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87 Threads found on Cfl
Ordinary cfl bulbs cannot be used with dimmers unless the ballast is compatible with dimming.
Hello friends i am using this inverter from last 3years. Recently i observed that the output is 282 volt ac on ups. This voltage is causing some problems with my home cfl and led lights... Please provide any solution. Thanks
Does external display work? Did you disable onboard? Does backlight cfl work? was it ever dim or pinkish?
So if I completely rewind it, I can use it for say 5v, 1amp etc, at 50khz. worth a try? In a suitable SMPS circuit, yes. It would have little in common with the cfl inverter. You have to design the SMPS circuit, e.g. using an switcher IC from or separate switch mode controller and MOSFET. Why not get you a ready-made
NOrmally these are cfl tubes 2~3mm diameter. Digikey stocks many lengths. When they wear out they consume excess current then the HV converter shuts off. So its either item. trace the cfl wire pair. Newer ones will be LED backlight. open it up and find out which type you have.
I need to design a ballast circuit for cfl tubes but I am not so familiar with them. They are in different range of power. Could any one please help how can I have some information about these ballast circuits?
When I connect the cfl bulb in UPS of the computer.cfl bulb automatically turned off.But computer run normally by same ups. What can i do?
i have a SMPS : the ratings are: 250VA i/p . battery i/p 12V. now how do i decide battery AH? say i want to use 20W 4 cfl tubes for backup time of 1 hour.
Why no negative bias on PD with C6 blocking DC? Why no DC bias current for U1-B pin 8 (+) with high R to Vref. What is 3kHz that you need? What Bandwidth for low and high frequency filters? What are the spikes from that you dont want? Freq? PW50 amplitude after 1st stage? Keep in mind wide spectral sensor will amplify cfl and fluorescent light
i had an emergency lamp with a 6v, 4.5 AH lead acid battery & lighting a 14W, 220v cfl lamp, once i had dismantled it due to some charging problem. now i am trying to reassemble it, bt i accidentally cracked a wire from the board, and i am not getting from where it is came out (it is connected to a two way switch), so i need 2 assemble a new circui
I am working on a cfl of Philips make, 11 watt, 220-240 V, 50 Hz. There is a component called F1, that looks like a resistor, having 4 bands yellow violet black gold. Is it a fuse? if yes what is the value?,
Hello. I'm new here. The standard suggested circuit seems to have a few problems with cfls. I implemented it, and when the light is turned off, it randomly "flashes" for a fraction of a second. From what I could understand, this is caused by the cfl low consumption. One of the fixes was to make it consume more. And I would like to know if a differ
Hello, I am working on an unconditionally stable FDTD scheme (like ADI-FDTD). When dt is above the cfl bound, what I noticed is, the scheme works fine for certain time steps -- until the gaussian incident pulse makes the turning (at the lowest or uppermost peak). Then after this turning FDTD becomes unstable. The scheme works fine when dt is be
I have got a 2 pin 9 W UV lamp. In order to turn-on the lamp i need an electronic ballast. The ballast unlike cfl must give two pin outputs. And I have got ballast from my cfl lamp and it has got 4 output pins. Are there ant ways so that i can use 4 output ballast for 2 pin lamp. Thanx in advance !!
Supposing I have two lights, one LED and one cfl. The cfl took much energy to produce because the glass had to be smelted, and that glass tube cannot be re-used unless smelted back down. The LEDs would have a Perspex cover, which presumably takes less energy to manufacturer than the glass tube of a cfl? Also, the Perspex cover over (...)
Hi from tl431,regulated from a SLA battery of 6v. this is an opamp comparator circuit i made to cut off the cfl emergeny lamp i made months ago. the problem i am facing is that this circuit puts off oscillations,but again SLA battery recovers voltage to to b
Hi all, I am trying to develop a low voltage cut off circuit for lead acid 6V.Can anyone pls guide me. This circuit is to cut off a cfl emergency circuit i made from junk(thanks to chucky for his help) I am trying to avoid the relay.i used LM 358 as comparator. but it seems failing. pls help.
Hi all, Is it possible for a cfl to produce Skin effect ? The working frequency is 13 KHZ, material is aluminium coated over plastic( reflector+ holder),approximate voltage is 300 V. the current should be around 40 mA.
Hi i am new for this forum i want to make DC 12v to 20w cfl without any modification in the cfl and low cost can some one give me best way for do this please help me thanks
Hello, I'd like to automate some functions in my house, particularly, turn on and off cfl lamps with a triac coupled to the logic via a zero crossing optocoupler. I saw that many people have functional and reliability problems and wondered if one of you could point me to a robust design: i have no T&M equipment :( My cfls are 220V 50Hz with pow
Hi goldsmith, actually i am new to circuits like joule ringers and royer oscillators. This is a cfl driving circuit for 9w 6500k with self start. The schematic seems very similar to royer oscillators. I found this circuit is running in 13 khz (primary),attempted to make one like the transformer in this. Even if i try to make exact same turns i
89233 Pls can any one explain how this cfl circuit works ??? I am trying to reverse engineer this circuit. I am not sure how it selects frequency 63 KHZ, how this circuit is designed to provide HV DC for cfl. pls help. - - - Updated - - - sorry there is a mistake, the bobbin size is e25.
hello sir i want to drive a commonly available cfl (fluorescent lamp) of 15 watt by the means of a 6 volt 4.5 ah battery available in emergency lights . i searched it , but came to know about it only but couldn't find any circuit or unit . . . All the available units are designed for 12 volts battery but my aim is drive it with 6 vo
CAN ANY ONE PLEASE TELL ME HOW I CAN DESIGN A ROYER CIRCUIT FROM SCRATCH... My purpose is for driving cfl tubes. I am totally newbie to ferrite transformer winding the retailer, I hear there are some sizes and types too.I am totally confused about this LC circuit frequency selection.
I don't believe that the suggested detection methods work. There's no easy way to distinguish daylight clearly from a collection of different artificial light sources, e.g. incandescend light, HID, white LED, cfl. They have all different spectral characteristics and NUV or NIR intensity may be lower as well as higher than daylight. A resolved sp
basically these are high voltages transistors which are widely used in cfl BULB(ENERGY SAVERS LAMP8714287143). you can find out these from cfl BULBS
Hai friends, I want a internal circuit of cfl bulb for PCB Project. if you have that circuit please sent to me. Thank you Salim
You need one of two things, before making calculations. 1. LDR data. 2. Precize LUX meter. In redneck style you can use LDR to some well known light source as new cfl lamp (you can see how many lumens lamp have on lamp box), and meter light with LDR, then use opamp to make 0-5V range for uC ADC input, and make calc. See this t
Yes, it is possible, but the voltage must be stepped up. The cfl may be run from a high voltage DC supply. So, just stepping up the 12VDC to around 300VDC should be enough. Here's one simple circuit you can use: Hope this helps. Tahmid.
What a coincidence, I'm currently doing the exact same thing. If the wave isn't propagating properly, its most likely a cause of your discretization. Are you meeting the cfl condition?
The black deposit is sputtered electrode metal. In a first order, it represents the accumulated energy that runned through the tube, similar to the "blackening" of cfl lamps. If you review the datasheets, you'll notice that flast tubes have rather finite life times. I don't think that any of the listed "causes" has considerable influence, apart
Maybe CRI? Also the latter one seems to have additional tests performed for relative chromacity v temperature and current, and can be driven at higher temp. The odd colors is the one reason people get annoyed by "upgrades" to LEDs or cfl for home lighting..
75509 Could anyone please give me some understanding about how this half bridge drive circuit's oscillation frequency is obtained? First lower transistor turns on due to diac and then current flow through 3 winding transformer's primary winding in a manner that is going to turn on upper transistor when primary core is sa
Hi, I am looking at methods to dim a cfl as conventional method does not work. Please suggest a circuit that can control the dimming of a cfl through a microcontroller on a 230V ac line. Thanks in advance!
this is a 32 watts 220V ac cfl lamp when it is switched off for the night the lamp flickers or rather blinks at regular intervals of approx 1 minute even though there is no power supply to the bulb Can anyone please give an explanation why it is behaving in this eerie manner at night? thanks
Has anyone tried building this schematic found at this is the circuit i wanna make a PCB Layout of the circuit.. any one wanna help me out.. i wanna try this with some of my burnt cfl bulbs.. thnx in advance.
Hi friends, I have a few questions... > I saw document for cfl lamps circuit In that they are discussed about d resonance . Actually, My mind is focused on Why d Resonance is applied/used for this application? >>and what are the other applications using resonance?(find attachment) > I got one simple idea to add this one battery in
The fact is you cant run a cfl with JUST a dc volatge. You need a small circuit of inverter which boosts the volatge which will then ignite the internal gases to glow. There are ample designs on the net and google is your friend. Cheers
I couldn't decode RC5 when my cfl (room light) is ON!! I think its spectrum may contains some 38KHz modulated light... So, Now I am confused what to do if I want to decode RC5 in such condition... Also, don't know how TV is working properly even in such conditions.....
Could you please give me a design for high frequency(30kHz-50kHz) power amplifier(up to about 25W). I'm gonna drive a cfl tube using this power amplifier instead of conventional ballast circuit. Best Regards!
I have made a circuit to turn on and off 2 cfls remotely. For the remote control part, I used RC5 protocol. For turning the cfls on and off, I used triac. I have a few questions here. Firstly what I did was: To turn the cfl on, the microcontroller kept the triac turned on as signal was applied to gate continuously until the command to (...)
I'm planing to make a 145W Solar Panel and Charge my 12VDC/120A Car battery then power up with 12VDC/230VAC 1500W Inverter...And want to use my laptop charger,and table fan and cfl light. And also I wanted to know can I run any Air Conditioner unit though this inverter? Or there is any special Air Conitioner can use with Inverter??
If I understand your setup right, you are measuring the input rather than output current of an "electronical ballast" (a cfl inverter). The output current has to measured at the fluorescent lamp. For typical input current waveforms of cfl inverters, you can review this previous thread: Your measure
Dear All Could you help me :how value of R.C,L must be change for drive my 4watt 120Vac fluorescent tube. In this schema 11w .240v cfl lamp driver. Thank you in advance lam 62317
hai....iam trying to send adress of sensors(like smoke and fire) thru powerline,for that iam studying microchip AN236,but some problems are there. 1)the code is written in assembly. 2)no body in fourms prooved that the software is working after build. 3)and the cfl,SMPS,MOBILE CHARGERS may block the 120 khz carrier... 4)in the software part the
Hi, Do you know where i can get those 450V "Green blob" , radial capacitors from which you see in the cfl bulbs? I think they must be either ceramic or film. They obviously are cheap (becuase theyre in cfl's..) and have high ripple rating. I notice that cfl's use electrolytic capacitors without the necessary current (...)
So here's the issue.... I have a 600watt dimmer running 3 x 15watt dimmable cfls connected in parallel (so I believe 45watts in total). When I turn the dimmer on, the lights go from barely on to full brightness by the 2nd step, and anything more puts the dimmer into what seems to be a fault protection mode where it flashes the lights on and off
How can we improve the pf of cfl ?? As I found cfl have a very low pf(0.6-0.75 Lag). How it can be improved?
I am struggling to understand cfl circuit. I have done it half way and need your support to complete !!! Dear friends, can you tell me how the 1. oscillating circuit works - how the transistors or FET's switching done(control). 2. how the resonance frequency generates for resonance tank at the start. 3. what are the current paths when oscillat
What's the difference between a cfl and a Ccfl?