USB Driver

I got a USB cable fro the dollar store today for, well, one dollar. I was wondering if there was a way I could control the voltage output from my computer. I stripped the cable (it was male to male), and tested the output with my multimeter, too. I am getting about 5vdc, is that normal? I thought I got more out of the USB port. Like I said, I was wondering about any opensource usb control program I could use to control the USB voltage. Is this even possible? Also, I can't program AT ALL, or understand it, either.(if it matters)

Posted by John Smith 11 years ago  |  last reply 11 years ago


XP Drivers

I bought a Compaq Presario F700 Notebook PC but it came with vista. i gave it a try but did not like it. so i bought windows xp PRO i installed and there wasn't any problems. but i need some drivers which i could not find. if you can help me please do so. in the picture you can see that i am missing some drivers but i cant seem to find them if you need more information please feel free to contact me.

Posted by chrischavez 10 years ago  |  last reply 10 years ago


speaker drivers

I'm looking for speaker drivers within 40mm-50mm and a full range frequency response of about 0-25khz But! i cant find any manufacturers within the uk at a cheap price or decent frequency range btw its for a headphone project im working on :D All help greatly appreciated (:

Posted by 00mike000 9 years ago  |  last reply 9 years ago


LED driver.

i want to make a LED light source, I have found a few on other places, but not sure of those. I have a 9v battery, 4LEDS.  If anyone would be so kind, I have two set ups I am considering. One will have a 555timer, to make the LEDS "pulse"    The other is just direct connect battery to LED i am aware a resisitor or several are needed for this direct arrainagement, so my question for this setup is how to make the most of it. a third option is to incorporate the two above.  *did find an instructable which used a wall plug as the driver, with some modification of course. thanks in advance.

Posted by mossDboss 8 years ago  |  last reply 8 years ago


Scanner Lamp driver...

Could some please tell me what is the output of a scanner's lamp driver. and can i make something cool out of it beside turning any lamps with it!?

Asked by kk khrab 7 years ago


led driver automotive

Can I power an AC LED driver with DC voltage, from what I understand the driver controls voltage and current. I purchase an LED light 7 x 1watt , the driver was rated 85 - 265 volt ac input but the seller had written 12 volt DC with grease pen across the printed label. This light works fine so I ordered 7 more like it with same ratings from a differant seller and they only work on 115 - 230 volt. Now I need to find proper driver or ship back to Hong Kong( Grrrr) I have seen drivers rated at 12 volt AC, will these work on 12 volt DC voltage? Thank you in advance, Duncan. 

Posted by dsr. 6 years ago


Need help with this driver? Answered

Hi, I have 3 blue  x 1w high power leds, specs are: Forward voltage: 3.2v - 3.6v Forward current: 350mA Intensity: 70-80Lm Color temp: 6000k to 6500k I have this led driver but want to know if it will drive the 3 led lights at each 320mA or total 320mA divided x 3 Driver specs: LED power supply driver Power: 3 x 1W Input voltage: 80-265V/ 50-60Hz Output: DC2.5-12V/320mA

Asked by Lion_Heart 6 years ago  |  last reply 6 years ago


Power Supply and Driver? Answered

I've seen alot of the projects that have a power supply and a driver?  What's the difference between the two and why would you need both?

Asked by lford4 6 years ago  |  last reply 6 years ago


help led driver?

Ok so i have 3 leds in series but in total i have 4 sets of these. the ma is 20 and the volts is 3.4 or 3.6 on the led and i want to run it at 12 volts with 6800ma. what i want to do is build a driver to regulate them so they wont burn out fast. so i want to know how to build one and what i need.

Asked by diabloboy 7 years ago  |  last reply 7 years ago


LED AC Driver

Hello, I was looking at making some indoor lighting using these leds http://www.ledsupply.com/creexml-ww220.php  Of course, the only part I'm confused on is what kind of driver or circuit should I use, if I wanted to plug it into a 110v plug? Thanks

Posted by opliko 6 years ago  |  last reply 6 years ago


2n3055 flyback driver? Answered

Is there a better transistor to use instead of the 2n3055 because those things break easily and are somewhat expensive. 

Asked by Jimmy Proton 8 years ago  |  last reply 8 years ago


My LED Driver? Answered

Right so i asked about how i could dim this circuit but i forgot to put a link of the circuit in question . i wanted to know how i can control dimming of an LED. i have 3 LEDs into one LED RGB they use 350 MAh 3.7 V each and i used 1W 3.9 ohms resistor on each Vreg. they have + as the Common.   is it possible to just put a potentiometer between the driver and the battery?  or do i need to a high tech micro controller?  https://www.instructables.com/id/Super-simple-high-power-LED-driver/

Asked by unaffiliatedperson 8 years ago  |  last reply 8 years ago


Led driver help.

I want to make a aquarium light unit with 100 cool white 14000k 3w ,DC Forward Voltage 3.4-3.6V ,Forward Current 700mA and 100 Royal Blue DC Forward Voltage: 3.6V - 4.0V  ,Forward Current: 700mA  i want 2 dimmers 1 for whites 1 for the blues, can someone please tell me what divers i need  and how many i need. if imposable links to the driver on ebay.

Asked by awilloughby3 6 years ago  |  last reply 6 years ago


Small led driver?

I need a chip that will be able to power  5 or more LEDs not past like 10 though cause it's not necessary channels of LEDs ,I want to be able to have each channel doing different patterns at the same time, blinking ,fading ,or just on.  (it doesn't matter how much MA the chip can handle as I will be using transistors to amplify the signal ,most likely) It needs to be able to fit in a 1/2 inch tube. I think this one will work but im not sure. http://www.onsemi.com/PowerSolutions/product.do?id=NCP1840 I think this will only work on printed PCBs if I can i'd rather have something i can wire up with ether perfboard or wires. 

Asked by the_burrito_master 6 years ago  |  last reply 6 years ago


Alarm Buzzer Driver? Answered

So I have removed a buzzer from an out of date smoke for fun use, but it doesn't work as expected.  I set up a driver circuit with a 555 and some resistors/capacitors.  I don't deal much with IC's or the 555 and haven't really bothered to learn to use them properly, but I took an LED flash circuit and vastly decreased the capacitance, upping the frequency drastically.  I have included an image of the circuit.  The 555 runs on 6 volts, the buzzer runs on 9 (the blue wires).  The volume was ok, but nowhere near expected levels and I wondered if it had to do with the higher than normal frequency.  I attached it to an arduino and ran the tone function from below audible to above it (whole frequency range) and the sound was very quiet, even using an npn transistor and 9 volts right off the battery hitting the buzzer.  As you can see, the buzzer has 3 leads, i only used two, but as with most 3 poll buzzers I assumed one was just for some form of feedback.  Any voltage in any direction across the three produces sound, so should I use all three, and if so how should I do so.  How would you recommend driving this buzzer?

Asked by jj.inc 5 years ago  |  last reply 5 years ago


4-DCMotor Driver?

Please help me to connect 4-DC-Motor-Driver-Module to arduino thank you

Asked by alisoud 1 year ago  |  last reply 1 year ago


2N3055 Flyback driver

2N3055 Flyback driver really need resistor to work?

Asked by james34602 6 years ago  |  last reply 6 years ago


3W LED driver?

3W LEd driver with 9V dc and 350 mA output runs on ac mains supply.

Asked by gaurravi11 4 years ago  |  last reply 4 years ago


Will this FlyBack Driver work?

Title says it all.

Asked by talbayaty 7 years ago  |  last reply 7 years ago


Best LED driver

I am looking at making a chandelier which will consist of 6 groups of 13 LEDs. Since this is being hooked to a 120 volt circuit I will need a LED driver. Is it better to build the driver myself or just buy one.

Asked by lokerin 4 years ago  |  last reply 4 years ago


HELP**DRIVERS**HELP

Ok yes its me again with the need for more computer help...(I am slowly getting better) Ok I just recently fixed up a windows 98 computer (well 4 of them) And I really need drivers for them. What is the best place to find them? Is it possible to put a big database on a CD ? Can I make a disc of drivers from my windows XP computer ? Where can I download a bunch of them ? EDIT: I have to use my windows xp computer to get the drivers because the computer I am working on needs drivers for the Network Card

Posted by littlechef37 11 years ago  |  last reply 9 years ago


LED driver question

Reposting need help Can I power an AC LED driver with DC voltage, from what I understand the driver controls voltage and current. I purchase an LED light 7 x 1watt , the driver was rated 85 - 265 volt ac input but the seller had written 12 volt DC with grease pen across the printed label. This light works fine so I ordered 7 more like it with same ratings from a differant seller and they only work on 115 - 230 volt. Now I need to find proper driver or ship back to Hong Kong( Grrrr) I have seen drivers rated at 12 volt AC, will these work on 12 volt DC voltage? Thank you in advance, Duncan. 

Posted by dsr. 6 years ago


Unipolar motor driver?

 Dear all  I have this stepper motor and timing for driver(please see photo). Please help me to know time on and off of pulse(frequency) for the  motor rotation 1 turn per minute (1 RPM).Thank you in advance for your time.

Asked by lam 5 years ago  |  last reply 5 years ago


Best LED driver?

I need to driver (5) 1watt white LEDs (forward voltage of 3.2~3.5v) and current of 350mA. I guess the best way would be to connect them all in series and somehow give them power. This is meant to be powered off of the wall socket (whether through SMPS or a capacitor or a resistor or a transformer or anything.). My question is what's the best way to drive them? I've never really used high power LEDs before. I'd also prefer to be able to adjust the brightness...

Posted by guyfrom7up 10 years ago  |  last reply 10 years ago


Best driver for this led? Answered

Sorry for posting a repeated question(i think) Well, i'm so new to high power LEDs, My dad bought a high power LED on ebay http://www.ebay.com/itm/160584479457?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649  The LED has the following specifications  Working Forward Voltage (VF) : 9-12V DC Working Forward Current (IF) :1000mA   Intensity Luminous: 800Lm The seller told me to use a  DC DC converter for it. I will not pay $20 for one.  I've seen lots of sites about the driver but most of them has circuit made for  LEDs which have a forward voltage of 2.8-3.6V. and mine has a Forward Voltage of 12V. So what will be the best driver for it. I found this one but i'm wondering if this would work http://www.simple-electronics.com/2011/09/high-current-led-driver-using-fet.html

Asked by ARJOON 7 years ago  |  last reply 6 years ago


Screen driver and raspberry

Hi, could you help me? I found this photo player and I would like to know how to connect my raspberry pi3 or connect an av input Thank you Screen work in 5v 2amp.

Asked by c510k 11 months ago  |  last reply 11 months ago


Laser diode driver? Answered

Dear all.. I would like to use this circuit (please see photo) for driver a laser diode to  engraving wood  -Item Name:ML101U29-25 (Mitsubishi) Power output: CW 300mW Pulse Power: 400mW Working Current: <340mA Working Voltage:2.2-3.0V  I know about this formula I = V/R But in this circuit I am not sure for calculate current .So please could you help me to know how many (mil.amp) I must setting for 9 volts power with maximum output 300mW (with safe laser diode ). -Or you show me other best circuit Many thank you.

Asked by lam 3 years ago  |  last reply 3 years ago


Flyback Transformer Driver

I was looking at this page on flybacks, and I was reading about the transistors, when I realized that I don't know anything about picking transistors out. I'm an electronics noob, what can I say. Would these work? The flyback is going to be from an OLD computer monitor. I need help.

Posted by John Smith 11 years ago  |  last reply 11 years ago


3.7v LED driver

Hi guys how are ya doin? :DRecently I'm working on the next project, which is about battery powered bicycle led lamp. So in that case I want to use LED driver. Then I've founded this schematic with CMOS 555 timer, who runs more than 5 LEDs in series. Excited by this new found schematic, I bought the parts & connected them like so. Unfortunately, it turns out, it wont work. :/ At 3.7v they won't even light up, but at 5v they start to shine a little bit. I'm wondering do I need to put different transistor (in my case it was PN2222A - that's the one I had and its equivalent to 2N4401)? Or what the problem with this circuit.I would more than thankful for your help. :D

Posted by JohnSmith-Workshop 2 months ago  |  last reply 2 months ago


Aquarium LED driver?

Im looking for a schematic that controls 1w leds for my fish tank light? i need the control to be dimmable and hopefully programmable so i can incorporate a sun motion effect and then a moon motion effect! i say hopefully because this will need to be an add on later in the project as id like to have the initial lighting up as quickly as possible! As far as i know so far, the circuit is a basic constant current circuit but  i need a "buck" driver or PWM to enable the dimming by varying the current! so my questions are :- 1. Does anyone know of a simple, reliable and cheap circuit to use? 2. Because of the amount of LED's ill be using im not sure i like the idea of having all the lights in a series configuration because if one fails, thats a lot of lights to test! 3. If i have to use a computer to run the lights id like to be able to make it compatable with the raspberry pi therefore id need a program and mounting software for the pi, so anyone know of one? 4.Right to the power, i dont care what voltage it runs on but id like to only utalize one plug socket if possible, i do have a few power supplies laying about for various things like old laptops and old pc's, so what do i need to power it! i cant think of any more at the moment but you guys know what im trying to achieve so im sure you know what questions i have missed! as i said though, id like to start simple and work up to sun motion control and timers! Thanks in advance for any help anyone is offering! 

Asked by Xmortx114145 6 years ago  |  last reply 6 years ago


Stepper motor driver?

Hi! I am trying to find a good h-bridge for a 3 volt stepper motor. Basically my plan is to build a stepper motor controller with an arduino for controlling various functions in a model kit. I have the arduino-kit and the motors. But I need a good reference for a h-bridge, but all i can find are chips rated for much larger drive currents. Also exactly how hot does a hbridge get when under load? I would like to integrate the bridges into the kit, but since it is plastic, I would like to know in advance how hot it gets, and if it gets too hot I'll have to look at another solution.Any help appreciated! PS. If you can please put the hbridge part ID in your answer for easy reference. DS.

Asked by feldreich 13 days ago  |  last reply 11 days ago


driver for usb to serial converter ?

Hello , I want burn some hex code into the memory of microcontroller so recently I bought usb rs232 serial cable with driver cd. after installing driver I can't find com port in device manger  I see only two option window 7 PORT (COM&PORT;) ZTE Diaagnostics Interface (com 4) ZTE NMEA Device (COM 5) when cd (overfly ) load it come with following files BF-1284 CH341SER direct and net link driver guiter cable driver HL-340 UEPA15C USB RS232 PL driver USb -RS232 I have installed USB RS232 PL driver and USb -RS232  . but I can't find com port in device manger for serial cable ?        

Asked by vead 4 years ago  |  last reply 4 years ago


Help! Cnc stepper driver

Help,I need to know whether this stepper circuit design is capable of driving stepper motors for cnc milling.. Here is the design www.pminmo.com/3axispic/3axispic.htm

Posted by quadcube 6 years ago  |  last reply 6 years ago


One Insanely Skilled Bus Driver

A bus, a tiny bridge, and a 100-point turn with wheels popping off the edge.

Posted by fungus amungus 11 years ago  |  last reply 11 years ago


Super Bright Blue LED Driver Answered

I was about to start a project when I got stumped. I need advice on what driver circuit would be best to drive 10-20 super bright blue LEDs off of batteries. Thanks for the help. P.S. If you need me to specify anything (which you probably will) just ask :)

Asked by budhaztm 6 years ago  |  last reply 6 years ago


driver bad in computer? can anyone help?

Asked by 9 years ago  |  last reply 9 years ago


Need help to build a flyback driver.

Hi every one, I've been working for several weeks on a diagram of flyback driver referring to this video to get an electric arc which can handle a day turned on: http://www.youtube.com/watch?v=DE4GfpOSWW0 Here is the assembly that the author gave me : http://st-ware.com/files/misc/smallgen_en.png And here is the assembly I'm working on : http://alexmira.fr/images/schema00.jpg The RC1 capacitor is either a 630V 220nF MKP is a 1uF 630V. I've done and redone it on my breadboard but impossible to get anything. Could you help me to acheive this or tell me what are my mistakes. Thank you in advance.

Posted by exesnot 6 years ago  |  last reply 6 years ago


How to modify a constant current LED driver 700mA into 350mA?

Is it possible to modify a constant current LED driver 700mA 5W (230V input) to use with 4x1,2W 350mA Diods??

Asked by Allecc 5 years ago  |  last reply 5 years ago


Does anyone know where to get drivers for a hammer morespace 1TB?

Asked by suspect007 5 years ago  |  last reply 5 years ago


Can i replace mosfet irfp250 with irfp460a in ZVS driver ?

Asked by vnguyễn19 6 years ago  |  last reply 6 months ago


max output current of cc cv led driver if i use leds in parallel?

I was thinking of using some 2w leds which i already have for home emergency lighting setup. I was thinking of using http://www.ebay.com/itm/10-PCS-Led-Driver-For-1w-watt-led-MR16-1X1W-3X1W-led-light-bulb-DC-12V-/191066699095?pt=LH_DefaultDomain_0&hash;=item2c7c767557 as the driver of the leds. And i was wondering if i could run 2 of the leds in parallel from that driver. i will be using a leatsink for each of the leds. So... the main question is how much current would each of the leds be reciving from one driver. will it be 350ma to each of the led or 350ma total to both the leds... ie 175ma to each led. Thank you

Asked by bipl12 4 years ago  |  last reply 4 years ago


can anyone help me make a circuit for a EL wire driver? Answered

Hi  i live in a area where el wire drivers are not available however i can get all the parts to make one i know that i need to step-up a 9v battery to 130v at around 2000-3000 Hz  to make it glow  i want to keep it simple and not make it blink thus eliminating any kind of timer or ic can anyone please help me with a circuit design and the parts required thanks a lot

Asked by cfrek 6 years ago  |  last reply 6 years ago



I am looking for a driver circuit for a laser diode

This is the diode I am talking about http://za.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R;=6541866I am looking for a circuit to build myself so if any body know of a place to find such info it would be greatly appreciated

Asked by heimo 9 years ago  |  last reply 4 years ago


Stepper motor, driver, microcontroller

I am looking for someone to help me with with a stepper motor. (ofcourse you get paid) I would like to have a small stepper motor something like this(the main thing is that it isnt bigger then WxHxD 50mmX60mmx15mm) . http://dativoweb.net/sites/default/files/u33/ItaliaImballaggio/5_14_delta_line_motore.jpg I would like a driver and a microcontroller to this almost in the same size, would love to have this thiner thou. I would like to have this programmed, like the stepper to do 1 revolution in 180 minutes (1 full rotation in 3 hours) if it possible to get it running on batteries it be great! Folow the link to a image i made to se how i like it to be. http://lajkade.se/stepper.png Is this possible? And is it someone who got the knowledge to do this? Awaiting your answere! Best regards Jacob

Posted by soderhjelm 3 years ago  |  last reply 3 years ago


Do avalanching diodes "latch up"?

While working and revising my flyback driver design, I had one of the 1N4148 diodes that I was using as protection get cooked!  (it seemed to fail short circuit) I have not tested to see if the MOSFET survived yet. Obviously the diode needs to react fast and handle avalanching energy well. Any suggestions? are some beefy schottky diodes suitable? Also, does making any ordinary diode go into that avalanche or zener reverse breakdown region cause it to potentially lock up and conduct for a period longer than the EMF spikes I'm dealing with? Or with any sort of hysteresis (like when using neon lamps)? Originally my wimpy glass 1N4148 diodes was wired in parallel directly across the MOSFET drain and source reverse biased. However, carefully examining this tesla coil schematic,it appears that there is both a forward biased diode in series with the MOSFETs, and another reverse biased diode(s) in parallel across the MOSFET & diode. It does not look like a bad idea given one the reverse biased diodes can shunt EMF spikes that are too large while the other isolates them from the MOSFET. My only concern is how lossy that would be at 12V operation.

Asked by -max- 2 years ago  |  last reply 2 years ago


How do I drive a 5 phase stepper motor without using an IC?

OK, so I have searched on the net to find the answer to this and I can't find a suitable answer, so I am turning to everyone here :) I have a stepper motor: 5 phase stepping motor A5729-9115FV DC 2.0A 0.34 OHMS/PHASE 0.72deg/ Step FG6-5569 01 xx8n601918 oriental motor co.ltd My question about this, is if there is a way to drive this motor without using an IC chip.  From what I gather this motor is a Unipolar motor, it has 5 leads.I have the components to put an H-bridge together, but I don't know if that will actually drive this motor, coupled with the fact that I am new to building circuits.  Buying an IC is not really an option at this point for me(I know they are cheap, but I have salvaged all my components and I am trying to do this without spending money).  If someone would be so kind as to give me some pointers, I would greatly appreciate it. Shaun

Asked by shilts 5 years ago  |  last reply 5 years ago


3 Prong screw driver

I have a FujiFilm camera that is not working. I want to take it apart, but it has very small triangle screws all over the place. They have only 3 prongs instead of the usual 4. Where can I get a screwdriver for this? Can anyone help with this issue. Thank you

Posted by toolmanic 10 years ago  |  last reply 10 years ago


How to pick an LED driver?

Say I have 3 LEDs in series that have a Max Forward Voltage of 6v and an operating current of 1000mA. I could get a driver like a buck puck, say the 3021-D-E-1000mA BuckPuck. It has an input voltage of 5 - 32v, and let's say I give it the full 32v, so how does that not end up burning out my LEDs? My actual goal is to have 3 strings of 6 Cree XP-e LEDs connected to 3 Drivers. But I can't quite figure out how to properly size the driver. I know it puts out a constant current, and the voltage fluctuates -- what is there to determine which one to get so I don't end up pushing too much voltage? Or am I misunderstanding something about how the voltage will fluctuate? Sorry for the noobishness, this is my first real electronics project.

Asked by z0dii 5 years ago  |  last reply 5 years ago


L239D Motor Driver IC? Answered

I saw some example circuits on how to control motors using L293D and arduino , Some included a lot of capacitors and some not at all.Which way is the correct one and what are the capacitors used for in the circuit.

Asked by Bot1398 6 years ago  |  last reply 3 years ago