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
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 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
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
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
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
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
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
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. First time question-poser. I need really basic information (no freaky-tech-talk, please). How do I summarize? Dial-up, broadband through cell phone provider, DSL ( although discovered our location is too far out), and now satellite internet through Hughesnet. Iffy at best. Here is my dilemma: I need to boost the satellite internet signal for my laptop that will be located in my new handy-dandy office (when it is finallly constructed: a month or so) on the back of the property? Haven't measured the distance but more than a hop, skip, and jump. More like 100 hops, skips, and jumps. May have old Dish dish as was a suggestion on a page that I can't get back to now that I am officially a member, thank you very much. I know way more about this internet thing than I want and not enough to help my situation. Any suggestions would be greatly appreciated.
Question by mimsk | 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
Hello! I'm new here. I would like some assistance in designing a digital LED display vacuum/boost gauge with both a linear LED display as well as two seven-segment display modules. I plan to use a standard automotive MAP sensor to provide the -30Hg to +30psi signal. What I envision is having the two seven-segment displays sit next to a row of 28 green LEDs for vacuum to -28Hg, 7 yellow LEDs for pressure from +1psi to +7psi, and 8 red LEDs for pressure from 8psi to +15psi that light up incrementally as the pressure increases or vacuum increases from a center point of zero (clear LED always on). The problem is that I have absolutely NO idea of where to start other than the layout of the LEDs. So any help would be appreciated. Thanks! Skullmaster20 (Chris) Edit ----- This is a drawing of what I'm trying to create, and a picture of what I'm going to replace.
Question by skullmaster20 | last reply
Planning on a trip to Northern Maine, and I do not think "hotspots" will be crawling out of the woods. Ok, I'll cut the cliches. Within reason $$ wise, what can I do? directional boost? Thanks i am sure this is a no brainer for a brainer. Had to. Chas
Question by Charllenger | last reply
Just gota new netbook (Advent 4213) that has built in HSDPA (ie, a sim card slot for mobile internet). My problem is that where I work there is a very weak signal - I've looked at a couple of antennas, but there's no socket in the netbook to plug one in! The inbuilt antenna is on the bottom. Can anyone recommend a way to non-permanently attatch something, like velcro, etc, to boost the signal? It's just info on what sort of connection I could use. Thanks in advance!
Question by Coz_UK | last reply
I have a linksys Wireless N router which doesnt seem to have the power needed to reach all corners of my house... It also has no antennas (and i don't have money at all so a wifi usb thing isnt an option) so none of the guides here about wifi boosting dont really work. So i had an idea about how to fix this but had no idea how to implement it.... Here's my idea: build some sort of relay station to extend the range R=router @=relay L=Laptop )=signal R) ) ) ) ) ) ) ) ) ) ) ) ) ) @ ) ) ) ) ) ) ) ) ) ) ) ) L Is this possible? I have an old linksys router with two antennas if that helps
Question by quellek2 | last reply
How to boost the wifi range of a nintendo ds?
Question by treinengek | last reply
I will need and antenna to boost the reception of my cell
Question | last reply
I have torroids from pc power supply units, loads of transistors, 555s, uControllers, diodes, caps... all sorts of stuff.
Question by yaly | last reply
That way I will have an antenna thats 50metres long
Question | last reply
Hi all, I just bought the Smartlab: You Build It - Rock Star Microphone toy from a Goodwill. It's a great toy; it has a microphone that let's me transmit my voice over the radio (perfect for a Halloween haunted house when the static-mad radio bursts to life with terrifying voice-overs!!!:) works but only up to about a six foot range. I would like to be in a different room and use the microphone but I need to boost the range considerably - I understand that the FCC has rules about this. Moving forward, I don't know how to do this (at all....). Are there commercial range boosters that I can use? Are there mods that someone can recommend? Are these toys designed to NOT transmit beyond six feet even with mods? I wish I could give more information about the tech specs of the toy but I will have to try to de-solder the metal plate covering the circuit board (plus I don't know what specs to look for yet). Advice appreciated, DAZU
Topic by damianzuch | last reply
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
The best i can figure, the current coming through toroid turns on the transistor, then the collector drains the current to the negative, while pulling it from the emiter back through the diode to the collector? if i am correct, how would this boost the voltage?
Question by revelae | last reply
Using a transistor to boost the output from a quartz clock to drive a larger motor in steps. Is the idea sound what would I need? Having read a couple of instructables on equitorial drives, I found myself wondering why you couldn't just use a quartz clock movement to drive one? They don't produce much torque is the answer to that one. Why not? I took one appart to find out. The gear chain is very flimsy moulded polyethylene, or maybe nylon. the power comes from a tiny armature that makes 1 turn a second in 2 pulses the magnetic pulses are provided by a little cuircit board with the quartz ossilator on it. Here endeth my actual knowledge. My knowledge of electronics is minimal give me a good set of instructions and I can build it (unless its a joule thief but thats a different matter) but don't ask me how it works. My limited understanding of a transistor is if you put a small current or voltage across 2 pins you can get a bigger current or voltage to flow across one of them and the third, something like a relay. I was thinking if I took the out put from the quartz cuircuit that provides the magnetic pulses and used it to trigger a transistor to pulse a higher voltage and current through a small 3 pole motor kicking it around 1 pole per pulse. The motor I have a salvaged and rebuilt in an earlier instructable runs on 3V and draws 0.2A when not under load. the largest motor I have to hand is a big 7 pole one designed to power model planes or cars draws up to 15A on 7.2V the timer cuircuit for that one needed 3 Mosfet's in parralle so I'm guessing thats not possible.
Topic by Stan1y
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