need help for cfl lighting

[pier1]

u are right . I made a mistake by missing one resistors .

Do u have any Idea about the winding details Or could i get a new one for that

Pier

 

[audioguru2]

Do u have any Idea about the winding details

Every transformer is different. The number of turns for a feedback winding is a ratio with the existing number of turns in the low voltage winding. You don't know how many turns are in the existng winding.

There are lots of ways to make an oscillator without using an extra transformer winding.

 

[pier1]

the low voltage winding is 8 - 0 - 8 and 0 is battery +ve

 

[audioguru2]

Where are you going to buy an 8V-0-8V transfomer that has an extra feedback winding?
If the turns on the extra winging are not enough then the inverter won't start, If the turns are too many then the transistors will blow up.

 

[mvs sarma]

you may use 555 as oscillator and use one driver transistor like C1061 and use 6V/230V transformer [ if possible the core shall be repacked (All Es one side and all I s other side ], with a gaping paper placed between them and the whole Transformer repacked) to prevent saturation-- for oscillator you can also try cd4047b both in astable mode at say 40KHz. of course the component count will be more as compared to what you showed. Finally the CFL will not have filament drive and the CFL itself needs a modifivation in the sense that these CFLs come with a built in starters meant to work at 230v/115v AC with a suitable choke. this starter is to be replaced by acombination of 470K(0.25 W ) resister and 2n2  cap in parallel.

many chinese make lanterns use HiTachi type 6" tube without filament pre-heating

finally perhaps audioguru 's openion is right that the illumination may not be to the expectation??

you may however try it out

sarma