Search for VAC in Topics


Vdc to Vac

Hi there hope someone will have some info....anyway what I'm after is a schematic or similar for an inverter 13.8Vdc to 2000Vac with a variable square wave oscillator so i can adjust the frequency possibly incorporating a 555 will be @ 50% duty

Topic by Narnies    |  last reply


Rainbow vac for dremmeling?

Is this a good idea or no? I'm sure a few people on here know what a rainbow vac is, and it has the suction to work (although I try to use the low-speed mode if I can because it's a loud vacuum). I emptied it today however and there was metallic crap EVERYWHERE on the inside of the bowl. It wasn't that bad actually and washed out with water. But I was wondering, should I maybe use something like some dryer vent and make a plate to fit into my window?

Topic by Punkguyta    |  last reply


Roomba and Central Vac

I really don't like cleaning my house but I don't want to live in a garbage house.  I'd like to have a floor cleaning system.  For carpeted areas, I envision the that the system would use a Roomba and dock to a central vac system so that I wouldn't have to empty the Roomba.  For the non-carpeted areas, I'd like to use a Scooba that connects to water and sewer.  What are your thoughts?

Topic by sundet    |  last reply


Convert an old canister vac to a harness/backpack vac?

Greetings Instructables Brethren! I've been getting along with all hardwood and no vacuum cleaner for 7 years now, and now with kids, I am admitting defeat, but still can't take that dreaded step into the spiral of ever-shortening planned obsolescence cycles for ever-more-expensive and flimsy junk. I'm looking for a way to turn an old Electrolux or other simple, repairable, and reliable antique canister vac, into a backpack vac. I wanted to do this Instructable myself, but between the 3 kids and being only armed with a dustmop and broom, I haven't got the time to do all the project development! Can someone out there with a few tools and a Monster Hacker / steampunk mentality, convert an old canister vac to a trusty Ghostbuster-style Backpack Duster? It will need a superlong cord, though most of those oldies-but-goodies did come with that.  And if you do this successfully, and can see fit to sell it on the Instructables Store, you probably have your first customer, right here!

Topic by megmaine    |  last reply


How to make a mains power AC voltage meter for input as an MCU sensor?

Hi, I live off grid and need to keep an eye on various properties from various power sources. This includes, VDC 12-24 from the solar panels, VAC 220 from the fallback generator. VAC 220 from the inverter into the house. I can find off the shelf sensors for the AMPS which can feed into various MCUs I can find circuits to build sensors for AMPS, not a problem. What I cannot find is either off the shelf VOLTS level indicator sensors or circuits that do not involve plugging in walt-warts to bring the voltage down. Space is a premium so ideally I wanted to plug a live and neutral wire into one end of a pcb and have hopefully an analog 0-5 VDC representation coming out of the other. I have in my box some small 6, 9 and 12 unregulated mains VAC transformers. I find it strange that I can buy from China a small LCD with Volts, Amps, Watts and Hertz for about 8€ but not a barebones system which is what I need. So if anyone knows how to either hack one of these Chinese meters to give MCU usable input data or can help me build a meter, I would be very grateful. My son-in-law is an electrician but electronics is alien to him. So he can oversee the safety on big stuff. Thanks and kind regards, jB

Question by britesc    |  last reply


How strong are typical shop vacuums?

As in, how many mmHG would it be able to sustain consistently if there are no losses from the hose. I want to know since I want to substitute an expensive lab grade pump with something I already have if it can do the same job. I primarily intend to use it to filter water from an iron oxide powder (I want the oxide so I can try my hand at making some thermite).

Question by The Ideanator    |  last reply


how 150-300VAC 50-60Hz 0.15A adapter work on 110~120VDC?

In India local trains are using DC to power up lights and fans inside the bogies.sum bogeys have power socket to charge mobile or laptops.but that socket is powered by  110~120VDC .is that possible. AC adapters can work DC

Question by vina1991    |  last reply



whats the easiest way to convert 120 VAC from wall to 24 VAC ?

A friend gave me a security camera without power wires. on the back it  has 3 power terminals  - 24 VAC - GND ( ground) - 24 VAC  should i just try to find a wall adapter that puts out 24 volts DC and then take it apart and take out the rectifier ?     im guessing thats how they work.   THANKS :)

Question by blackghost    |  last reply


FoodSaver Vac 500 pump parts?

I took apart my slowly sucking Vac 500 and discovered the plastic ring around the piston on the pump is broken and I'd like to replace the part.  Any leads?

Question by accelv    |  last reply


How to step down and convert wall outlet to 24 VDC?

Hi I am working on a project and i need to convert 120 VAC from a wall outlet to 24 VDC to run my device. I was wondering if anyone has a suggestion if i should first transform the 120 VAC to 24 VAC and then convert the 24 VAC to 24 VDC? or if there is a 120 VAC to 24 VDC with a normal wall plug for sale. 

Topic by mkapler13    |  last reply


1.5vdc to 200vdc without camera circuits?

I need to charge my rail gun , i always short out the transformer on camera circuits so im done with them , Ive seen "voltage triplers" around and was wondering if that would work if the input is dc? Also does anyone have any other idea, i don't wanna kill myself and use 120vac so that's out of the question.

Question by tom10122    |  last reply


Using AC to operate a automotive 12 VDC relay

My question is:  can a typical 12 vdc automotive relay be operated (voltage across terminals 85-86)? I am building a car from a riding lawn mower for our grandson.  I want to operate lights from the 12 VDC circuit but I need a signal voltage to actuate the relay across relay terminals 85-86.  I would like to use the existing AC powered light(s) voltage for this purpose?  Possible?

Topic by mndb1971    |  last reply




How do I rewind 220 volt transformers and motors for 110 VAC?

I have some devices from overseas that are 220 vac and would like to rewind them for use with 110 vac. In the Philippines, where we were they repair, rewind and recycle nearly everything.

Question    |  last reply



220 VAC to 12 VDC with minimum no-load wastage? Answered

Hi,I want to convert 220 VAC to 12 VDC without using a transformer since they consume power even when a load isn't connected to the secondary output.So this is how its to be-A 12 volt dc supply should be available,which will be fed to a relay once a switch is set 'ON'.I could easily depend on a transformer but this 12 VDC supply is to be available always and can't afford the wastage.pls suggest an alternative(and FYI a battery is not applicable in this situation).

Question by Adarsh_tronix    |  last reply


Will a cyclone dust separator improve the performance of my central vac?

Before I replace the central vac "unit" I need to check a few things - like air leaks, blockages etc..I remembered seeing a cyclone dust separator hwo-to on Instructables and because, when it comes to physics,I am a complete idiot, I wonderd whether building such a thing as an adjunct to my central vac unit will improveperformance in any way.Thanks,AMS

Question by zombateen    |  last reply


my machine seems to vaccuum properly but will not shift when finished. what could be the problem.?

The machines are not finishing . I have a vac 300 and a vac 370 both seem to vaccuum but do not shift at the finish. Do you have any suggestions.

Question by fzysw200    |  last reply


request, 12vcd (automotive) to 12 vac power supply

Why?  So I can run a pile of 'pro' audio equipment on a parade float without resorting to a generator or an off the shelf 120vac (barely) inverter. The equipment I'm talking about is a pair of 4 channel wireless mike receivers (8 mikes total) and a 10 channel mixer.  Other input comes from an MP3 player or CD player.  We also have an AM/FM/HD radio on board for those long waits in parade linup.  The power amp is an automotive (12vdc) unit, 4 x 1000 watts.  Main power is a pair of deep-cycle NAPA (optima clone) spiral cell batteries topped-off from the tow vehicle via a charge isolator.  There is also an 35watt solar panel (again, for those long lineups) run through the charge isolator.  The solar panel maintains the batteries while the float is parked or in storage. Cracking open the gear we have, every single one of them uses a 10:1 step down transformer to drop 120 vac line to 12vac before dumping it into the mainboard. It looks like 12vac @ 3 amps will do it for the wireless mike receivers and mixer, but why not shoot for 5 amps to be safe? Ideally, there would be some serious filtering and regulation/protection on the output. In a Perfect & Ideal world, there would be multiple 12vac outputs each capable of 2 or 3 amps and isolated from each other. Too much for a request?  You never know if you don't ask. And, in advance, many thanks!  

Topic by snoeclipse    |  last reply


Frequency of 12v halogen transfomer?

Hello everyone.. I would try using a 12v transformer halogen (please see photo) for flyback driver (about 10-30 watts) .But seller sell on Ebay do not know the frequency of 12 vac, so could you help me to know that(frequency of 12 vac out) thank you in advance.

Question by lam    |  last reply


How to use a 110 VDC motor plugged into my 110 VAC garage outlets? Answered

I need a bigger motor for my micro lathe project and got one off ebay. its the same motor as on my 7x10 mini lathe but I just realized the motor is 110 VDC and I need it to be 110 VAC. so I can just plug it in to the wall outlet... how do I make it so I can just plug it in and go? Is there some type of wiring trick or some adapter I can use? Thanks!

Question by zacker    |  last reply



Can LEDs be wired up to replace 12 VAC garden light bulbs?

How do I put them together? Some are wedge base and others are bi-pins. Can they be made water proof? Because they use less energy, can I string more of them using the same 300w transformer?

Question by yopauly    |  last reply


i need to use my 60w 127 vac sodering iron in my car as in 12 vdc so i need a cheap easy to make inverter any ideas?

Later i would also like a inverter that could handle a 950W 127VAC angle grinder also cheap and easy (ish) to make

Question by cassiorichiniti    |  last reply


Triac Answered

In the circuit shown are we actually only switching one side of the 220 Vac? From L to L is only one leg of the 220?

Question by WWC    |  last reply


Help picking DC on/off switches

I'm in the process of trying to build a battery powered trailer mounted speaker system and i've got nearly all the parts now except for power switches. I didn't think i'd have a problem with choosing some but after searching around the vast majority of switches seem to be rated for AC or 12 or 24VDC and the absolute highest DC rating i've found so far is 28V, the problem is that the highest voltage i'm using is a little under 36VDC so where do i find appropriate switches? I've been getting helpful advice about the speaker project from someone on a forum called SpeakerPlans but they seem to think that i'd be fine using an on/off switch rated at 5A 12VDC despite the higher voltage requirements of my amplifier, i'm not very electronics literate but this doesn't make sense to me and i'm a bit worried about pushing too high a voltage through the switch and perhaps causing a fire or something. I would prefer a rotary switch if possible as i used one on my old 12V speaker and i found that it's a lot less likely to catch on clothes and bodies and break or accidentally turn on while the speaker is being manhandled/transported about. I have 2 circuits in my speaker setup, one is the 36V circuit powering the amplifier/speaker and the other is a 12V circuit powering a small mixer to boost the gain and tweak the sound, assuming i can find a switch capable of handling the 36V is it possible to have one switch that could be wired up to turn on both circuits at the same time?

Topic by ambientvoid    |  last reply


How to create 120 VAC to 90 VDC Power Supply?

I need to create a 90 Volt DC Power Supply using a capacity, toroid and bridge rectifier. I know that with a toroid you have a primary (input) voltage and then you'll conserve power but have a different secondary (output) voltage. I know that if you put say 120 VAC in the primary, the outputs might be, for example, 50 Volts out, which are also AC. I want the voltage to be DC, so I know that I need a bridge rectifier that will boost the voltage by 1.41 because of the AC to DC conversion. However, you also need a big fat capacitor, and I have no idea how to size and select this. Help?

Question by Matt Adams    |  last reply


Automatic Power Switch

I am looking for someone who is McGuyver-like and able to show me how to build an outlet that allows me to plug in a power tool like say a miter saw and a shop vac. When the outlet senses a power draw from the saw, it`ll power the vacuum to start as well then when the miter is stopped so will the shop vac. I know Craftsman makes this very switch ( http://www.sears.com/shc/s/p_10153_12605_00924031000P?keyword=auto+switch ) however since it cannot be brought in to Canada, any makers out there?

Topic by Kokopelli2009    |  last reply


Where to find vintage electronic hardware

Im trying to find a online source of vintage electronic gear. Things like old vac tubes, analog voltage indicators, and switches.

Topic by kennyboy019    |  last reply


vaccum forming?

How big of shop vac i need ? i had i lil one it only sucked at 3 it formed but not all the way im doing slot car boddies do i need a bigger one ?

Question by cameron181    |  last reply


LED challenge: How to build an LED circuit that feeds off of a Lionel train track (2-18 VAC) at a reasonable price.?

 I am working on a shelf-train that will circle my son's room. I want to add lights to the boxcars using LED, which means the power would come from the tracks. That means AC power, variable from 0 to 18 VAC, with 5-6VAC the average use power. What is the best way to do it? Should the power be rectified? And how do you deal with the variable power source?  I also plan to control the transformer with an arduino. Bonus points for any advice there! Thanks

Question by dmeierhofer    |  last reply


Remove Juice Stain, Carpet

Something Red. Still fresh.  I have damp towels on it now. I have a shop vac. Ive read about mixing peroxide with soap. What soap, specifically? Other tips?

Topic by Toga_Dan    |  last reply


Dyson vacuum parts

Our Dyson vacuum finally broke after 10 yrs but the motor still works well. I've been thinking of using the motor and canister as the base for a shop vac. Has anyone had any experience working with Dyson parts? Any suggestions would be great. Thanks.

Topic by sage729    |  last reply


Small motor overheat

On HVAC evap fan motor at 120 Vac no load motor overheat then feedback pulse stop working 5178 pulses / min divided by 4 = 1294.5 rpm shall turn at 1350 + - 20 rpm what make the motor to overheat ? the unit had a power surge when lightning can it be saved ?

Question by jma123    |  last reply


120 volt LED traffic signal light made to run on 12VAC ?

Is there any way to take a 120 volt LED traffic signal bulb apart and convert it to work on 12 VAC we are using this around a lake and don't want the chance of electrocuting someone

Question by dbug10    |  last reply


What would you do with 2 very large toroidal transformers? Answered

I found a few of these http://www.alliedelec.com/search/productdetail.aspx?sku=70181130   while salvaging pelican cases. They're really expensive, so I imagine they must be useful for something. Any ideas? Brand/Series :  182 Series Configuration :  Toroidal Current, Secondary :  10/5 A Dimensions :  2.27"H×5.06"O.D Frequency :  50/60 Hz Length, Lead :  8 " Mounting Type :  Panel/Chassis Number of Outlets :  2 Phase :  1 Power, Rating :  300 VA Primary Type :  Dual Standards :  UL, CSA, CE Termination :  Leadwires Type :  Power Voltage, Primary :  117/234 VAC Voltage, Secondary :  30/60 VAC Weight :  5.58 lbs.

Question by Nate Cougill    |  last reply


Running LEDs?

Quick question, really. Anyone know if it's possible to run LEDs in series straight off of wall current?  For instance, lets say I have 60 2v LEDs connected in series. Could I just put 120 VAC into them (with the proper resistor of course) and they'd light up with no problem?

Question by tylervitale    |  last reply


I have a rope light on an exterior staircase.w a 120 VAC timer. Lights stay on all night. Need motion & lite sensor. Answered

The lights need only come on at night and when motion is detected. Sensors need to be at the top & bottom of staircase. They need to stay on for as long as it takes a Senior Citizen to climb 15 stairs.

Question by velcro2    |  last reply


FoodSaver Quick Start V825/V845/Game Saver Sport Vacuum Sealer.

We have an FoodDSaver QuickStart V825/845 Game Saver Sport vacuum sealer that will suck the air out but will not seal. I was wondering if it could be the heating element gone bad???? Tell me how to check it and how to fix it. Thanks in advance. My email is; fed1@farmerstel.com.

Topic by DilmosJ    |  last reply


5HP motor, what to do with it?

I got a 5HP motor from a shop vac and don't know what to do with it. I wanted to make a go kart, but it was too inefficient and would take too much power. It still is connected to the switch and the outlet cord. I want to make something cool out of it.

Topic by RyanJ1    |  last reply


Can I make a solar power source with a car battery, 5 watt 12v solar cell, and 12 volt to 110 vac 400 watt inverter? Answered

The title sort of says it all but what I am wondering is  if the solar cell can keep up to the inverter...

Question by Super_Nerd    |  last reply


LOW COST HIGH VOLTAGE ELECTRONICS AVAILABLE FOR $3 US SHORT TIME

There are soo many who ask for High Voltage generation. Here is a good deal for as long as the stock is available. http://www.mpja.com/email/11-01-11.asp?r=214011&s;=14 A 5 VDC  input  and 400 VAC output for $3.  .  .  .  .  .    A

Topic by iceng    |  last reply


How do I convert an AC device to run on a battery pack?

I have a device that runs on ac (110-120 Vac - 180w). I want to make it portable so that it can run off a battery pack such as AA or 9 Volt or even a custom battery. Is this too much of a power requirement to make it possible??? thanks in advance for your help.

Topic by gadgetcrazy    |  last reply


Need help wiring up this digital thermometer

I bought a thermometer and probe from McMaster-Carr, but didn't expect that it'd come without a power plug nor a clear way to wire it to the probe. Instead, there are a few connections at the back and I need a hand to make sure I don't break anything. Can anyone here help me identify the right way to wire this for 110v wall power? Do I put one end of the power cord into the 0 VAC socket, and the other into the 115 VAC? Also, the probe terminates in eyelets, where this wants a raw wire for the connection. I can snip them--is that right? And why are the probe wires red and yellow (the unit has inputs for TC+ and TC-). I've attached a photo of the rear of the unit. Thanks for your help everyone. EDIT: I did some research and figured out that my hunch was correct. One connection to 0VAC, the other to 115VAC, and the probe leads into the other side. Works great, too.

Topic by mikejs    |  last reply


Advice for building a blower

I need build a blower that will shoot potato chips up in the air from underneath a table. I need to create a shower of chips for a video and it needs to burst continuously from a 4-6 inch hole in a table. I was thinking of using a shop vac and reverse the hose.  But what would the best way to feed the chips in? I would appreciate any advice if you have done something like this. Mel

Topic by mazelady    |  last reply


can a gas snowblower be converted to an electric motor?

I have an ancient snowblower with a clapped out Tecumseh engine that burns oil faster than gasoline.  Has anyone done a conversion to an electric motor, and is it feasible ie cost of electricity?  Would I need a 220 VAC outlet or could a 110 motor handle the load?  I live in Alberta, and we get a metric butt load of snow.  Thoughts?

Question by kat_man_2    |  last reply


How is the piston on an old manual vac. pump repacked using leather sealant(packing) for which it was designed?

I have several antique manual piston vacuum pumps all of which need the pistons "repacked" with leather gaskets. The leather sealing gasket is specific for this type of antique pump and allows the lubricated piston and leather sealant to provide an airtight seal between the piston and the internal cylinder walls into which it inserts. The piston rod is pushed inward by way of handle which is attached to the piston rod in the cylinder. On manually pulling the handle or lever outward, and thus the piston, air is evacuated from a bell jar via tubing and a valve, the bell jar resting on a round metal plate or stage (sealed with vacuum grease) to which the tubung communicates and subsequently communicates with the pump. Upon pushing the pump lever inward (and thus the piston), air pulled into the pump cylinder on the evacuation stroke is vented to the exterior by means of a one way communication between the fore side of the piston and the aft side of the piston and to the atmosphere by way of a hole in the closed end of the piston cylinder. The cycle is repeated as necessary. Does anyone know how to repack the pistons with the required leather seals, or have a source for the leather seals, or know of a craftsman who knows how to accomplish repacking of these historical pumps (antique scientific instruments). Thank you for your attention to this matter.

Question by pm7289    |  last reply


How to lower the DC voltage of a transformer. Answered

Hi, at last i have got a 45-0-45 transformer @5amps, but now i have a problem, the VDC output i am getting is 74vdc but my 400watt rms mono amp's maximum input VDC is 56vdc, so i don't think its a good idea to feed the 74vdc, so is there a way to lower the 74vdc, BTW please don't advice me to unwind the secondary coil because i am new to electronics and the transformer didn't come cheap, so i don't want to break it. i am using IN4007 diode and 4700uF 63V cap for the bridge rectifier. ​I just forgot to give some details on this topic. The transformer is to use with the 400watt rms mono amp. The amp has 8 MOSFETS side by side, 4 IRFP9240 and 4 IRFP240 and 6 transistors. https://s23.postimg.org/l8onxw1wb/image.jpg https://s17.postimg.org/czg1ynam7/image.jpg BTW the transformer shows 45-0-45 VAC but when i test with a multimeter, the VAC is 53volts. Thank you. Regards.

Question by Lima79    |  last reply