Search for DC converter in Topics

DC to DC converter

Hi ppl, for electronics A level coursework i am hoping to build a DC to Dc converter to use to power high power leds. As far as i understand it will convert DC to AC, use PWM to alter the current out, and then convert this back to DC giving a constant current out. These are available in devices (known as buckpucks) but for my coursework i hope to build a similar thing on Breadboard. This is really a question for the engineers and if they could give me some advice on anything to do with this it would be great! Thanks ppl

Topic by drummer ian    |  last reply

DC To AC Converter?

Hello, It Is Now Summer where I live, and it is getting VERY hot. I Want to put in an Air Conditioner, but whenever I do, My electric bill goes through the roof! I have an old car part (Cannot remember what it is called, its the part that uses the turning engine to charge the battery or something like that... I Cant remember) and I would like to use that (made into a mini wind turbine) to charge my spare car battery, and use a DC to AC Power Converter to power the air conditioner... I Have an DC - AC converter, but its not powerful enough... I Need To Build One That Can Power The Air conditioner.... Soon... Its Starting To Get REALLY hot... Thanks...

Question by Tuckoguy    |  last reply

Converting Dc to Ac

Ok this is my first post on this site so forgive me if i sound stupid...i like to tinker with things so just to tell a little about things i have done...completely rebuilt a pc..wired up an adapter for an old xbox to work on pc...the easier things....fixing frayed speaker wire....rebuilt/and upgraded a zune 30gb to zune 60gb the usual most proud is overclocking my amd 64x2 4000+ to 2.9Ghz.....everyone said it couldnt be done...........anyways on to my question.......i want to know what all i will need to convert Dc to Ac power for a set of old desktop speakers i found in my closet.......i have an idea of what i want to be able to do.......put them in a backpack and make it portable.....currently i have two old 7.2v 1200mah Rc car batteries that i would like to use to power it.....and i also have a charger for can charge and discharge...its old but now my next step is what else am i going to need to complete this project...i dont know a whole lot about electricity but know enough to follow directions...if someone has already done this or knows how to and could walk me through what i need to do i would greatly appreciate it....

Topic by Celestial_Artisian    |  last reply

AC to DC Converter

Anyone know how to convert an AC to DC without using the Neutral Cable. Just a Single Live wire. Is there a way to split the incomeing Live wire to positive and negative phase and convert to DC from there? ANyone have any ideas?

Topic by Paradigm812    |  last reply

Converting AC to DC

I have a single phase 3.5 hp AC motor, I would like to convert to a 12 volt DC.I'm no electrical expert but I think it can be done.From watching youtube vids and asking Mr. GoogleI understand a DC motor runs slower say 1750 rpm,where my AC motor spins at 3,450 rpm.I also understand a DC motor has brushes.Besides the speed being different, and changing the cord out,is there any reason WHY this couldn't be done?Any potential drawbacks?Any help or knowledgeable advice would be much appreciated.Thanks guys,skip

Question by xhdskip    |  last reply

How to make an BJT astable multivibrator run faster than 30Khz that works?

I am working on a dc to dc converter and it works but it seems to me that when i go higher than that it doesn't work anymore. I am using two C945 transistors. The resistor values for R1 and R4 are 1K and for R2 and R3 are 15k . For the capacitors C1 is 2.2nf and 1nf for C1. i have tried putting in smaler capacitors and increasing the two base resistor values. BTW its for a dc to dc converter that im working on. I also have no idea how much inductance on the inductor is. I am try to step up 6V dc to 15 V. It works put its low on power thats what i want.

Question by josh1001    |  last reply

convert 5v DC to 3.3v DC?

Hello would somebody help me with this please, I am not much of a "electronic" kind of guy so this is a big problem for me. I lost the power adapter of our office router WRT54GC (linksys) and my boss has his finger cross on me. I only knew of its power which is 3.3volts 2A DC. From my location, it is very unlikely to obtain a replacement or an equivalent adapter. I have salvaged a power supply of and old printer that gives off 5.0V 2A DC but the router would not run with this voltage. I will really appreaciate it if somebody would be able to help with a step by step explaination on how to lower the 5v to 3.3V . Thank you very much.

Topic by gincasty    |  last reply

Converting 12v DC to 5v DC

Greetings, I’m very new in electronics. I would like to connect my analog camera that uses 5v dc to my car battery. So I need your help to make a voltage converter. From what I have understand searching the web, I will be possible and very easy actually. All I would need is an opamp and some resistors?!!! Right? So any diagram or anything that you can help me with will be more than appreciated. Thank you for your time reading this. Best Regards P.S. I hope I’m in the right place writing this topic  

Topic by toqilula    |  last reply

How can I convert a 17vinDC to 20vout DC?

Hi Fella's I was wondering again if there is any schematics here that I can use to convert a 17in to 20v out DC-DC converter? Kindly send me a link please. TiA

Question by mitchiko    |  last reply

12VDC to 6VDC converter

Hello all, I'm new to the forum but I love the site and have been inspired by it for a while now. So, I'm working on a project to do GMRS radio communications between my wife and I between our motorcycles. The radio and headset part are pretty well taken care of but the radios don't natively accept vehicle power - only batteries. This is a bit of a bummer if you're on the road for a couple of days or more so I want to tie them into the existing 12 volt power on the bike. The radios have no plug for this but I'm assuming if I can knock the bike power down to the 6 volts normally delivered by the 4-AA batteries, I should be able to tie that in to the terminals in the radio that normally take the battery power. So, what is my best option? Hack a cellphone charger? Build from scratch? Size is a factor as it will be stored in the tiny glovebox in the tail of the bike. Any thoughts or links to appropriate stuff would be helpful! Thanks very much. -Ryan

Topic by compassrose    |  last reply

DIY 9V DC to 110V AC inverter, and/or 9V DC to 19V DC transformer?

Hi, I want to build a 9V/110V DC/AC inverter, so I can power up things like my laptop with a car lighter socket. It would be always nice to be able to use electronics in the car when I'm traveling... What kind of components will I need and how would the schematic looks like? If DC/AC is a hard task, how would I go about building a 9V/19V DC/DC transformer so I can at least power up my laptop on the go?

Question by ddolbi1    |  last reply

How to match the load of a DC-converter?

Hi! I'm having a few TEG-elements (TEP-1264-1.5) that I want to put best use of and plug them in to a circuit in one end and get a 5V USB in the other end! They are acting somewhat similar to solar panel and a matched load (in this case 2.0 - 2.8 Ω for each) is needed for optimal performance. They will provide during matched load 2.5-4V and 0.5-1.5A and I'm planning on putting two of them in series. I have been looking at a MPPT design, but those seem to be based on the fact that they are charging a 12V battery that can accept a wide range of input voltages and therefore it's possible to have a DC/DC converter that just adjusts the conversion. In my case I wan't exactly 5V but I can accept various currents 300mA - 1000mA, so if I know my Ohms law right I should be able to get a load resistance of ~1 - 16 Ω which is quite far out of range. Is there any way to design a circuit that has a matched load of 2.0-2.8Ω (or will it be twice if they are in series?) while still being able to give a constant output of 5V?

Question by Granstubbe    |  last reply

I am looking for instructions or tutorials that would be helpful in building a DC boost converter to convert 9.6V to 12V

I am looking for any kind of information that would assist me in building a DC boost converter.  I understand how a DC boost converter works but don't know the math behind it so I am unclear about the types of capacitors, transistors, inductors etc I would need.  Any help in how to calculate these values or how to build this circuit would be great!  Thank you.

Question by mezi24    |  last reply

need to covert 6v dc to 12v dc for CB radio

I want to build a 6-12v dc converter so I can use a CB or FM radio in an antique car (1930).  The car uses 6v positive ground power. There are small commercial units available for about $100  but there's got to be a less expensive alternative. Thanks!

Question by beast_3    |  last reply

How to convert dc to ac? Answered

Hi! Can anybody tell me how to convert dc to ac i actually want to convert 9volts dc to 9 - 7 volts ac cause i need to supply this ac voltage to a step-up transformer so that it will convert it into 200volts the real problem is when i provide 9volts dc to the step-up transformer it only gives out 41volts in output but when i gave it 9volts ac from another transformer it gives out 200volts ac and that's what i need but i need it to be battery powered so i need to convert the 9volts dc supply from the battery to 9 or less volts ac that's all i want to ask how to do it!

Question by ubdussamad    |  last reply

Arduino DC-DC converter? Answered

I have an Arduino project which drives a set of 12V LEDs using NPN transistors, I had been using the linear regulator on the Arduino to convert 12V to 5V for the Arduino and Ethernet shield, however I have some IL1205 DC-DC converters which could also be used, personally I think the IL1205s are the better option as they seem to dissipate less heat then the regulator on the board. Are there any other solutions to this, It would be ideal of I could power the entire project from a single 12V power supply, it also has to run continuously so must either produce little heat or be easy to dissipate the heat away from. Also because of the circuit I have to bridge the -Vin and -Vout terminals of the converter (for the transistors to work properly) I assume there is no problem in doing so. Any help is greatly appreciated. Thanks, Dan

Question by DanNixon    |  last reply

DC to AC Converter Circuit

Hi, so I have a sound amplifier that is designed to run off of 18-28V AC power, but I want to try and run it off a 24V Battery, can anyone give me a circuit that would achieve this?

Topic by Fozzibehr    |  last reply

AC to DC power converter?

I'm looking for an AC to DC power converter.  It needs to be 110V input and i need at least 30 Amps of output.  Output voltage is not as crucial but at least 50V would be ideal.  I need either a product i can purchase or instructions on how to build.  Im not an electrical guru by any means so purchasing a product would be better.  I am aware that this is going to be costly.  It does not have to look nice.  I will be wiring it directly into a unit and will have my own casing.  Can anyone help?

Question by aeudy    |  last reply

How do I build a DC-DC boost converter?

Hey Guys! I want some advice regarding boost converters. I want to charge a capacitor rated for 450v 1150uF using a boost converter with input voltage >12 volts. What kind of inductor values will I need? What should be the duty cycle and frequency of the square wave generator? And is there any formula to calculate this or a calculator? Thanks in advance, IndianHacker002

Question by IndianHacker002    |  last reply

How to limit amp draw of motors?

I am building an ROV that uses four thrusters, each can draw up to a maximum of 3-5 amps (motor says 3, website says 5 here). However, I will need to step up the voltage and I cant find anything that provides more than 10A continuous (currently using this but open to a higher amp option), so how can I limit the current the thrusters use in order to make sure that I dont blow out the DC-DC converter?

Question by OlliM1    |  last reply

How do I connect a PVD-150-31RS ( I can not find schematic anywhere?

I want to use this to regulate my variable volt ( 150+ volts DC) pedal power unit. This Martek power Inc. regulator is perfect and cheap. I don't want to do it by gut feelings, destroy it or even harm myself. I have build several 12 volt regulators but current supply ( 12+ Amps, expensive to build) is my mean concern.

Question by bigplate121  

How to convert 12v dc to 24v ?

Is there easy way to convert 12v to 24v.Found some circuit diagrams to increase voltage but dont know they are working. I brought a snail horn for my motorbike but it's sound very low. i know my motorbike battery is the reason for this, I need to increase voltage to make my motorbike horn louder. i'm currently testing 555 timer voltage doubler circuit on 123d circuits.  You can simulate it here  555 timer voltage doubler Give me a straight answer for this.. 

Question by ishan udyoga    |  last reply

how to construct 5000 AC to DC CONVERTER?

I have 5000 variable AC voltage. i want to convert 5000 volt variable DC voltage. please tell how to convert? and  components requirements ?

Question by selvakumarcns  

Modifying a DC-DC boost circuit

I'm building a circuit that would run off roughly 7v and convert it to 12v using the LM2577 (LINK). the datasheet (LINK) provides an example circuit that will output 12v @ 800mA. I need a little more power than that. around 1.25 A. my question is that if the 100mH inductor was replaced with a larger one. say a 150mH one, would that increase the current output? i would also replace the 680uF cap with a bigger one to reduce ripple. FYI the LM2577 is rated to convert 3.5v-40v to 12v. any information or direction would be appreciated picture is from the national semiconductor datasheet page 3

Question by stapler117    |  last reply

help me to create a simple dc circuit

Anyone help me to create a simple dc voltage converter circuit..?(ONLY CIRCUIT DIAGRAM) input of circuit  :  4.8v (1.2v X 4 rechargeable cell )  or 6v (1.5v X 4 dry cell) output of circuit  :  5v 350mA. not use IC chip. can select input battery(voltage) selector swich. for my next instructable, you must help me.....

Question by aravind r p    |  last reply

how to convert ac to pure dc? Answered

I want to convert 5volt ac to 5 or less voltage! i got  a transformer it gives out 5volts dc! i used four diodes bridge ! but the current is still vibrating i came to know this by using a simple white led it vibrates! although the diode bridge converts it to dc but not in pure dc format help me!! can anyone give me a simple circuit to convert it to dc ( i have used diode bridge but it it is still vibrating i need some more out here to make it!!  )

Question by ubdussamad    |  last reply

How to connect a 12v/5v dc converter to a standard 12v plug? And still use the plug?

I need to power both a Raspberry Pi and a 12v touch screen from the same 12v source. I know that I can use a dc voltage converter (like this one: to step the voltage down to the 5v for the pi. The power supply has the circular 12v adapter (e.g. My question is how to I attach the voltage converter to the 12 supply, and still be able to use the 12v supply for the touch screen? Thanks!

Question by mwbuksas    |  last reply

12vdc to to convert ? Answered

I have one supply unit at 12 volts and i want to get 5 volts also. i need resistance or voltage regulator like lm317?

Question by napoleonis    |  last reply

ac too dc

Is there a way to convert dc too ac power?

Topic by minecraftpotato    |  last reply

I need a diy solution to boost 6V DC to 12V DC @850 mA

I have torroids from pc power supply units, loads of transistors, 555s, uControllers, diodes, caps... all sorts of stuff.

Question by yaly    |  last reply

I want to build a 12V DC 0.20A power source

 with 230v ac as I/PI know I have to build a rectifier a full wave, but how to get a particular 0.20 A current plz help....?

Question by anuk07    |  last reply

Anyone know where I could acquire a 120VAC-24VDC converter that outputs ~20A? Answered

Preferably at a price that doesn't break the bank.  I've been thinking about setting up a UPS for a robot that I'm working on, and 20A should be a bit higher than the amount of current that it would draw when up on jacks.

Question by killersquirel11    |  last reply

Is it possible to connect FEMALE Usb Jack to the DC DC converter without usb? Answered

 Can I add the female usb jack to this board? bcoz to buy this board is cheaper huhu. Thanks for answering  in advance

Question by miraheng    |  last reply

Circuit Design for DC to DC Buck-Boost Converter

Sir, I am Anand from india, I will made a project based on bicycle. I have take 5 to 80v From my Bicycle pedals. Generator power is in AC 3-Phase. I want to made next step. in this I want to this 3-Phase AC 5 to 80V are constant At 48V DC. I put the 4 batteries in series. 12V 20Ah battery I use. I want to charge this batteries please help me. Thank you.

Question by AnandC10    |  last reply

Convert DC Light bar to AC

I'm trying to help out a friend. He's an animation student and he frequently has to use a light box while he's sketching. For those unfamiliar, he draws on a paper, and then puts another paper on top and traces it again, but with a slight change from the first. This process continues over and over until the animation is complete. In order to be able to trace, he's got a piece of white plexi (with a 90° bend in it) as his "table". He then places an off the shelf Energizer "Under Cabinet Light" under the plexi. This light has a fluorescent bulb and is powered by 8 AA batteries. Simple calculations means it's running on a 12V battery pack. Since he's often doing homework for 6 hours straight, the 8AA batteries become costly and the light dims over time. He was asking if I could hack the light to take AC power instead. I have an old wallward ac adapter that has these specs: Input: 120VAC 60Hz 30W Output: 12V @ 1.2A. I also took pictures of the circuit board I found inside the light. While I can't distinguish exactly what's on the board, I can pick out a capacitor, a transformer and some sort of regulator. I should've  got a quick schematic... from the looks my google searching, it's a simple fluorescent lamp circuit. Would it be as simple as stripping the ends of the AC adapter and soldering it to the positive and negative contacts on the light bar's circuit board? The adapter itself takes AC and makes it DC so it should work right? Another thing he is thinking of is having me swap out the tube for LED's. I'll just need an LED driver and I can use the same power supply I found in my junk box... it's just a question if the high powered LEDs would be bright enough. Surely if the tube is bright enough on fresh AA batteries, 3 high powered white LEDs would be brighter right? Also he's on a budget, so the AC/DC hack would essentially free for him!

Topic by mrsayao    |  last reply

high capacity joule thief/dc-dc converter

I'm trying to make a dc-dc converter with the following characteristics: Output = 5V regulated at up to 30mA = 150mW Input 1V (or lower) from a slightly flat AAA. Assuming a pessimistic circuit efficiency of 50%, then the input current would need to be 150mW / 0.5 / 1v =  300mA which I think a AAA is capable of supplying. I'm using a variation of "led torch circuit 2" from, but I've replaced with the 1n4148 with a schottky diode and replaced the 2 LEDs and 29R resistor with a 5k6 and 1k resistor respectively; this should limit the output of the circuit to just under 5v. I have a 150R resistor to provide a 30mA load to the circuit. When the input is 2.4V, the output is 4.62V which is close enough to 5v for me.  But if I decrease the input voltage to 1.14V, then the output voltage falls to 2.7V which is not enough. I have tried half a dozen hand wound transformers with various turns ratios, wire thicknesses and shapes (slug and toroid) but am unable to achieve 5v out (at 30mA) from 1v in. Does anyone have any suggestions as to what to adjust, or perhaps a better circuit?

Topic by GrotBox    |  last reply

Desktop PC DC - DC UPS ?

This might sound stupid, but I was watching some guys build batteries to Electrical Cars using Laptop batteries like Tesla does (18650 battery Cells)  and I got thinking about creating an UPS for my PC. If Im not mistaken, most UPS convert AC to DC current and in a mains power loss they convert back DC to AC which is not very efficient I assume. So why not instead of going thru that process, why not power the PC components directly from the UPS in the event of a power loss or power supply failure?? My idea was to build a UPS that works completely on DC power, from its input to its output. So the PC power supply would charge it and the UPS would power the PC components in case of a power failure. I would be using this on a server so I dont need monitors or other stuff. All that would be require would be power regulators for 12V, 5V and 3.3V right? Wouldn't that be more efficient? (the battery would last longer due to less power loss on conversions I think)  And wouldn't it be cheaper?  Thanks, Ralms

Question by RicardoM146    |  last reply

how can I convert an ac welder to a dc?

I have a microwave oven transformer welder that I made and it works ok, but I woul like to convert it to dc. Any information will be appreicated. Thanks

Question by sakimoto    |  last reply

How do I convert AC to DC? Answered

I'm running a circuit using 24 volts DC and the power outlet in my country supplies 220 volts AC. What circuit does it?

Question by yonch    |  last reply

Does anyone know how to convert 9vdc power to 12v dc power?

Does anyone know how to convert 9vdc power to 12v dc power? ive looked all over the internet and nobody seems to have any schematics for anything like it. It needs to be about one or two square inches. Its for a pellet rifle with a built in air compressor so i can travel through the woods and not have to worry about going back to the truck and airing it up. please email me at thanks

Question by mongoose_08  

Boost Converter help

I need a dc-dc boost converter that will step 25.9 volts at 2600 mah up to around 388v at 360 ma will I need a battery back with a greater amp output I can get up to 12000 mah at the same voltage any suggestions I am trying to charge a .1 farad cap bank that consists of only 10 caps Any help is appreciated -TDC

Topic by ThinkDesignConstruct    |  last reply

Why do DC-DC buck-converters not start at 0 volts? Answered

I have been looking into DC-DC converters to build a variable power supply but I've haven't been able to find one which starts at 0 volts. Most of them seem to start at 5-10 volts with the lowest I've seen starting at 0.8 volts. Is there any reason for this? Thanks,

Question by Smret45    |  last reply

50 Watt LED Wired To DC/DC Converter

Hello, I want to wire a 50 watt led to run off of 12 volts.                                                                                                                                   here is info on components:                                                                                                                                                                                    50 watt led                                                                                                                                                                                                           forward voltage:30-36 Vdc                                                                                                                                                                                  forward current: 1750-3000mA                                                                                                                                                                                                                            DC/DC converter:                                                                                                                                                                                                  input volts: 12DC                                                                                                                                                                                                      output volts: 48DC                                                                                                                                                                                              output current:3A                                                                                                                                                                                                Can I use resistors to make this work?                                                    

Topic by flatfish    |  last reply

how to reduce 5v dc to 2.5v dc?

I need to reduce a 5v power supply to 2,5 v for a certain application, I've got a converter that can do it, but want to do it using some electronics any ideas?

Question by fjchorn    |  last reply

cheapest way to convert dc to ac?

What is the cheapest way to convert dc to ac.i need a cheap an simple solution.i don't need a circuit that convert 12VDC to 220VAC i need a 12VDC to AC circuit

Question by vina1991    |  last reply

i want to convert DC to AC supply.and i want the circuit please help!!!!?

I have a dc 6 volts, which i want to convert to AC, so that i can power my plastic core transformer. and also i need an amplifier circuit. PLEASE HELP!!!

Question by sheetansh    |  last reply

how do you convert DC to AC?

Please will you tell me how to convert DC to AC?

Question by Dumchicken    |  last reply

Converting 1A to 5A

I have 12V 1.5A AC transformer. I want to produce DC 12V 5A amps from it. Is it possible? If it is, than tell me HOW...

Topic by Shezi007    |  last reply

easy way of converting dc into ac

Does anybody know of an cheap simple circuit, using only a few components, to convert dc into ac or pulsed dc? I'm going to be using a super capacitor that's rated for 2.5 volts and I want more out of it, so the output is going to be put through a voltage multiplier circuit.

Topic by guyfrom7up    |  last reply