Can we repair the CFL?

[delnoram]

Otherwise, it would seem that we can use economical lamp electronics for traditional fluorescent tubes. In practice, it works but I am not sure that the output power of this electronics is sufficient to supply a 36 W tube. If someone has an idea on the question ...

It is the case, if you take a montage of twenty Watts, it works, but with a loss of brightness, which is not annoying if the room or the area to be lit is not too large.

[Obelix]

Hello,

Something stupid gleaned from the canvas:



Allows to recover all the bulbs "messy" or has cut filaments!

Obelix

[I Citro]

How do you say it in French?

I did'nt understand everything...

[iso14000]

this assembly is very funny! this is a kind of modified flyback feed:
When S1 is closed the transformer primary accumulates energy in the form of magnetic flux
When it opens the flow cannot suddenly stop in the transformer a very high voltage appears in the secondary allowing to start the tube

the diode is useless it seems to me, it is an educational assembly and not expensive to carry out, on the other hand I do not give expensive skin of the relay S1!

Otherwise the allusion to the fact that the battery is recharging ... there I think the guy smoked the carpet! yet another who believes in perpetual motion and "free" energy!


More in the subject: my filthy IKEA lamp with its burnt PTC thermistor came back to life by replacing the PTC with a 3K ohm model, it even primers too much glass and the resistance heats up a bit so I will increase its value .....

[I Citro]

For your Ikea lamp, you can give me the ref of the PTC (with a photo if possible) Because I think it is this component that is most often loose.

When it burned, difficult to read its characteristics ...

For resistance;
- You want to increase its power (replace a 1/4 of Watt by a 1/2 Watt, for example)?
Ou
- you want to increase its value in Ohm?

I threw several bulbs out of order to keep only the base that I equipped with LEDs but I have left with a burnt out component which could well be the PTC of which you speak ...

[iso14000]

no I will increase its ohic value because in fact the choice of the value results from a compromise:
the lower it is, the more current there is in the filaments and the more the start is frank.
But then the filaments wear out faster and the PTC heats up more (and therefore and the permanent current is high and therefore the consumption too.

You understood :
putting a low value (PTC) improves start-up, but the service life of the assembly decreases.
setting a high value makes starting tricky but makes the system more reliable

guess what designers we choose?

for the photos I will try to make them, and I will give you the Farnell reference tomorrow.

Florent

[iso14000]

CTP is this one

http://fr.farnell.com/jsp/Composants+pa ... ku=1187076

but I am not sure that this is a correct choice.

[iso14000]

In fact the CTP is optional, it only serves to make the ignition more frank ... no unpleasant flicker on power up.

My failure came in fact from the condenser of liason between the filaments, it had heated well because under dimensioned and with force had unsoldered. The replacement by a more robust model brought the bulb back to life ... which I hope long considering the time I spent on it.

I decided not to issue a CTP

a little research on the internet makes me think that almost all of these lamps are made in china by a single company .... its promises!

[iso14000]

for purely statistical and scientific purposes, I would like to analyze faulty compact fluorescent lamps:

So I'm looking for generous donors .....

[iso14000]

and here is my old compact fluorescent IK..A come back to life (for how long)!



note that it has one less component (the CTP) and a better quality component (a capacitor)

Anyway, I recycle ...