideal world my final product would look like an LED, a battery, and switch mounted on a safety pin in such a manner that if someone sticks it to their shirt and rolls into the ground it doesn't break. Getting all of those things to come together in an even vaguely cost effective manner is proving to be a bit of a challenge. Any ideas would be great!

Posted by JonnyProton 9 years ago

Momentary switches used in mice

I'm going to make a custom guitar hero controller for myself, and i want to mod the buttons so that they don't requite so much travel, and they're more.. snappy, if you get what I'm saying. The switches in mice are perfect, but I don't have enough mice to dissect to get enough buttons. I also found that some of the switches are DPDT, which are perfect for throwing in some LEDs... Anyways, my question is where can I get some DPDT switches from mice, without bulk ordering on ebay? And are there specific names for those switches?

Posted by cvxdes 10 years ago

USB to switch?

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?

Posted by Exploitation 5 years ago

USB Light 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?

Posted by wisconsinrules88 4 years ago

Need help with switches.

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.

Posted by bastafari 5 years ago

k and a slide switch

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

Posted by southautomatic 10 years ago

led 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?

Posted by tic tac man 8 years ago

help needed to wire a series of toggle switches

Can anybody please show me how to wire a series of 7 toggle switches. The switches are 3 amp 2 or 3 pole, a diagram would be very helpfull with an explanation. Or a video

Posted by Woodycrafts 9 years ago


I have a triple switch which connects fan and 2 lights. I want to install a remote control switch (picture attached) and make the process remote as well as switch. How can i do this? 

Posted by SafarM 2 years ago

USB cable with On/off Switch

Anyone know how to make USB cable with On/off Switch, not just to off the power, but to completely switch off the data flowing on a usb cable.  Thanks!

Posted by dimension_55 8 years ago

Cat5 Changeover Switch?

Is there anyway to make a switch that switches between cat5 connections? For example, if I have 5 wires running to a rack with some switches in it, and wire one goes bad, I want to be able to turn the switch and then it will start using wire number two instead. How would I go about doing this? Any help would be appreciated :) -Tyler

Posted by tyler9613 8 years ago

Question about switches...

I am very new to electrical projects. Please be nice. Does it matter which side is positive or negative on a switch?

Posted by Soileau 10 years ago

switch help

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?

Posted by guyfrom7up 10 years ago

Help with antique three way switch

I have a 60's era Stiffel table lamp that has a bad rotary switch. It's a three-way switch with an unusual design. I cannot find a replacement. Is it possible to salvage this switch in some way? Any help is appreciated. Tom

Posted by ttemple2 1 year ago

Replace 3-way light swtichs

  Hi Folks,   I have a small laundry room with two 3-way light switches and no outlets. I would like to replace both switches using one of these options: Replace "master" switch with combo switch/outlet (like Pass & Seymour TM838. Replace slave switch with an Occupancy Sensor Switch. -OR- Same has above but use a regular outlet instead of combo. If I have to I would be happy with disabling one of the switches and just have the Occupancy switch. I have posted photos of the wires coming out of the switches here: http://stellabotte.smugmug.com/Other-1/Electric/37036170_Zc4KSw/#!i=3075021321&k;=gGJ9vgJ The replacement switches are: Pass & Seymour TM838-WCC   Combination Sw/Outlet    Pass & Seymour RW3U600       Multi-Way Occupancy Switch   One side bar question, can any 3-way switch work with any other 3-way switch on the same circuit ? Thanks -Fred

Posted by fstellab 4 years ago

Air Switch Dimmer

I would like to make a switch like the one in mathmos Air Switch. i am not sure how to but could this be done. or is there some thing close that i can do? need it for a school project. thanks pyr0000

Posted by pyr0000 10 years ago

How is that switch called in english?

Hello everyone, for my instructable I need to know how that switch is called in english. Thank you for helping! Mischka

Posted by mischka 5 years ago

I need a AC/USB adapter controlled by IR Switch

I need a AC/USB adapter controlled by IR switch

Posted by mrkleing 8 years ago

how to add a little on/off switch to this meter?

Hi, quick question, how do i connect a little toggle switch to this meter? what/where do i connect the switch to? i want to set it up to override the push button. Thanks

Posted by HTF 10 years ago

Where can I find cheap key switches?

I need a momentary key switch, like the ones in car ignition switches for an upcoming project. I also need one that toggles. Like these, but from a cheaper source.http://www.amazon.com/Key-Switch-with-2-Keys/dp/B0002BA3PE/ref=pd_sim_e_3http://www.amazon.com/Momentary-Key-Switch-2-Keys/dp/B0002ZPBHK/ref=pd_bxgy_e_text_b

Posted by Gamernotnerd 9 years ago

Switch Timer

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

Posted by Don Amada 4 years ago

12v device to switch on a 9v device (signal to switch on only)

I have a device that is switched on by a sensor, powered by 12v, 1.3amp battery. I have another device that is switched on by a mechanical push button switch, this is powered by a 9v battery. I want to piggy back on the wires that switch on the 12v device and take the signal (to turn on only) to the device that is already powered by a 9v battery and normally turned on by a push button switch. ( I want to replace this mechanical push button switch with an "electronic switch" turned on and off the the presence and absence of the 12v signal) I want the 9v device to switch on only when the 12v device switches on and switch off when the 12v device switches off. Also I want the 9v device to only run on the original 9v battery (not accepting power from the 12v device and not returning any power from the 9v device to the 12v device. Is there a switch device/relay that can do this? A device that I can just connect between the wires going from the 12v device to the 9v device? I am a novice to electronics please be kind. I an open to using part from another device, and basic mods. Thank you

Posted by Jvos 6 years ago

Help wiring dpdt rocker switch (on-off-on)

Hi I want to install a on-off-on waterproof dpdt rocker switch into my radio controlled boat. I want to run the motor and a set of led navigation lights with on side of the switch and the motor with no navigation lights on the other side. Is this possible and if so how would I wire the switch. Many Thanks

Posted by neill125 7 years ago


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

Posted by eddcole 10 years ago

Using a recycled switch -- Question about voltage

I'm building a simple solder fume extractor using a 12v fan from an old appliance. I will wire in a 12v power supply. The switch I want to use is rated 125v AC at 13 amps. Is there any reason I couldn't use this switch? Or do I need to match the switch's voltage with the fan's?

Posted by Boy Genius 6 years ago

External switch box that attches via master internal HD cables to switch between master HD's

I have an idea, spawned from my resent switch to linux and the fear of still needing XP at times. anyone have any ideas on how to make 2 seperate hard drives (don't want partitions and crap I want 2 seperate HD's) to attach externally and be able to switch betwen them just by hitting a switch or something?

Posted by chaoscampbell 10 years ago

Building a switch to invert current

I got a small electrical engine the other day, and I have to hook it up to two switches so that one switch starts the engine clockwise and the other counter-clockwise. My initial thought was to simply hook it up to two separate batteries each with a switch and one with the current reverted (like illustrated). But I'm wondering if there's a better way to go about this. For instance I have no idea if accidently activating both switches simultaneously will blow up the engine :s

Posted by Flark 9 years ago

connect to a mini switch to LED

I hooked up a 5 mm LED to a mini push button on-off switch. However, when it is in the off position the color is still bleeding through. Could this be because the LED is too strong for the switch? I am powering it with a CR2032 coin cell battery. 

Posted by cpaz17 5 years ago

Headphone-Speaker switch

This goes with my last post on putting an Ipod in an old CD player case. I now have an idea to have a switch to change the sound output between headphones and powerd speakers. Again I tried to research how to wire a switch and this is what i came up with.

Posted by fresh1 8 years ago

Connect multiple Reed Switches to one Raspberry pi

Hi, I was wondering if its possible to connect multiple reed switches to 1 Raspberry Pi so i can get notified whenever 1 or more switches gets triggerd. thank you.

Posted by archi0112 1 year ago

infrared switch

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.

Posted by Jordo 10 years ago

Using computer as an electronic switch?

Please help. I really appreciate it.

Posted by babak.mn 10 years ago

wiring a dpdt switch like a dpst switch

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?

Posted by ambientvoid 1 year ago

2-Switch Flashlight

If nobody has seen yet, my Easy LED Flashlight. I was wondering how I would make a double switch and double light on the flashlight. Do I have to add hookup wire to the one switch and connect it to the other switch and then have more hookup wire going to my other LED? -Thanks in advance -Brennn10

Posted by Brennn10 11 years ago

Electronics Question: Double Switch

I figure that this is a simple question, but I have a pretty limited knowledge of electronics. Would it be possible to hook two switches up (in parallel) to an LED, so that if either switch was toggled, the light would go on? I'm almost definitely sure it would, but just wanted to make sure. Thanks!

Posted by Bran 10 years ago

Ethernet selector between 4 different sources

Hello, I'm trying to design a switch box to switch between 4 different ethernet sources and output to one cable. I've checked around and believe I have developed a way to do it, but I am unable to find a switch that uses 4 smaller independent switches. The concept seems pretty straight forward but I don't want to use 16 switches. Please let me know if there is a switch which controls 4 independent connections or if there is a better way that I'm over looking. I look forward to your input! Best Regards, Zach G

Posted by lossofworth 4 years ago

custom dead-man switch with buzzer

So I am in need of something handheld with a "dead-man switch" that activates a buzzer or some type of alert if you let go. The buzzer would be silent as long as you hold the switch and go off when you release it. Probably build the whole thing into a small piece of PCV so its hand held. I don't know where to start with the "dead-man switch", any suggestions? 

Posted by jtichinel1 4 years ago


Im building a multiphase coilgun but encountered a problem. In order to activate secondary phases i need a photoelecric switch. In my case it is TCRT5000 photoelectric switch. The problem, however, is that once the ''beam of light'' is shining on it, the switch is turned on, but i need it to be turned off when ''beam'' is directed at the diode and turn on when the ''beam'' is not directed at the diode. How do I do this? And in this case changing polarities wont change anything.

Posted by mondeluz 2 years ago

Motion Sensitive Switch

I'm trying to come up with a switch that activates when it is moved. Ultimately it would connected to a sound device and a small sample would be played every time the unit is picked up. Any suggestions on how I should go about doing this?

Posted by hectma 10 years ago

Book light switch?

Hi. I have a shelf, directly attached to the wall with a light switch at the back (see attached diagram). I'd like to use a tilting-out book as an on/off switch a la cliche mystery secret-room-door-opener. Any ideas for how to do this? Oh...just found this example: http://www.vespoe.com/blightdesign/shop/secret-passageway-switch Thanks!

Posted by samhandwich 6 years ago