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Boost converter?

How to make boost converter that will convert 3.8 volts to 5 volts for my android????

Question by PavleP    |  last reply


Boost Converter?

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


Boost converter?

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


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


Boost converter LED brightness?

Will a boost converter IC (such as the one from maxim) ever be able to power a high power LED as brightly as when the LED is powered with a constant current source?

Question by .Unknown.    |  last reply


Overheating mc34063 as boost converter Answered

I've been using the mc34063 in boost converter manner to build an external battery circuit for 3.7v->5v DC-DC conversion, but within few minutes of operation the chip and the inductor begin to overheat beyond touchable (light smell of burning components too), occurring with both circuits that I had. I've tested using the following devices: ipod touch 2G, ipod touch 5G, kross g6 tablet, all of which had the circuit overheat. The power source is 4 cylindrical cells in parallel @ 3.8v ~9A with protection circuit. The batteries do not overheat and I'm guessing the protection circuit regulates the current to an extent. I've tested the current draw of the ipod 5G to 100mA while the circuit is wired for 500mA. This is what the schematic looks like: http://www.eeworld.com.cn/uploadfile/dygl//201210/20121025102243965.png I would like some help in troubleshooting the overheating of the circuit, Thank you.

Question by Ahyku    |  last reply


Why does this boost converter circuit not work?

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


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


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


Which Boost/buck converter? LTC3780 vs LM2577S LM2596S

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


convert 12v to 14.5 v simple? Answered

Hello. i have an LCD monitor powered from AC, that i want to make to be powered by DC for use in my car. the monitor PSU , supplies the controller with +5v and +14.5v. and i want to power the monitor from a regulated 12v psu. my question is, how would i make a dc booster, from 12v to 14.5 v at 2 ampere? thanks in advance!!

Question by settra    |  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.

Topic by AnandC10    |  last reply


motor as a generator + buck converter

Hi, for a school project, I have to make a wind-powered smartphone generator. So would I be able to use a 12v motor as the generator and a boost converter to convert the current to 5v? If so what kind of voltage will the motor produce? And what kind of diode will I need to prevent backwards current?  thanks. 

Question by MukymooD    |  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


Boost curcuit amperage issue? Answered

I am planning to make a small boost converter similar to mintyboost. I am using a boost IC that will give me about 92% efficiency with the voltage i have. The output is 5v at 500ma, and the input voltage is 2.4v. Would the ic suck up more than 500ma per hour from the batterys?

Question by astroboy907    |  last reply


Too much voltage for dc USB boosting converter ?

I have a 6v rated solar panel but am also using 3 rechargeable aa batteries, 3.6 volts. My USB boosting converter is rated for 3v-5v input and obviously outputs 5v. Would the 6v solar panel damage the boosting converter if it were to output 6v? thanks!

Question by Stevemills04    |  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


How do i make a 1 amp boost converter that converts between 3-5v to 5v?

Hey, so  have been buying pre built boost converters but i wanted to build my own, my question is, how can i make a step up boost coverer circuit that takes between 3 and 5 volts and converts it to 5 volts at 1 amp. In you answer could you explain what each part does? Thank you!!!

Question by jbdawinna    |  last reply


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


My dcdc boost converter is overheating when i tried to charge 35ah 12v car battery with 12v 1ah transformer with bridge rectifier

The output voltage of boost converter was set at 14.5v [no load] When i turn on the input power supply the output of the boost converter read 12.4v the battery's voltage. If i tried to increase the output voltage of boost converter using the potentiometer, the output never changed. If the battery load is removed the boost converter showed the voltage increase.

Question by HarishR56  


How much does a camera flash circut boost voltage?

I want to know how much a standard flash camera circut boosts voltage. I'm trying to build a railgun and I simply wish to know about how much it does, as I cannot afford a multimeter or voltage meter. Information welcome.

Question by StartedBullet    |  last reply


how can i boost the current from 2A to 6A while keeping the 19V from my dc-dc converter?

I have made a dc-dc converter to run my laptop of a 12V (car) battery using a lm2588 switching regulator. But my circuit isn't powerful enough. I can get a maximum of 2A out of the converter. Is there a way to boost the current to a maximum 6A?

Question by ForwardUntoDawn    |  last reply


dc-dc Buck vs boost efficiency

Hi guys. When you  use solar panels and have gadgets with different voltage requirements  that you want to power up. I need atleast  2 different outputs, 5v and 12v  ,   so which is most efficient ,  12/15v panels that you  regulate to 5v , or  5v panels boosted  to 12v? is there any general advantage in either case and i,m talking about using  cheap ebay switch regulators / boost converters,  not anything expensive hi tech. regards

Topic by kristerh    |  last reply


I make the rwilsford07 DC-DC HV Boost Converter and it only gives 32 volts

I want to build the DC-DC HV Boost Converter but it only gives 32 volts from a 9volt input. The output voltage depends on the number of oscillations? I am using coilcraft PCV2-394-05L and the mosfet 75N75

Question by Kurt Gerhard    |  last reply


Mobile phone wind generator

Hi at school, I am making a mobile phone generator. It's only GCSE so my apologies for my lack of knowledge. It is meant to be a "wind generator" but it can basically be a renewable generator via motion. So since I get to take it home afterwards I designed it to be a little record player where you turned the platter and it would change a phone. This is where I need some help. Would this 24v motor provide enough juice to charge a lithium ion battery (with a boost or buck converter [if needed to step down to an appropriate voltage] then a constant current protection circuit etc) the output 5v to charge your phone? Here is the motor: http://uk.rs-online.com/web/p/products/2483716/?grossPr...|pcrid|88056614883|pkw||pmt||prd|2483716&gclid;=CjwKEAiA4dPCBRCM4dqhlv2R1R8SJABom9pHi1B_sRuR-4nr15ce-EWd51aCsEfYqFBsUJioUXEpvRoC1unw_wcB Thanks! For non-British readers :  a GCSE is (in the UK except Scotland) a qualification in a specific subject typically taken by school students aged 14–16, at a level below A level.

Topic by MukymooD    |  last reply


Can anyone help me with an schematic for dc-dc boost converter,from 3.5-3,7V to 5V to charge a phone? Answered

Hello everyone !! I need a schematic for boost converter but with basics components,i need to find them in my country and not very much to cost. I need it for charge my phone from another cell battery with 3,7V. Like an portable charger. Please help !!

Question by danyelo    |  last reply


Making A Dual USB 3V TO 5V Converter, HELP?

So I was browsing the web and came across this "3V to 5V 1A DC-DC Converter Step Up Boost Module 1PC" and was curious to know if i could attach a "Dual Usb Type A Female PCB Connector Component" to it?  Is this possible,  because I know that the single "Step Up DC DC Converter Boost Module 3V To 5V 1A USB Charger" has one output connector. Therefore if i buy the module without the "USB PCB connector"  will it be able to support a "Dual Usb PCB connector" once I soldered it on?? 3V TO 5V STEP UP MODULE LINK:  http://www.ebay.co.uk/itm/1PC-1A-3V-to-5V-DC-DC-Converter-Step-Up-Boost-New-Module-/301725169466?hash=item464038b73a:g:n94AAOSwQJ5UR2eo DUAL USB FEMALE PCB CONNECTOR LINK: http://www.ebay.co.uk/itm/Desktop-Dual-USB-Type-A-Female-8-Pin-PCB-Male-Connector-10-Pcs-/291502771561?hash=item43deeb4d69:g:uiQAAOSwMmBVj~fc Please let me know if this will be applicable in response! thanks for your time ,RookieSean

Question by RookieSean    |  last reply


AC windturbines in Series to boost input voltage for inverter

I just purchase a VAWT (Vertical Axis Wind Turbine) and an inverter. The wind turbine is rated at 24V AC, however, I see that the rated V AC is requiring quite a lot of wind to produce that Voltage. By mistake, I ordered a grid-tie inverter that starts at 22 V AC and so far I have not been able to reach the startup voltage of the inverter. The inverter is rated 1000W and has AC input 3 phase. It can manage up to 60V AC input.The VAWT is 600W 24 V AC 3 phase.So here my questions: Currently, I don't get any power at all, so how can I modify my setup to make this work. I have a few suggestings that I would love to get some feedback on:Option 1: Buy a second VAWT + two rectifies that convert AC to DC. I should mention that the windmills will stand close to each other and receive more or less the same wind strength, so they should produce fairly the same amount of power. On the DC side, I would put them in series and then I would use a DC to AC converter to get the power back to AC current. The idea is that by doing this I would increase the voltage at least 22 V required by the inverter. I would expect some power loss and probably also voltage, using the rectifier and DC to AC converter. Option 2: Same as option 1, but after the rectifier and connecting in series, buy a new inverter that can handle DC input within the range that the VAWT's produces. (W and Voltage)Option 3: Buy a new Controller that charges a battery and connect an inverter to the battery to send power to the grid. Depended on the solution this solution might require a rectifier.Any comment on these or maybe other options?

Question by percbakk    |  last reply


How do you correctly charge a 12V lead acid battery using a 5V phone charger and step-up converter?

I'm making a bluetooth capable, battery powered portable speaker - I have some 12V lead acid batteries lying round and I want to use those since the amp accepts 12V power. Its important to me that I can use a 5V micro-usb cable as a power supply because they're so common/universal. Everything in my setup works fine except for charging the battery. I've tried two different step up converters. One overheats massively when power in is connected to the 5V supply, and the other is a slightly fancier buck-boost converter which comes with a small LCD which displays voltage and current out - however this one, once connected to the battery, shows a tiny jump in current and then goes down to zero. I'm fairly certain the converters aren't inherently faulty since I've tried running the converter output straight to the amp rather than the battery and then everything seems to work fine.How am I meant to charge this battery? Is there some component I should be adding in somewhere?

Question by CameronCox111    |  last reply


Why is my step up converter not increasing voltage and why output is a little lower than input?

My step up converter is not working ,it wont increase the voltage . I used a multi meter and the output ends up being lower than the input like for example when I connected the battery to it, the battery was at 8.40v and I checked the output and it was 8.10v . I was trying to make a DIY speaker for the first time,  I am new to this.  step up converter  is called a MT3608 LM2577. I got it off of aliexpress.     https://www.aliexpress.com/item/DC-DC-Adjustable-Boost-Module-2A-Boost-Plate-2A-Step-Up-Module-with-MICRO-USB-2V/32668154181.html?spm=2114.13010608.0.0.a2VAYu The battery i used is off a battery pack .it is 8200 mah and 9v

Question by Alex345    |  last reply



MATLAB Simscape Power Systems & Electronic ?

Hello! I need tutoring MATLAB Simscape Power Systems and Electronic. I am working on a project in which I am trying to simulate Photo voltaic panel charging battery with controller ( dc-dc buck-boost converter) with Maximum Power Point Tracker and without it. I need to calculate efficiency for both cases. I have stared part of it with searching online Please, if you can help let me know

Question by skumu    |  last reply


Making Solar USB charger- 5.6V too much for an X-Y:5V step up?

The estimated max my (DIY) panel would have put out was 5.0V, but It's 5.65 in the brightest sun nearly exactly 90° So I wonder is 5.65 outside the input limit for a typical "_ to 5V" step up usb connection? I have learned that if I had a really wide voltage that I would a boost-buck converter to step it up or down depending on the input. I just don't know if I need that here. What happens if you over-volt a step up?

Question by Phoenix17  


How to wind a flyback converter to use with HHO generator?

I have an electrode made of 304 SS that when hooked to a 12V automotive battery draws about 80A. That is WAY too much amps, and I want to boost the output voltage to 36 or more, and reduce the amps as low as possible. I plan to drive the flyback with a square wave generator. What do I need to know to wind my own coil: what core, size of wire for primary and secondary and how many turns of each? Thanks in advance. I've already found that an ignition coil will not work, unless you know of some way to adapt one so that it will.

Question by galveston    |  last reply


BUCK BOOST CONVETER SPECS INPUT 12V-24V AND OUTPUT IS 18V

PLEASE HELPI am building a dc buck boost converter, my feed =back is maintained using a PI-CONTROLLER. The problem is that when am connecting my load which is 13.9ohm(power resistor) its drawing tomuch current and the is a huge voltage drop which is about 11V ,i want to know how to i limit the load from drawing tomuch current

Question by BubeleM  


Why not get high voltage by boosting 300V to say 2KV ?

Hi, I plan to build High Voltage of 4KV. The output current is very low (say 100uA). I intend to use this as focus voltage in a CRT application. Hence, I am exploring the ways to do so. I have seen people building high voltage (8-20KV) using transformer followed by voltage multipliers. Now a days, MOSFETs are available which can withstand voltage upto 4.5KV. So it should be possible to create boost converter which could boost 300V to 2KV. Then one can further boost the voltage using voltage multipliers. The input voltage of 300V is achieved by rectifying the line voltage of 220V/50Hz. Visiting internet, I do not see anybody doing so. Hence I wonder what could be wrong in doing something of this kind. Could somebody elaborate ? Regards, Hardeep

Question by hardeeps    |  last reply


Coilgun, Mosfet problem and joules?

I have two questions: when a mosfet is damaged, it conducts electricity without putting energy to the gate? I have the 75N75 mosfet and I want to use it on the rwilsford07 boost converter, but the mosfet didn't work and I don't know why it conducts energy without putting energy to the gate. I read that the mosfet can be damaged with static electricity, but I use always an anti-static wrap. The formula to get the joules from a coilgun is this?: 0.000005 * C * V * V C= uf V= voltage

Question by Kurt Gerhard    |  last reply


LT3751?

The LT3751 can work with the47N60F mosfet?, Can you recommend me a flyback transformer (in:12v  out:450v)?

Question by Kurt Gerhard  


Raspberry pi Portable: One battery for screen and rasp? How?

I'm trying to make a Portable Raspberry with an old laptop screen. My doubt is if I should rearrange the battery to deliver ~5V to the raspberry and use a boost converter (XL6009E1) to deliver ~9V to the LCD driver, or if I should make the battery pack deliver between 9 and 12V, and power the LCD driver directly, and use the boost converter to step down the voltage to the raspberry. Thanks Guys ;)

Question by Tribalus    |  last reply


Why my capacitor charger melt wires when just plugged from mains? Answered

Recently completed a coilgun with a portable 12vdc supply. it works very fine, but i am not satisfied with it performance it is taking 30 to 40s to charge my capacitor bank of 1350uf at 400vdc. however to boost up the charging i've put a mains supply of 230v.  but whenever i connect it melts my wire at the rectifier. i don't know why but how is it no working here is a shema

Question by ARJOON    |  last reply


How do I raise 3.7 volts to about 5-6 volts?

I have a battery that has an output of 3.7 volts, but that's too little for the project I'm doing. I need about 5-6 volts that I can work with. I'm driving 6 arrays of 2 leds, powered by an IC that I've programmed (for what its worth). I was wondering if there was an amplifier circuit, a step up circuit, a transistor, dc-dc converter, a surface mount Genie I can use to boost the power of my battery. Community, I call for your aid!

Question by Prestond    |  last reply


Can somebody show me a circuit to charge a 16volt 10,000uf Capacitor bank in a relatively short time?

Hi, i have a bank of 16V 10,000uf capacitors that im using to make a battery tab welder.  The problem i have is charging them.  Can somebody show a capacitor charger circuit that can charge these caps in a reletively short time....  60 seconds at the most.  I tried using a camera circuit but the thing to 30 minutes and 37 seconds to charge the capacitors...... i counted....  please help me.  Thank-You.

Question by silencekilla    |  last reply


Converting HP laptop harman/kardon speakers to external speakers?

Hey, I just tore apart an old HP Pavilion zd7000 for the speakers (nicest laptop, nay, compact speakers I have set ears upon) and was wondering how I'd go about hooking them up as an external speaker (3.5mm input) with the option of either battery or wall power. I suppose I'd need the input voltage, a variable resistor for volume, and a switch for power. I'd also need to change the red/black and blue/black wires into an 3.5mm female audio jack (red is left channel, blue is right, and black are ground). Of course, it can't be as simple as that... help me out, please! I apologize for poor photo quality. All I have is this iPod, and the camera's not quite the best in the world. The big black panel is attached to the right channel for resonation reasons, I believe, and the small tube (not seen) on the left is for bass boosting. Update: I've tried hooking them directly to a 3.5mm jack, as user Re-Design suggested (thanks!), but there's a lot of clipping, and it drains my iPod's battery like crazy, so an amp is a must. Would the amplifier out of some old PC speakers work?

Question by orangesrhyme    |  last reply


Inductor Heating Problem Answered

I'm having a bit of trouble with an inductor implemented as part of a boost converter. The circuit works fine except for the inductor gets very hot within a few seconds after turning on. There are also noticeable high pitched noises coming from it associated with varying current loads. I'm not really sure what the issues are as the circuit is within the maximum DC current rating (circuit draws around 120mA, inductor is rated for 250mA) and resonant frequency is also quite low (around 1.5kHz). Datasheet for the inductor I used can be found here. Some help would be appreciated in determining what the problem is and in locating a suitable replacement inductor. Thanks.

Question by andy70707    |  last reply


How to connect an scr to a coilgun?

I make the rwilsford07 boost converter and it charges my capacitor fine, but when I turn on the scr the 6v voltage regulator stop working(7806). What can be happening?

Question by Kurt Gerhard    |  last reply


Help With This Inductor Anybody?

Hey. I'm still learning a lot about electronics, and I'm still very new to that kind of thing, but am trying an electronics project for the Green contest anyway. I did some research on how step-up converters work and finally have settled on a circuit that would work for my project. My problem lies with one of the parts. I needed a 68uH inductor. When I ordered it, the picture below was what I got. This didn't seem quite right. It may be the correct thing, I don't know. So what I'm asking is... A. Is this the part I'm looking for? and B. How would I attach this to the PCB I'm etching for the project. Thanks in advance. My pic was a bit blurry so I found something that looked similar from the internet to go along with it.

Topic by Gjdj3    |  last reply


How to make a lightweight 10kv 500 watt power supply?

I need to convert up to 500 watts of 12 volt to at least 10 kv. It's important that it has both +10kv and -10kv. Right now I'm thinking flyback converter driven by a 555 to 1000 volts then voltage multiplier to 16kv. It's important that it's light so I don't want a regular flyback transformer. I'm wondering how duty cycle effects a transformer. Does it effect it like it would with an inductor-based boost converter? If so, then according to this calculator http://www.ladyada.net/library/diyboostcalc.html I would need an 88% (88% high?) duty cycle to get 12 volts up to 100 volts with a boost converter. Does this mean with a 1-10 transformer I could get 1000 volts from 12 volts with an 88% duty cycle? If so, then I need a light weight 1-10 transformer. I'm thinking winding a toroidal transformer will be best? So I could get a ferrite toroid (I'm thinking material 61, size 114) and wind a 1-10 transformer, but I need to make sure it doesn't saturate. Do I find out the saturation just like I would an inductor in a boost converter? If so, then according to the same calculator, the higher the output current, the less henries I need. So that means if I don't draw enough power it will saturate? I'm probably going to use 25 khz, so according the the calculator, if it's 100 watts then I need a little over a 25 henry primary. But if I use 500 watts, then I only need a little over 5 henries? This doesn't seem right. Soooo according to this toroid winding calculator http://www.66pacific.com/calculators/toroid_calc.aspx with a material 61, size 114 toroid, I would need 2 primary turns if it was drawing a minimum of 100 watts (the lower inductance/higher current can't be right can it?) and then I would need 200 turns. Sooo my question are (haha) is this a good idea for a light weight high power hv power supply, if so are the similarities I'm assuming between boost and flyback converter correct, and if so, how many/how do I figure out how many windings I would need on each side of a toroidal transformer/ how do I figure out what inductance I need for the primary. I have pretty good experience making boost converters but I've never made anything hv. Very long question thank you this is for an ion thruster.   

Question by sk8aseth    |  last reply


How to configure LM317T to deliver 5 amps?

Hi guys, I'm new to the site. I wonder if someone could help me resolve my problem. Well, I'm trying to build a Laptop AC Adapter, but I can't get these components right now: -A Transformer -A voltage regulator other than LM317T and I have no experience with other ICs. So I'm using a DC to DC converter. The input power supply is a Z12 Lexmark printer AC adapter. It gives a DC output current of 830mA under 30 volts (actually it's 37.5 volts, I've checked this with my multimeter). However, the output I would like to get is 4-5 amps under 19.5 volts. I would like to mention that I've already given it a try. But the output current I've got wasn't enough to feed the laptop. I've used an LM317T and adjusted the voltage with a 6.6k resistor and a 47k potentiometer down to 19.5 volts. If there is a way to boost up the current with a joulethief or using a set of transistors or parallels LM317Ts, please tell me. Also, I hope that you give me the part number of all the components to match up with the LM317T because I must use this type of regulator. Thanks for your help and please consider my situation.

Question by junkrecycler    |  last reply


Quadcopter using 12V battery and Wood Screwers

I’m currently attempting to rebuild the quadcopter demonstrated in the link below: https://www.youtube.com/watch?v=qa_x93JQhNM The materials I have are as follows: • SMAKN Buck and Boost Voltage Converter • 20 AWG Flexible 1007 Wire Electric wire 20-Gauge Copper Hook Up Wire • 2300KV 2204 Brushless Motor CW&CCW; • 12V 7 Amp EXP1270 Rechargeable Lead Acid Battery • Carbon Fiber Propeller • Digital Multimeter Attempt 1: We connected a motor to the 12V battery using clamped wire connects – there was a lot of sparking and the motor did not spin. Attempt 2: We connected 2 motors in series – connected the motors and the 12V battery to the buck boost convertor – which resulted in the battery smoking and the buck boost convertor burning out. Can you watch the video and explain to me the wiring aspect to the quadcopter - I believe I may be missing necessary wires such as a female insulated connector that connects to a terminal wire which connects to the 4 motors in series but I’m not sure.

Question by anthnymccld8    |  last reply


Is a toggle switch necessary for this USB Solar Charger? Answered

Hi all! I am a newbie with a simple question. In the instructable below, is the toggle switch necessary or just a design feature? I thought the circuit would only be complete once the USB device is plugged in, acting as the switch so to speak? It is a 6V solar panel to 3 AA rechargeable batteries, then to a DC boosting converter with a 5V USB output. Also, a big thanks to Joshua Zimmerman. Love your instructables! www.instructables.com/id/Solar-USB-Charger-20-21/?ALLSTEPS

Question by Stevemills04    |  last reply