Can I have the circuit for the 5 volts cfl lamp ballast. Please! Thanks.
Topic by remyjovero | last reply
I have a fixed input and the output is 5 volts. What type of design must I create to increase my output voltage to 9 volts with the already given output of 5 volts? I am trying to make this charger project as small in size as possible. Any assistance with this would be great. Thank you all!
Question by fr3dd4 | last reply
How to build the circuit that is in those devices that plug into 120 volt receptacle and can have a usb charger cable plugged into it. I just need the circuit diagram. I am a little familiar with schematic reading. It all fits in that little plug in device, so it can't be that much, right?. Thanks.
Question by stevecinstrfme | last reply
Greetings all. I suspect this is a pretty remedial question but I've not been able to find help or instructions online...so here I am. Basically I want to build my own 12V to 1.5V converter to power a small electronic device in may car that is currently chewing through a lot of batteries. Such converters are cheaply available online but what would the fun of buying one be, if I could make my own instead?! Can anyone help me get started by pointing me to an online resource with information on how to make such a device? Many thanks
Topic by mcbenney | last reply
My students are building a shake cell phone charger and I know there's going to be a lot of current (hopefully) and voltage making it's way to the 7805. I don't want anything to be lost as heat, so does the 5 volt regulator need a heat sink?? Thank you so much!!!
Question by mckywer | last reply
Hey friends! I have a question. I want to be able to use 4 AAA batteries (6v) to power an IC. The IC's max voltage is 5.5. Is there any kind of way I can use two resistors as a voltage divider to lower the voltage 1 volt or should I just use a diode(which would lower it by 1.4v)? Thanks!
Topic by HavocRC | last reply
I have a small r/c tank that is 6 volts .the problem with it is it is made to take CR123A 3 volt camera batteries .which run about 5-7 dollars each .i could by rechargeable ones for 50 but i thought it would be easier and more cost effective to convert it to run on a nine volt rather then four AA or AAA .not just do to the cost but also because the space limitations i know how to solder and built circuits if i have a schematic provided .so could anyone provide me with a small circuit schematic or is it just in need or putting a resistor in between the terminals?
Question by somebullcrap | last reply
Ok,so I get a 3 volt signal from a detector and use this 3 volt to trigger an alarm which atleast need a decent 7 volts to function.The detector could take a max. of 5 volts input which I got from the 7 volts DC supply.This 5 volts fed,gets transformed into 3 volts after the detection.So let me make this clear,I have a 3 volt and a 7 volt supply.I need to use this 3 volt to trigger the 7 volt circuit.I know what you are thinking-a relay !right?but I couldn't get a 3 volt relay anywhere(though I got a 5 volt relay).I can tackle this situation in two ways.1)Either by stepping this 3 volt to 5 volts and making the relay do the job.but how? 2)Or some circuit to use this 3 volt to trigger the 7 volts(like a relay but maybe by using ic's).This is the final part of my project and so please help me.
Question by Adarsh_tronix | last reply
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
We have a several pair of carbon fibers pads, but what happens now all of them have a USB plugs that don;t fit with the receptive Jack Plug in 5 Volts Battery This batteries with the pads work to heat blanquet. We need help, or more than this a teacher! who tell us how to take out these USB plugs, how to join their cbables, and the how to add a plug in 5 Volts Jack. If is not clear please let me know Maria
Topic by Maria SoledadD | last reply
I have a set of walky-talkies, and they have horrible battery life, so I was planing to use them as intercoms, one getting power from my usb port, one getting power from an mutilated cellphone charger (both 5 volts). my Walky-talkies are meant to use 3 AAA batteries. (4.5 volts). is this setup possible, or will it ruin my walky-talkies?
Question by leggomylegoeggo | last reply
UL Solar has 12 volt 5 watt solar panels for $19.99. I bought a couple of these about 2 years ago. The price has not been this low since then. http://www.ul-solar.com/5_Watt_12_Volt_multicrystalline_solar_panel_p/stp005p.htm Luxstar is not affiliated with UL Solar.
Topic by luxstar | last reply
Hi all! Whats the best way to get a nice circuit friendly 5 volts from 4xAA batteries? Measuring some brand new AAs, they're about 1.6v when new, which drops under load, I know. So four AAs of course add up to 6.4v, possibly blowing my low current circuit. And isn't a 7805 voltage regulator only good with aroundabouts 7-8 volts source because of how they work? Plus DC-DC converters are expensive, and resistors are wasteful. :-) Thanks!
Question by Heliosphan | last reply
Even if I have to open it up can I run this on 5v using a buck converter or by modding the screen? The screen is a RCA DRC69702 that came with a dvd player and all I want to is power it freom a two port battery. one port will be hooked up to the monitor and one to the raspberry pi.
Question by nerd7473 | last reply
Hi, I have to DC device a) works with 5.V (b) 1.5 Volt... I am using mobile charger as a power supply. How can i connect them with one mobile charger....as the charger output is 5.V only. a) works fine but as the other device require 1.5 Volts . Which type of power component should i use to supply additional appox. 1.5 Volts ? will any of these can device blast ? Any type of tips n tricks will be very help full. Thanks, Richi
Topic by RichiV | last reply
Can I charge my psp with 6 volts (aka 4xaa) ? even though its only supposed to have 5v....Or do I have to go to the source ( what used to be radio shack in Canada ) and find a regulator. If so what little digits should be on it ? and would any of the following regulators work ? AN6541 IRL3103 ( I already have them I ripped them of of old mobos) To explain I lost my wall charger and usb charge don't work unless its on..... and the battery is dead
Topic by littlechef37 | last reply
How can I use a 6 Volt power source to power a 5 Volt USB port and a 1 Volt LED? I know I need a regulated voltage for USB, but how can I get the remaining power to go to the LED?
Question by Validis | last reply
I have some older, but nice yamaha computer speakers. there is an external transformer, and it says the out put is 14v dc, 800 mA. I am wanting to skip the transformer, and us a 12 volt sealed led acid battery battery to power them, placing it after the transformer. I would prefer to use the 12v battery as a 12v 5 ah battery is around 25-35 dollars, and a 14.4v 2ah battery is around 70 dollars. Would this do any damage to the amplifier circuit within ? What effects would this have on the sound quality of the speakers? Would I be able to be switch from 12v dc, skipping the transformer, and plugged into the wall using the tranformer if i wired it to be able to do so, and would that have any long term effects on the speaker?
Question by codycool55 | last reply
I need to know if a 240 volt ac squirrel cage fan motor can be safely run on 120 volts ac. An quick internet search reveals several sources that all say no, but I am concerned that the people answering the question don't know what they are talking about - as is often the case on the internet. I know there are a lot of want-to-be engineers out there ready to answer any question posed even when they have no experience or knowledge of the issue. Please do not guess at this or offer some unsubstantiated opinion. I need a real answer to this question. Here is what I do know about this issue from researching a couple of electrical engineering sites. Lowering the motor input voltage by 50 % does several things. 1) The motor will run slower. 2) The torque developed will drop to about 25% of its full voltage rating. 3) This decrease in torque can make the motor stall when trying to start under a heavy load. 4) There may be drastic speed fluctuations due to load variations. 5) The motor current will double if the load remains constant. I can understand how these issues could cause severe problems in some applications, but perhaps not in the application I am looking at. I want to use a squirrel cage motor rated at 1/20 HP, 240 volts, 0.5 amp in a direct drive fan application. Here is how I am looking at this issue: - I need to reduce the fan speed so the speed reduction is a good thing in my application. - I have test run the motor on 120 volts for about an hour and there is plenty of torque to operate the fan. I figure at the lower speed there is less air load on the fan blades so less torque is required. Again a good thing for this application. The is no heavy load at start up and the motor seems to have plenty of starting torque for the fan. The fan does not reach full speed as fast as it does on 240 volts, but it still does so in about 4 to 5 seconds so this shouldn't be an issue either. Since it is a fan moving air and not some machine moving gears and levers the load is constant so the speed does not fluctuate at all. Again this should not be a problem. The possibility of the motor current increasing is my only concern so far and apparently it is not an issue since a test run showed the current decreased from 0.5 amps at 240 volts to 0.4 amps at 120 volts.That is a significant current drop instead of the predicted increase. Since this is a fan, I think the current decreases because the load decreases with the lower speed. For these reasons and based on my apparently successful test run I think the motor will operate fine on the decreased voltage. However, I am not sure how to factor the motor slip into this. Slip is the difference between the synchronous and asynchronous speed of an induction motor. From what I have read the slip will increase dramatically when the voltage is cut in half, but I am not sure what physical affect that will have on the motor. If you know what effect that will have or know of some other factor I am not catching please let me know.
Topic by biochemtronics | 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 need my car to go from 12 volts to 3 volts for LEDs... please help me!
Question by led235 | last reply
How to convert 12volts 7 ah to 5 v 1ah 12 volts can be connected to 7805 for converting into 5 volts but how to convert current. current could be limited through resistor but which? also give formula of how to found it out
Question by yhdesai | last reply
I purchased a 6 volt output solar panel from radio shack and I need to get it to 5 volt. I have a large assorted pack of resistors but I am fairly new to what is what.
Question by jeoncs | last reply
Looking to power my iphone off a 6volt input. Want the best way to provide 5volts at no more that 1amp no less that 350ma? Any clean simple methods for a novice? Want decent current control and cleanest path possible.
Question by chfrank60 | last reply
I am going to run a 10 volt filament on the +5 volt and +5 volt to get a combined power of 10 volts. First of all will running the filament on dc hurt it? Also the tube takes 10 amps, so will the +5 and +5 power supply be able to cope with it? ( it is a atx power supply) also how do you wire 2 +5 volt wires with a common ground to get 10 volts
Question by electricfan | last reply
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
I was wondering if for example, putting a 1.5 volt battery in a 9 volt circuit, but in reverse would act as a resistor and take the 9v down to 7.5 volts? I am too scared to try it, and just wanted to know if it has been tried before.
Question by fundash | last reply
Let me preface by saying I can do a lot of things myself but have no training in electronics. If someone can give me a diagram and values for the components I can construct it. I have 5 LED lights which each run off of 3 AAA batteries (3.6 volts). I would like to take the LED arrays out of all of these and make them into one big light that I could run off the 18 volt batteries from my power tools. Can I just wire all the lights in series or would I need some regulator circuit to prevent them from burning out?
Question by etcmn | last reply
So I am making an electronic t-shirt with a very bright screen that gobbles up amps. At it's probable peak usage it will be using 9 amps (or 8.697, but I always feel safer sizable margin of error). Luckily this will only be at its peak for a few seconds (at most 10 seconds, probably less) when it starts up. Next it will use between 4.5 to 3 amps continuously, and later will be using closer to 1 amp. All of this is at 5 volts, and I will be stepping down from 7.4 volts. As if this wasn't hard enough this is battery powered, so good efficiency would be nice. I want to minimize the amount of power lost. Is there a power supply that can do all this and still be wearable? In short, I need a wearable 5 volt power supply that can provide a few seconds of 9 amps and 4.5 amps continuously. Thanks! Edit: Thanks Everybody! For people who find this in the future, here’s from saving you from having to read through all the posts… In the end I found the answer to my problems was cutting the peak amps it needed to consume it half, bringing it down to around 5 amps. What I ended up choosing was the R-745.0P power supply. Look at the last page of the datasheet for clarification on how to wire it, and when it comes. The mpilchfamily thread talks about safety, which is important and worth reading if you want to know about it. I wasn't sure on whether or not I should go with the R-745.0P and all the supporting components or the UBEC 2-5S, which is an all in one package. I chose the R-745.0P but it’s up to you!
Question by GenAap | last reply
The 2 1.2V bateries are in series. Will they explode? Will they glow? Will they recreate the big bang?
Question by kaboom! | last reply
Hey, i lost a special 10 pin mini usb cable for my camera so i cant charge it any more so i was looking for information to make one, so i need to convert 5 volt to 3.7 volt so i can hook up the battary for charging can any one halp me with this ??? greetzz willem
Topic by BAKSTEEN | last reply
I need to use a resistor (not a voltage regulator, sorry) to drop 9 volts from a battery down to 4.5 or 5. I am running an attiny85, which is also used to power up to 3 30ma leds. What do I need to use?
Question by XOIIO | last reply
I got a 19.2 volt battery tool kit without the charger,and i have a 25 volt 2 amp transformer (110 volt input) im not using and i want to use it to charge the batterys if its possible. ive read online that 2 amps is not a problem but it needs to be the same volts and i have no idea how to knock off 5 or 6 volts i would apreciate any help.
Question | last reply
I'm trying to connect 8 3.2 volt Blue LED's to a 5 volt power source for a cube lamp I am making. I've done this a few years back but with red LED's and didn't really know what i was doing. But I just found out that Blue LED's need more power to light up. I have them soldered together in a parallel configuration that i found on instructables https://www.instructables.com/id/LEDs-for-Beginners/step8/Wiring-up-multiple-LEDs-in-parallel/ but i dont know what resistor to use for them. One website says to connect a 100-ohm resistor to each LED and another says to connect a 10-Ohm to one end. I apologize ahead of time because i'm not very knowledgeable in electronics so if its not too much trouble, could you put it into simple terms. Thank you so much for your time!
Question by wolfsheim_lvr1 | last reply
I've seen a great deal of portable breadboard PSU's that output 5 volts from a 9 volt battery, and I find these fantastic! However, I was curious...is there any way to refine this futher down to get a steady 3.3 volts? I would like it to be something close to the system that sath02 has made here as it not only better suites my nees, but makes sense to me. Thanks in advance!
Question by DoctorWoo | last reply
I guess I could sell them. But what would someone do with them?
Question by keydogstony | last reply
I wired up my bicycle with a 12 volt battery. The problem is, I have a Cree MC-E led which requires between 5 and 10 volts with a buckpuck. One person suggested resistors to drop twelve volts to nine but that would waste too much electricity. Is there a simple way to cut the voltage in half to six volts which would not loose power in the conversion process. Cutting the power to 6 volts would be best because there are devices aside from the light requiring 6 volts which I want to install.
Question by Noblenutria | last reply
I am interested in a circuit to interface an RS232 to a special 12 volt ONE-WIRE circuit. It is special because it is an controller used in industry. So I have a MAX3232 to convert my Arduino to RS232 levels, but that will get me to 2 wires. I need to be able to make that into a ONE-Wire at 12 volt levels (not 3-5 etc) . I see the MAXIM circuit (attached) for converting to one-wire at lower levels, but can't find anything to utilize a 12 volt one-wire level. Hope I am being clear and thanks for your assistance.
Topic by appliancer | last reply
I am wondering how to create an analog (NOT digital) sine wave from 0 - +5 volts (Not -5 - +5). If you could, post a schematics diagram, or send a link to a page with the schematics. It has to have a variable pitch. Thanks, josh1324
Question by josh1324 | last reply
What size fuse would I use for a 12 volt 5 amp/hour sla battery. Better yet, are there breakers for same battery. I am wiring an electrical system for a bike. As the complexity increases I accidently short the battery more often.
Question by Noblenutria | last reply