How to make boost converter that will convert 3.8 volts to 5 volts for my android????
Question by PavleP | last reply
I'm trying to make a remote shutter release for my large format lenses. I found a solenoid that will do the trick. It's 12v / 36 ohm push solenoid with 3/8" travel. I prefer to drive this thing with a single AA battery. Is there a simple way to boost 1.5v?
Topic by JonLoder | 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
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 want to boost my bluetooth dongle. On some Instructables there are mentions of getting an exactly correct length. On others the length and shape seem to be arbitrary. If I want to add more antenna to my bluetooth dongle, do I have to make it an exact length or shape?
Question by finfan7 | 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
So, I plugged in the USB to an iPod Mini and the whole cicuit goes blank. I tried it on some person's MINI, but the light shut off right when I switched the switch. HOWEVER, it did work on my iPod Nano and my sister's iPod Mini. It seems like the circuit is shorting out on the MINI and not on the Ipod Nano. I am thinking it is a problem with the noob sauce's MINI, but I do not know why it is shorting out and turning the light out on the charger. Thanks -Brennn10
Topic by Brennn10 | last reply
I bought a FM transmitter for an ipod. I would like to boost the range of the device. (I know it is illegal but would like to get more range than 2 feet.) I think I need to build an external antenna but need to know where to hook it up to the thing. The transmitter I have is a ge FM transmitter for ipod.If anyone has done anything like this or have any useful links it would be great. I don't know anything about circuit making so help would be great on that as well.
Topic by thejrb | last reply
Hi, I need to make a sawtooth generator based on an NE555 (the power supply will be 15 volt - 5000mA), and I need to boost the output signal as follow: http://s21.postimg.org/dwz6aynvb/Sawtooth.png Which needs to go from 9.6 volt to 14.10 volt with a 3000mA current. I've found a schematich, but I don't know if is valid: http://s27.postimg.org/9ptmbsbkz/Signal_Boost.png Would be a viable way, using this schematic, or there would be a better/different solution? If so, someone could suggest me another schematic or tell me how to modify the one which I posted? Thank you.
Question by akopelumenuscu | last reply
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...
Question by Adarsh_tronix | last reply
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
How exactly do I hook this up? Where does ground go? Where does the Vin and Vout go? This is the circuit but we're replacing the 7805 w/ the boost regulator. Thank you!! The pic of the circuit isn't showing up - the circuit goes: Coil /w magnet connected to diode bridge to capacitor to 7805 connected to the cell phone charger. We're replacing the 7805 with the NCP1402 - do you know where it goes? Thank you!
Question by mckywer | last reply
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
Nature News is reporting today on the development of thin flexible sheets of LEDs which could be used for medical diagnostics, or even implanted in the body to use with light-activated drug delivery. Besides these uses (obviously cooked up for the grant proposal :-) ), the clothing and other DIY uses seem fantastic! The interesting thing to me is that these sheets are made with conventional semiconductor LEDs (surface mount) and the flexibility of the leads is handled simply with extra lead lengths to pick up the slack. The original paper is being published in Nature Materials (Kim, R.-H. et al. Nature Mater. doi:10.1038/NMAT2879 (2010).
Topic by kelseymh
To charge a cell phone battery. BUT maximum current is 200 mA. That's not enough current I'm assuming, right? I need a continuous output of 5V but my students are most likely not going to get 5V from a shake charger (neodymium magnets going in and out through a coil of wire) which is why I was going to use a LM7805 but that needs 3 volts more than the output voltage. Any suggestions?? Thank you!
Question by mckywer | last reply
I will need and antenna to boost the reception of my cell
Question | last reply
So I have this idea to put an Ipod into an old CD player case to make the ultimate Ipod Pod. I want to use the Minty boost for battery charging, but I would also like to use a DPDT switch to switch between the DC power of the batteries to AC power of 4.5 volts. I tried to research this and came up with a plan, but I'm not sure if this would work.
Topic by fresh1 | last reply
Hi. I am a student who yearly participates in a solar boat regatta, and is wondering how he can boost his panel's rate of energy... collection. I have thought of trying reflectors, and am wondering if this would work. anyone know, or have a better idea?
Topic by DELETED_craz meanman | last reply
I need to power two stepper motors off of 7.4VDC, and am trying to figure out the best, most cost efficient way. What type of DC booster circuit would be best for this application? Do I need any noise filter? If yes, what kind? If I understand correctly, Stepper motors need a constant current. Does this limit my selection of DC boosters/step up devices?
Question by RocketPenguin | last reply
Until just a few years ago, doctors believed that the brain stopped making new neural connections - meaning that the memory began to get irreversibly worse - when the body stopped developing, usually in the early 20s. And doctors knew that, like any other part of the body, neurons weaken as people age. Loss of brain function due to neural breakdown was assumed to be a normal, unavoidable part of aging. It turns out they were wrong.In the past few years, it has become clear that you can, in fact, make new neurons starting in your 20s and continuing well into old age. You can literally rewire the brain with new parts as the older parts wear out. How?There are lots of things you can do right now to preserve, protect and enhance your gray matter.14 Ways to Boost Brain Power
Topic by Keith-Kid | last reply
Hey everyone. Recently I went to The reject store (like a dollar store where things an cost over a dollar) and saw some garden lights selling for $2 each. I bought 4 of them. :D they come with one AAA battery each with 1.2V could I Purchase a mintyboost and modify the lights so they each charge up a set of four AAA batteries, with can detach and be used to charge USB device with the internal battery storage that was charged by the solar panels, or would it have to be 2 AA's? Thanks for the help! :D
Topic by Felixninja | last reply
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
I have a 20 year old van. The a/c leaked and it is much cheaper to buy a 120v window unit ($140 with a 3-year walk-in exchange warranty) than to pay a shop to rebuilt the vehicle a/c. I chose a 5k BTU window unit that uses 4.1 amps running, and have a 1k watt sine wave inverter. Alone, the inverter will not start the a/c unit, but will power the fan. I confirmed a trick to start motors with an inverter. I connected an 8" bench grinder to the inverter and started it. It took a few restarts to get it up to speed. Then I started the a/c and it ran without problems. The bench grinder motor was able to supply the reactive power the a/c compressor needed to start. Both continued to run without straining the van's alternator. BUT, I don't want to travel with a running bench grinder going, that's not safe. Is there another way to supply the reactive boost that is safe to travel with? Once I get a simple stable way to run the a/c I'll work on a mount to vent the hot side. The van has sliding windows.
Topic by DavidN71
Hi all, Here I have a small and simple FM transmitter based on a simple transistor oscillator, however, due its simplicity, is weak for my needs: I need to transmit the signal to a distance of about 33 feet. Notice that I will use the transmitter in a rural location and around the building there are no other houses, so I will avoid the risk to cause interferences to other people. Well, so I was thinking to implement an amplification stage, after the transmitter, and I ended up with the following schematic: http://s23.postimg.org/5o8kycjrv/Oscillator_and_Amplifier.png On the base of Q1 I have a female jack where i get the audio signal from an MP3 player. However I have some doubts about resistors values for the amp stage: these values seems too much great to me: I get the Transistor values (BFR36) from the datasheet: http://www15.zippyshare.com/d/nmSyQm6e/625003/BFR36.pdf and I calculated the values here http://www.vk2zay.net/calculators/transistors/bjtBiasing.php (choosing "desing given emitter voltage") The power supply, as shown in the schematic will be equal to 12 V DC. But as I've said I'm not very convinced of resistors values for the amp stage, which seems too much greats. On the other hand, due to the fact that the amp stage is an emitter follower, it will just amplify the current and not the voltage: would be able to give a decent boost on the signal output? What I can expect? Thanks.
Question by akopelumenuscu | 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
Will i get more charging hours by using them?what is the maximum number of D cell batteries i can use in series to power a minty boost circuit?or how much input voltage can i give to a minty boost circuit?
Question by imakethings | last reply
How can I boost my broadband access from my usb modem? I am about 2 mi from nearest cell tower and I'm getting about 2 bars of national access to about 2 bars of broadband access (slow to medium speed). When I am in town by towers I get full 4 bars of broadband, (speed is phenomenal!) Is there anyway to boost my signal from home? Can I "ghetto" rig an antenna wire from usb modem antenna to the tv antenna on top of house? Any help appreciated... I have the USB720 modem from Verizon, and a new Dell Inspiron 1520 loaded with Windows Vista. Attached is modem specs from Verizon wireless. Thanx, The Revelator P.S. Hardline/fiber optics is not an option here, only cell phone access at house.
Topic by revelator | last reply
How to boost the wifi range of a nintendo ds?
Question by treinengek | last reply
Okay, here's the question/challenge... I'm using an AD9850 signal generator IC to create various frequencies which works great. Input voltage is 5-volts. However the output is only around .5-volts. What I need is to be able to boost that to (ideally) around 45-volts without affecting the frequency created. The ultimate amperage I am working with is only 20-600 microamps so the boost shouldn't be a problem (I think). I've independently used voltage boosters but wonder if those affect the frequency. Then from there I want to make the current biphasic (reversing polarity every 3-5 seconds) so I'm assuming a relay somewhere at this end. What say the resident experts here?
Question by pletchman | last reply
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
So im thinking of making a Mintyboost for my ipod/android phone however I'd like to make it into more of a Megaboost. I wanna build it inside of an old Army ammo case and add multiple usb ports, with a much larger capacity battery(s) So my question is can i add the extra batteries in parallel and have them still recharge and operate the same way? Same scenario with the other usb ports?
Question by Douglerful | last reply
So folks I think I'm gonna give the water-into-OxyHydrogen-into-fuel booster gag a try. There's a couple of shady ibles on the subject, so I wanted a little more professional input. I'd like to go about this all scientific like so my questions kinda boil down to:Measure / calculate the amount of air used by my car in one second (in volume)What's the best catalyst to useMeasure the amount of hydrogen and oxygen produced in one second (in volume)Accurately measure fuel efficiencyI met a chap who did it to his car, I'll try to wrangle some out of him. Bit of an interesting blighter, 50-60ish black chap with dreadlocks from Gloucester.I'll be giving it a try in a less then optimal test vehicle however. Carburated '94 Buick Century, V6. I'm sure the idea would "theoretically" work better in a smaller engine. If this system works at all (upwards of 10% increase in efficiency), I'll make an improved version and iblify it. The car will be used on primarily the same route, a good mix of highway and 40 ish speeds, and I'll leave the air conditioner off full time so's not to get false readings.Any input plz? I'll post some pics of my brave victim car later.
Topic by KentsOkay | last reply
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
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
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
"home" amplifiers are relatively easy to find. A simililar amp can be built from available (velleman) kits, or from discrete components. But for portable use (on the bicycle, or car) , with one, or max. two 12 V batteries, only ready made car amps are available. The only thing between the choice of using stuff I already have or buying car sound system components is the power required... Which would mean there is a circuit inside the car amplifier boosting the battery voltage... Can anyone suggest a simple circuit or easily available gadget to boost the 12 V car battery voltage to the required +- 9 up to +- 40 V required for the variation of designs available. I am thinking of using (X2) the 200 W Velleman kit (+- 30 V) or the TDA 7294 chip (+- 40 V) for my bike amp, but would also like to know how to boost to arbitrary values (like, 17, or +- 21V) (for understanding). Of course, not just voltage, but also power is needed here!
Question by BobS | last reply
Can i plug the minty boost in to my laptop to recharge the batteries or do i have to put new batteries in every time. if not how do you make it usb rechargeable?
Question | last reply
I really want better wifi and I don't want to go out and buy something. I want to make it with house hold items or an overall price of $5 or less.
Question by iLove Apple | last reply
Output should be within acceptable voltages of a 5V/1A regulator. What would the schematic look like?
Question by freezeface | last reply
Hello, I want to ask about your opinions about my websites forum (not mine per say but my good friends), http://yowee.netai.net My friend, the admin, hydronator, is considering taking the site down because we dont get much traffic, and no-one other than a few of the members of the old forum which crashed, have joined the new forum. I want to know, what could be done to improve the site, and also, what would be a better way to describe the forum, other than "fun weapons designing ", since that doesnt exactly sound right, at yowee i and a few others design things that might be considered weapons, like potato launchers or pen catapults , things that you wouldnt call toy weapons. anyway, we need a positive way to describe what we do, as well as ways to attract more traffic, or else hydronator is going to shut down the site :( because he is depressed, and is being rather negative in turn of recent events. Basically what yowee is, or what it was originally was " a community of friends having fun conspiring against society and plotting fun ways to have fun ,prank and be a nuisance" somewhat like anarchist community in many ways, except completely different, not being anarchists and all. Its hard to describe, which is one of the reason ide like to ask for help!
Topic by oldmanbeefjerky