How to make boost converter that will convert 3.8 volts to 5 volts for my android????
Question by PavleP | last reply
I make the rwilsford07 boost converter, but it doesnt work. The mosfet start heating and only gives 2v. I check the oscilator and is working perfectly, I try diferent things butit doesnt work. Before I make 120v, but I dont know how it stop working, I nad rebuild the circuit like three times but nothing happens. Can you help know why is this happen?
Question by Kurt Gerhard | last reply
I am making the rwilsfor07 boost converter, I already have the timer but the mosfet isn't working; I think that didn't work but I am not sure. Should I buy another one or buy a IGBT: http://www.ebay.com/itm/IGBT-Power-transistor-FGL60N100-1000V-60A-180W-TO264-/170643487614?pt=LH_DefaultDomain_0&hash;=item27bb24fb7e#ht_2150wt_758
Question by Kurt Gerhard | last reply
Recently I bought a Blender imported from US(to India) which runs on 120V 60Hz. I need a converter which Converts 240V 50Hz to 120V 60Hz. I got an idea of using a rectifier-inverter circuit such that by varying the gate signal can accomplish the aim. Is this idea a possible one?
Topic by ravic88 | last reply
Well, I've posted this in numerous places and no one seems to have a clue. Myself being electronically illiterate, still, with all the technology out there, you can't tell me this can't be done. I live off-grid. We all know how inefficient the inverter is. It's a huge drain on my battery bank, won't function when they get below a certain voltage, yet all my peripherals that operate directly from the battery bank, operate fine. That being said, I have been trying to come as close as possible to eliminating the inverters and I have two peripherals left: 1) cordless telephone and 2) modem The problem is that they run from that pesky wall charger/converter from 120VAC to 6.5 and 9VAC respectively. Now, notice these units run on LOW VOLTAGE AC, not DC. That is, they are powered by the AC. My guess is that inside each unit, there sits a rectifier converting it right back into DC. In fact, for the phone, I see no other way because it charges a NiCad battery. So.... does anyone have an inkling as to an efficient way to convert 12VDCD to low voltage AC. Preferably variable, but not absolutely necessary. There is nothing on the market that I have found. So if you're looking for something to have to break into the electronics market with, here ya go. I'll bet there are hundreds of thousands 'off-gridders' who would want this technology.
Question by basementsong | last reply
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 tried this circuit using a 3.7v supply and instead of a 12v Zener I used a 5v Zener. I also used a 22uH inductor. I get 5v no load but when I add a load the voltage drops a bit and the current is 50ma max. Why is this not working and what could I change to make it work? If this is the wrong circuit altogether, then what discrete circuit would work? http://www.aaroncake.net/circuits/6-12conv.asp
Question by Davis Lambert | last reply
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
My motorhome has a115v ac to 12v dc with a split transformer, the 2 outer leads went to press in diodes and the middle lead went to neg or pos.(cant remember witch) it is 40amp converter. one of the diodes was bad and i was only getting 6 volts out so i replaced them both with 40 amp 600 volt ZENER diodes. Are the zener diodes the wrong type to use, all seemed good except my neg and pos polarity were reversed coming out of the power converter, I reversed the terminals at the hook up so polarity would be correct. Could this discharge my battery when its not connected to 115v. Thank you, Duncan
Question by dsr. | last reply
Am trying to put a boat radio on my patio, plugging into house current. The radio uses a 10amp fuse. All $5 converters I find on the net are for cell phone chargers and the like. I don't think they have the power I need. Have seen something about using an old PC power supply, but I'm not sure it will stand up to the weather, even though it will be in a box, and I don't know how to determine which outputs would be 12 volts. Anything I have found is WAY over budget...I'm trying to find something for less than $25. Am I on fools errand? Are there options I don't know I have? Any help is most welcome! ***REVISION*** I should qualify....the radio is actually an AM/FM CD radio, not VHF or Ham. Sorry for the confusion.
Question by craigo | last reply
I intend to make a devise where it would have an impute of 120v ac at 60Hz and have a output of 120v ac at a frequency between 10 and 60 Hz and could be changed with a variable resister in fine increments. this also needs to be able to handle 10 amps. any ideas, I would appreciate all help
Question by alexander.m | last reply
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 email@example.com thanks
Question by mongoose_08
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: http://amzn.com/B00GQ4DTGQ) to step the voltage down to the 5v for the pi. The power supply has the circular 12v adapter (e.g. http://amzn.com/B00GUBVI9K). 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
I might need to do this when there is an electric outage, can we connect an SLA to inverter (110v) to a converter people use when they travel to 220 v countries?
Question by celalboz | last reply
I have an old TV that I want to convert so that it's able to be used as a monitor for my camcorder. The TV however only has an antennae and screws on the back for a circular UHF antenna. It's an old RCA Model EJR 291S black and white tv. If anyone has any ideas let me know.
Topic by mrshow555 | last reply
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
I need to measure the inductance(L) of a certain coil I have wound.How do I do it experimentally without using LCR meter?
Question by pmadithya | last reply
Hello every one, Since i am totally new to PCB designing and all these stuff, I want to know few things about Eagle CAD tools I will be designing a Frequency up-donwn converter as a University course project. out of many components selected for this project one of them is as follow. http://www.hittite.com/content/documents/data_sheet/hmc523lc4.pdf i have gone through designing of the LC4 package, i hope it would be fine, still i would like to know how to creat ground of a package, creating outline boundries of package (is it from wire or from rectangle, polygon??) and about symbols inside this package, i am confused about drawing them exactly and connecting them to each other (via wire or net or what??), should they be just symbol or e.g i have to draw even what is inside circuit of a mixer or amplifier etc.. I shall be very much thank for your kind help
Question by lali2
I recently purchased a normal set of white LED christmas lights for my apartment. But recently I saw similar units that run on solar energy. I was wondering if there was a way to convert the sets that I have into either battery powered or solar powered.
Topic by mrshow555 | last reply
I am trying to find a practical way to build a device to convert magnetic energy into electrical energy, some kind of generator or other device, there are several ways in which this might work in theory but actually building the device would be more difficult to figure out.
Question by thedriftcore | last reply
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
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
I came across a CATV CONVERTER Jerrold 550 model # DP7113 and when i tried to hook it up to my TV i got a blue screen . channel 4 was the only channel that was somewhat visible . if anyone can please give me some basic instructions i would appreciate it very much thank you
Question by rottieowner90 | last reply
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
Hello, I want to connect a portable solar powered rechargeable to 2 DC fans of 12v to cool my car. 1. I have 2 options of portable solar powered: (A) 1500mAh, outputs: 5.5V / 800mA (B) 2000mAh, outputs: 5V 500mA which one is preffered to connect to those PC fans? 2. most of the PC fans are working at 12v. I don't quite sure if I'll build simple 5v to 12v regulator it will works and produce enough airflow. Thanks.
Topic by ashakif | last reply
How does a Floppy Disk Converter work? Heres my problem. I have recently bought a laptop which has Windows Vista. I have an old desktop computer with Windows 98SE. I have no floppy disk drive on the laptop. I want to save the material on the floppy disks onto a USB memory stick. I bought a USB that works for Windows 98SE only to find that you need to download drivers for it from the Internet before it will work. So I plugged my Broadband connection (which is from Vodafone) into the desktop computer to get an Internet connection only to find that the Internet is too new a version for Windows 98SE to read so therefore I cant download the drivers. Also I thought I could save to CD and then put the CD into the laptop to save them to the hard disk but the desktop only has a CD-ROM whereas the laptop has CD-RW. So that wont work either. So I was wondering if a Floppy Disk Converter would be the answer to my problem. Like do you just insert a floppy and a USB into the Floppy Disk Converter and transfer the files. Do you need to connect it to a computer. Sorry for rambling on but I have so many questions about it and I really want to know before I go out and buy one only to find that it is also useless to me. Thanks
Hi everybody ! I'm currently working on a speaker project, and I want it to be powered by 4x 18650 3400mAh 3.7V batteries in parallel, but when they are recharged (with a separated 18650 wall charger), I want to be able to power my speaker from a wall power supply. The idea is to get the 5v power supply voltage down to something between 3.7v and 4.2v, in order to mimic the battery voltage. I already chose this one which is a 10amp-capable power supply in order to be sure to always give the speaker enough current (speaker current consumption is between 0,55 at medium volume and 3 amps a maximum volume). I first thought that i would use this board to convert 5v to 3,7v but it's only able to output 1.25 amps max so I need to figure out a way to convert 5v to 3.7-4.2v without loosing a lot of current. I've heard of low dropout regulator (LDO) but I cannot find one capable of delivering 4amps or more... Any help is appreciated ! Mahot
Question by boulou | last reply
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 stuff...my 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 them...it can charge and discharge...its old but works....so 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
To Linuxism. Please, hold your applause. ;-) A handful of you may know that I've been fumbling with Linux since early in this year, tried every distro known to man (and then some) and didn't get heads or tails of it. Well, it finally clicked. I don't know how and I don't know why, but it did. I'm running Ubuntu 8.04 Hardy Heron and I plan on updating to 8.10 when it comes out on the 30th. Out of all the distros I've found, Ubuntu's the easiest, and Hardy Heron is better than any earlier version I've tried. I customized it to look how I want, and installed some of my favorite programs. It runs off of my 2gb flash drive at lightning speed, but when I upgrade to 8.10 I think I'll install it on a 4gb SDHC card. Of course, this doesn't mean that I'm a Linux leet h@x0r or anything. Linux is a journey of knowledge, and I think I've finally got off on a good start.
Topic by Labot2001 | last reply
I've read that catalytic covnerters use platinum and hydrogen fuel cell required platinum. So is it possible? and is it a cheaper/more affective way to make a fuel cell then by buy platinum to build the fuel cell or buying an actual fuel cell?
Question by Sun Gear | last reply
Hello Guys, I have one unused old SATA hard disk(in working condition) now i want to make this hard disk to use like external but i don't know how it is possible so, please help me for making my project i know, there are converter is available in market but i want to make it my own.... :/ so please help me guys.. Thanks in Advanced
Question by h4hardip | last reply
There are several circuits out there on how to up-vert a 3v input to a 5v input, hwever I would like to know the simplest way.
Question by Sargebubbles26 | last reply
I have a sharp lq035q7dh02 lcd screen from a pocket pc pinnout can be found here an i want to make a converter from vga so i can use my pc with it i could also use a dvi
Topic by kajin41 | last reply
Hi, brought two boost buck converters to build a bench power supply from a atx psu. Brought the LM version first as i have read previously that these are quite efficient, then seen the LTC one, so thought i might as well buy that as well. Looks like the LTC board will be able to go down to lower voltages and appears to have a greater efficiency, quoted up too 98%, compared with the LM's at around 80%. Thou i understand that with adjustments changes efficncey. LM2577S LM2596S http://www.ebay.co.uk/itm/281777880409?_trksid=p2057872.m2749.l2649&ssPageName;=STRK%3AMEBIDX%3AIT LTC3780 http://www.ebay.co.uk/itm/332009159315?_trksid=p2057872.m2749.l2649&ssPageName;=STRK%3AMEBIDX%3AIT Which one do you think i should use? Regards
Topic by JonathanM221 | last reply
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
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
Hi All I look after some feral cats and I am trying to improve their health by encouraging them to drink more water by putting a cat drinking fountain close to their colony. Cats are known to develop kidny problems because of their refusal to drink stagnate water. They see stagnate water as a potential poison. The fountain is powered by mains as per the link below. I was wondering if someone here with good electrical knowledge could pointing me out in the right direction to get this project started. Ideally I would like to get it powered by a battery powerful enough to last a few months or more. I have heard of inverters, but I am not sure if this is the solution. It has to be some sort of standalone mini power plant, because it will live the wild. The power adater is similar to the one in the link below: https://www.amazon.com/dp/B0017VXNVY/ref=psdc_2975263011_t3_B01AKN15KA This is a humanistic project, and I would be grateful if someone could help me finding the solution for this matter. Thank you. A
Question by Alienontherun | last reply
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
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. #.....do not use IC chip. #.....you can select input battery(voltage) selector swich. for my next instructable, you must help me.....
Question by aravind r p | last reply
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
Greetings, I would like to know how to make a frequency converter. I want to convert the 2.4 GHz from a WiFi transmitter to one fourth or 600Hz which is in the newly freed up white space area for greater range. Anyone know where to find schematics for this, or make schematics? Is the circuit complicated? Thanks
Topic by NeuroPulse