Volts and current ? Answered

I'm confused what's the difference between voltage and current ? also what's the difference if I power a 1.5v motor with 3 1.5 battery's in parallel and same motor in 3 1.5 battery's in series

Asked by Robinson ruiz 9 years ago  |  last reply 9 years ago


Amps and Volts? Answered

So i have a atx pc power supply and i am going to use a pci cable to draw power from it for a led lighting system and the led light system can only take up to 12 v at 2 a, will that destroy the led light system or will it be fine? (also i cant open up the box that controls the light system to fix the blown fuse)

Asked by Austinthemighty 4 years ago  |  last reply 4 years ago


24 Volt AC volt to 12 volt dc?

Hi guys i have a 24volt ac motor and want to reduce it to 12v dc. I have worked out how to change it to dc but not how to reduce the voltage. Is this easy to do or do i need to purchase something from the electronics store. any advice would be appreciated sam301

Asked by sam301 6 years ago  |  last reply 6 years ago


converting 9 volts to 6 volts? Answered

I have a small r/c tank that is 6 volts  .the problem with it is it is made to take CR123A 3 volt camera batteries  .which run about 5-7 dollars each  .i could by rechargeable ones for 50 but i thought it would be easier and more cost effective to convert it to run on a nine volt rather then four AA or AAA  .not just do to the cost but also because the space limitations i know how to solder and built circuits if i have a schematic provided .so could anyone provide me with a small circuit schematic or is it just in need or putting a resistor in between the terminals?

Asked by somebullcrap 9 years ago  |  last reply 3 years ago


3 volt signal to trigger 7 volt? Answered

Ok,so I get a 3 volt signal from a detector and use this 3 volt to trigger an alarm which atleast need a decent 7 volts to function.The detector could take a max. of 5 volts input which I got from the 7 volts DC supply.This 5 volts fed,gets transformed into 3 volts after the detection.So let me make this clear,I have a 3 volt and a 7 volt supply.I need to use this 3 volt to trigger the 7 volt circuit.I know what you are thinking-a relay !right?but I couldn't get  a 3 volt relay anywhere(though I got a 5 volt relay).I can tackle this situation in two ways.1)Either by stepping this 3 volt to 5 volts and making the relay do the job.but how? 2)Or some circuit to use this 3 volt to trigger the 7 volts(like a relay but maybe by using ic's).This is the final part of my project and so please help me.

Asked by Adarsh_tronix 6 years ago  |  last reply 6 years ago


Gameboy Volt / Speed ?

Hi, I am working on a little project with my olde Gameboy Color ! I am taking it out of its case, and building a wooden / bronze one in SteamPunk Style. Now to get even Nerdier i am considering to build a "Stirling engine" and power the little machine with a Dynamo attached to it! However this might turn out, i would like to know if the dynamo generates more than 3V if that would speed the Gameboy up, or simply fry it? I will add a Good Resistor to prevent that btw :p

Posted by Schoening 6 years ago  |  last reply 6 years ago


5 volts ballast

Can I have the circuit for the 5 volts cfl lamp ballast. Please! Thanks.

Posted by remyjovero 5 years ago  |  last reply 5 years ago


6-Volt Lamp

I have this 6-volt Lamp it's kind like what you would find in one those 6-volt flash lights except that this is like a stand alone lamp and it has two wires that come out of it but only seems to work at 6-volts, so I have a large 6-volt battery and a 7.5 volt output power adapter I was wondering if 7.5 volts would be too much power to use to power the lamp I don't want to blow it up. I don't know if it'll even work at 7.5 volts because I tried a 9-volt battery and it won't power on with it.  The image is the same lamp I have except mine is connected to a base and has two wires that come out the bottom I would like to find another way to power it besides using a large 6-volt Battery.  Any Suggestions.

Posted by Graydant 4 years ago  |  last reply 4 years ago


12 volt leds

I work at a custom motorcycle shop and use led lights in our fenders. I'm having trouble finding a constant supplier of 1,2,3, sequenced led lights for run light,turn,and brake. Any one can help that would be awesome!

Posted by cbarr600 5 years ago  |  last reply 5 years ago


16 volts and a LM7805? Answered

I was wondering I'm making a very tiny project with that requires 5v. I'm using these little 3v batteries (CR2016). If I use like 6 of those and a 5v regulator, approximately how fast will they drain? Is that not a good way to lower the voltage? 

Asked by HavocRC 5 years ago  |  last reply 5 years ago


1.5 volt LED?

well im putting an LED to my coilgun so it would turn on when  the gun was on (lol) and i was thinking about putting it "between" the 1.5v battery and the charging circuit BUT! i found out that the f*cking LED is a 3v, I tried with all of the LEDs I have but I think non of them works with 1.5 volts does the 1.5 volt LED actually exist? (LOL) or, in the case that I do not find any LED like that one, how could I use the 3v one so it could turn on with 1.5v?? maybe the drawing can help... help pls thnks **the circuit has a red led that lights up when the capacitors are charged, this one is just something i thought it would be nice to have to have it and tell you when its on** **ALSO** this is just a part of the entire circuit, its not the complete circuit, right?, the drawing is just to give an idea of the led part

Asked by tato312 8 years ago  |  last reply 3 years ago


240 volt timer ?

Hi all I have a 240v fog machine makes fog like a disco I wish to run it on a timer. For an outside dragon smoke display. I can easily time it purely off /on with a basic 24 hour  household socket cheap timer MY PROBLEM The fog machine after getting power needs a press of a button to activate it. I need a circuit / timer  so  that when it gets 240v power can then "press the button "ie activate I bought a hi tech machine to try  but it loses it's memory setting when timed out on  240v. I need something that keeps its timer cycle intact. Maybe an expert out there can help? Happy to modify something etc. Nick Tasmania

Asked by tassie2 6 years ago  |  last reply 6 years ago


how to keep 3 volt instead of going up to 6 volt

Hi, i have a honda camino , i want to make a rear light. first how do i get the 3.0 volt staying on 3 volt ac and what do i have to do if i use four bright white led in parallel,i have to have 5 watt in total.

Posted by alex4421 11 years ago  |  last reply 11 years ago


How to get 12 volts from 18 volts

How would i regulate 18 volts(2 9v batteries) to put out 12 volts instead? im doing this because 2 6v batteries is really heavy(im replacing 2 6v batteries, and they are also broken... dont ask how) thanks

Posted by ledzep567 10 years ago  |  last reply 10 years ago



How to increase an output of 5 volts to 9 volts?

I have a fixed input and the output is 5 volts. What type of design must I create to increase my output voltage to 9 volts with the already given output of 5 volts? I am trying to make this charger project as small in size as possible. Any assistance with this would be great. Thank you all!

Asked by fr3dd4 4 years ago  |  last reply 4 years ago


120 volt ac to 5 volt dc circuit?

How to build the circuit that is in those devices that plug into 120 volt receptacle and can have a usb charger cable plugged into it. I just need the circuit diagram. I am a little familiar with schematic reading. It all fits in that little plug in device, so it can't be that much, right?. Thanks.

Asked by stevecinstrfme 4 years ago  |  last reply 1 year ago


How do I increase the volts or amps of a 12 volt dc car battery?

Null

Asked by 9 years ago  |  last reply 9 years ago


how do you make a 12 volt heating element?

Asked by boyrock375 10 years ago  |  last reply 3 years ago


Powering a 24 Volt sensor with an arduino? Answered

Hello!   Ok here is the issue. Right now I am designing a rain water collection system by having my down spout drain into a 55 gallon plastic drum. I want to cap the drum to avoid spillage. The problem is what happens when the drum is full and the rain is still coming in. I know there are plenty of mechanical ways to solve this problem but I wanna have fun with an Arduino I have laying around. What I am thinking is run a pipe out of the bottom that has an irrigation valve installed (for anyone who is reading that that isn't aware of what an irrigation valve is, it is and inexpensive solenoid valve that is used for unground sprinkler systems). I figure I will add a water level sensor to the inside of the barrel and then hook the sensor and valve together via my Arduino. From there type a little code and violaa I have an over fill protection device! Here is the problem: An irrigation valve is 24v and the Arduino is 6volts. I know I can get the 24 volts from a power supply down to 6volts via resister, but then how would power the valve? My goal is to NOT have to buy a 12volt 1" solenoid (i didn't want to spend a lot of money on this project). I am not sure if there is a solution to this problem, but being a very green/inexperienced electronics hobbyist figured could hurt to ask. Thanks

Asked by Mpc1055 3 years ago  |  last reply 3 years ago


How many milliamp/hours is a duracell 6 volt lantern battery? Answered

How many milliamp/hours is a duracell 6 volt lantern battery?  I can't find this info anywhere on the web.  Thanks.

Asked by Noblenutria 8 years ago  |  last reply 8 years ago


How do you test a dc voltage regulator?

I have a dc volt regulator that reduces the voltage to around 12 volts. How can I tell if it is good or not?

Asked by DELETED_afw11 8 years ago  |  last reply 6 years ago


Illuminating Experience

Thanks to Andy-b and Joe for the 12 volt light ideas. I wanted to illuminate dug bottle shards embedded in home-made cigar box guitars. They have given me the means. Companies are selling similar lights for $29.95. Crazy!

Posted by trampart 11 years ago


can I activate a 24v relay using my house's power grid(220v)?

I am making an automatic  fish feeder and to activate it ? I'm thinking about using a 24v 1100ohm relay that I have laying around. My question is: can I do it? If not can I just put a resistor on it? It's supposed to be activeted a bout 15 minutes every day.

Asked by tgferreira184 6 years ago  |  last reply 6 years ago


Trying to change 120 volt AC to 120 volt DC.

I have the full wave rectifier rated at 400 volts and 8 amps and need to know what kind of capacitor/ voltage regulator I might need to accomplish this. I'm powering two 100 watt lights off this. Thanks!

Asked by evilgenius32 6 years ago  |  last reply 2 years ago


How can I raise 1 volt to 5 volts?

I have a TLC module that i can get to produce about 1 volt from my hand.  I would like a way to turn this into 5 or more volts.  Any help would be greatly appreciated.  Thanks in advance.

Asked by pianoman99a 5 years ago  |  last reply 5 years ago


What's the best way to lower 6 volts to 5 volts?

Hey friends!  I have a question. I want to be able to use 4 AAA batteries (6v) to power an IC. The IC's max voltage is 5.5. Is there any kind of way I can use two resistors as a voltage divider to lower the voltage 1 volt or should I just use a diode(which would lower it by 1.4v)? Thanks!

Posted by HavocRC 5 years ago  |  last reply 5 years ago


How do you reduce 6 volts to 4.5 volts? Answered

I am working on a toy truck that will play music, have headlights that will light and a gear system that will lift the truck up and down when a switch is pressed. The music (took from a stuffed keychain pig) and lighted headlights (Blue LED) work using 4.5 volts. My gear system use to use 4.5 volts to lift the truck, but now it won't do it. In order to lift the truck I have to increase the voltage power to 6 volts. If I increase the power of the gear system to 6 volts or more then it will fry my music and lights (however, I can make adjustments to the LEDs with resistors). The higher the volts are for the gear system, the easier it is to lift the truck. Maximum volts for the system are 12 volts. I know lifting the truck puts a strain on the system but the more power I give it; the better it can lift the truck. My goal is to use one power source and one switch. I thought I could use to different power sources (6 v and 4.5 v) and connect it to one switch, but I think it will fry of my music and lights. My question is: How do I reduce 6 volts to 4.5 volts, using 6 volts as my main source and connect everything to one switch? If I can get this figured out then this will help me with future project, where I need to use voltage reduction (or is it called voltage regulator). My knowledge of electronics is very low or enough to get me in trouble, which it has done. I am familiar with a few basic electronic terms and formulas. I will except and appreciate any help, ideas, diagrams, etc. Please use layman terms.

Asked by mates 9 years ago  |  last reply 6 years ago


What are the effects of powering a 14 volt system with 12 volts?

I have some older, but nice yamaha computer speakers. there is an external transformer, and it says the out put is 14v dc, 800 mA. I am wanting to skip the transformer, and us a 12 volt sealed led acid battery battery to power them, placing it after the transformer. I would prefer to use the 12v battery as a 12v 5 ah battery is around 25-35 dollars, and a 14.4v 2ah battery is around 70 dollars. Would this do any damage to the amplifier circuit within ? What effects would this have on the sound quality of the speakers? Would I be able to be switch from 12v dc, skipping the transformer, and plugged into the wall using the tranformer if i wired it to be able to do so, and would that have any long term effects on the speaker?

Asked by codycool55 6 years ago  |  last reply 6 years ago


Will a 240 Volt AC Motor Operate on 120 Volts AC

I need to know if a 240 volt ac squirrel cage fan motor can be safely run on 120 volts ac. An quick internet search reveals several sources that all say no, but I am concerned that the people answering the question don't know what they are talking about - as is often the case on the internet. I know there are a lot of want-to-be engineers out there ready to answer any question posed even when they have no experience or knowledge of the issue. Please do not guess at this or offer some unsubstantiated opinion.  I need a real answer to this question. Here is what I do know about this issue from researching a couple of electrical engineering sites. Lowering the motor input voltage by 50 % does several things. 1) The motor will run slower. 2) The torque developed will drop to about 25% of its full voltage rating.  3) This decrease in torque can make the motor stall when trying to start under a heavy load. 4) There may be drastic speed fluctuations due to load variations.  5) The motor current will double if the load remains constant. I can understand how these issues could cause severe problems in some applications, but perhaps not in the application I am looking at. I want to use a squirrel cage motor rated at 1/20 HP, 240 volts, 0.5 amp in a direct drive fan application. Here is how I am looking at this issue: - I need to reduce the fan speed so the speed reduction is a good thing in my application. - I have test run the motor on 120 volts for about an hour and there is plenty of torque to operate the fan. I figure at the lower speed there is less air load on the fan blades so less torque is required. Again a good thing for this application. The is no heavy load at start up and the motor seems to have plenty of starting torque for the fan. The fan does not reach full speed as fast as it does on 240 volts, but it still does so in about 4 to 5 seconds so this shouldn't be an issue either. Since it is a fan moving air and not some machine moving gears and levers the load is constant so the speed does not fluctuate at all. Again this should not be a problem. The possibility of the motor current increasing is my only concern so far and apparently it is not an issue since a test run showed the current decreased from 0.5 amps at 240 volts to 0.4 amps at 120 volts.That is a significant current drop instead of the predicted increase. Since this is a fan, I think the current decreases because the load decreases with the lower speed. For these reasons and based on my apparently successful test run I think the motor will operate fine on the decreased voltage. However, I am not sure how to factor the motor slip into this. Slip is the difference between the synchronous and asynchronous speed of an induction motor. From what I have read the slip will increase dramatically when the voltage is cut in half, but I am not sure what physical affect that will have on the motor. If you know what effect that will have or know of some other factor I am not catching please let me know.         

Posted by biochemtronics 6 years ago  |  last reply 2 years ago


3 volt voltage regulators?

Hi,I need a 3 volt voltage regulator,1 ampere(or lower).I tried looking for Lm 7803 but couldn't find it any local shops.Anyother alternatives?

Asked by Adarsh_tronix 6 years ago  |  last reply 3 years ago


120 volt flasher circut

I need some help finding a way to flash a 120 volt incandescent light bulb. Im looking for a way and have found close to nothing. if any one can help, thank you

Posted by newwarhammer2 7 years ago  |  last reply 7 years ago


100 volt ac motor

I have a Sony 100 volt AC motor and would like to use it with 120 volts.  Can anyone give me some advise? The motor came out of a Sony tape recorder.

Posted by ecafighter 4 years ago  |  last reply 4 years ago


Exploding 9-volt Batteries?

I have always wondered if 2 9-volt batteries connected pos. to neg. and neg. to pos. will it explode? Look at the picture if you need help understanding what I mean.

Posted by Thelonelysandwitch 10 years ago  |  last reply 6 years ago


Volts from an USB cable

I need to know how many volts a usb cable provides from a laptop. I couldnt find any information on google and I know that someone here has to know.

Posted by allstarn07 10 years ago  |  last reply 10 years ago


"5 volt limit" circuit? Answered

Is there a circuit that will take a range of voltages and make all of the voltages that are over 5 volts be 5 volts  like so: 3.5 => 3.5  4.2 => 4.2 4.9 => 4.9 5.1 => 5.0 6.3 => 5.0

Asked by flybye22 8 years ago  |  last reply 6 years ago


Volt conversion with mobile charger ?

Hi, I have to DC device  a) works with 5.V    (b) 1.5 Volt...  I am using mobile charger as a power supply.  How can i connect them with one mobile charger....as the charger output is 5.V  only.  a) works fine but as the other device require 1.5 Volts . Which type of power  component should i use to supply additional appox. 1.5 Volts ? will any of these can device blast ? Any type of tips n tricks will be very help full. Thanks, Richi

Posted by RichiV 3 years ago  |  last reply 3 years ago


boost volts deflate amps? Answered

I recently came to know about a "mintyboost" from "steveastrouk"( a very helpful and trusted member of instructables).It boosts up volts while bringing down amps very much like a step up transformer.Well I've got 2 AA rechargeable batteries rated 1.2 volts and 1900mAh.So here's my first question-I connect these batteries in parallel and they give out a total of 2.4 volts okay fine....but what about the amps?will they get added up like volts and produce 3800mAh current?The latter part-I need to boost this 2.4 volts to 5 volts by bringing down the amps(any value is fine as long as its above 0.7 Amps).Could you please give me a specificated instruction on how to do this?If to use a "mintyboost"what software should I use to calculate the required values and......... the rest...... Pls don't think I'm lazy.I really want to do this so badly...

Asked by Adarsh_tronix 6 years ago  |  last reply 6 years ago


About boosting battery volts? Answered

 If i use an XL6009 module to boost up my battery for example from 3.7 to 5 volts how it will effect on the battery my battery will drine much faster ?  will stay the same ? 

Asked by NivA2 2 years ago  |  last reply 2 years ago


Whats Better Volts or Amps? Answered

I know the two are completely different, just so you guys don't leave any I'm an idiot comments.  I was wondering if anyone knew what makes a better electromagnet for my coil gun.  Should I look for higher amps or just as many volts as I can find

Asked by jj.inc 8 years ago  |  last reply 2 years ago


Coil to give 3 volts

I need 2.5 volts from a coil when a 10mm magnet is passed over. What awg of copper wire and how many turns do I need for an air core coil. This is to charge a super capacitor.

Asked by edenordinary 4 years ago  |  last reply 4 years ago


4000 watts @ 220 volt?

How can i (step by step) generate 4000 watts and 220volt from a car alternator ?

Asked by nicobotha12345 9 years ago  |  last reply 1 year ago


How to generate 100,000 volts? Answered

For a special project I need to generate 100,000v to turn hydrogen into plasma.  Can anyone tell me how to do that?

Asked by Kalrag 8 years ago  |  last reply 8 years ago


12 volt incubator circuit

I need to build a dc circuit which will maintain a certain temperature using a globe as the heat source for the purpose of making a small incubator.?

Asked by gozitano 8 years ago  |  last reply 7 years ago


too many volts to an LED

I have an LED that is supposed to take about 2.8 to 3.4 volts.  A single 3v coin cell works great.  However, if I use two or three of those batteries, it gets ULTRA bright.  My question is, what harm is this doing?  Risk of burning out the light, causing heat, other bad things???  What exactly would happen over prolonged use?

Posted by aliasjanedoe 8 years ago  |  last reply 8 years ago


12 Volt Gas Generator

I am looking to building a 12 volt generator from an alternator. I want it to have a car battery (or a deep cycle battery if it's easy to integrate) for quiet operation. I want the output to equal that of a 12V car plug socket so I can easily invert it to 110 volt AC. the engine will need to be small as possible without stalling on high demand. I guess it would have to have the same circuitry of a cars main power circuit. So, can someone give me a few tips on making this? And most importantly, a schematic. I can't seem to find a basic car circuit.

Posted by physics_dude 9 years ago  |  last reply 7 years ago


How to convert ohms to volts?

I want to make a taser and the circuit i have needs an audio transfomer 1k to 200k but i cant find it coz im in india can anyone please tell me which power transformer am i supposed to use thanks in advance jumper1111(not my real name of course)

Asked by jumper1111 6 years ago  |  last reply 6 years ago


48 volt power supply

Hello everyone. i am interested in building a power supply from 0-48 volts and able to push a good amount of amps. any one have a ruff idea on how to beable to adjust the voltage and not limit my current to 2 amps i would like to puch say 15-20 amps. i can build the rectifier i have a 600v i think 30 amp bridge rectifier. just not sure on how to do the adjusting without useing a regulator chip that only pushes a few amps. any help would be greatly appreciated.

Posted by omnacron 4 years ago  |  last reply 4 years ago


Relationship between volts and amps

I'm working on a project found in this thread https://www.instructables.com/community/Solar-powered-cell-phone-charger-case-hack/ I think I'm almost ready to buy parts and start building but I have a small issue with getting the exact voltage and amperage output I need. I've been researching for hours and I can't find a simple answer to this problem. As I understand it, as voltage decreases, amperage increases to compensate and maintain wattage. Working on this basic understanding I've come up with this model. If I have a solar array consisting of 6 PV cells (1.5V 50mA ea) wired together I get 9V and 300mA. This is too much voltage and is on the low end of amps I want. If my math (and understanding of the subject) is correct, then if I use a 5V voltage regulator I will have a final max output of 5V and 433.3 mA which is right about perfect. Am I doing this right or is there more to it, like how I'm wiring the cells together? Am I correct in the idea that using a voltage regulator will increase my amp output? I'm not schooled in electricity in any way so I would appreciate any help I can get on this in as simple of a form as possible. Everything here I've put together from several hours of studying sites on solar DYI and electricity. Thanks. For reference, these are the solar cells I was referring to: http://cgi.ebay.com/High-Efficiency-Solar-Cell-32-22mm-1-5V-50mA-0-075W-/320541888508?cmd=ViewItem&pt;=LH_DefaultDomain_0&hash;=item4aa1c90ffc#ht_2428wt_1148 *EDIT* Below is a diagram of what I suspect may give me a 5V/490mAh output which would be absolutely perfect. I need to know if I can wire two different sizes of solar cells together in this manner and how it will effect the output.

Posted by HittingSmoke 8 years ago  |  last reply 7 years ago


I want to run my 12 volt power tools ( ridgid ) using a 12 volt lead acid battery

I have been doing this for years and I finally found this line of tools that is small and compact and the battery fits in the handle and it has tons of power  the lithium ion 12 v ridgid drill and job max line. I tried to wire up the tools contacts to the small lead acid batteries I normally use and even a full size car battery but it failed to power tool because there is this small contact that the tool is requiring which the lithium battery has but obviously the lead acid does not.  I do this for heavy duty use such as continual sawing and sanding and things like that.  any suggestions I really need to make this work as I run a mobile business.  I am looking for a solution to over riding the need for that extra contact and I am fully aware that I will void the warranty as many of you may be thinking. Please help 

Asked by captainj954 6 years ago  |  last reply 6 years ago