Hi,
HAve this setup, but with just a single LED conneced( For test) the transformer gets very hot.
So do the 7824 and 7805. The data on 7824 is 27-38v in,. and out 24v 1,5A,
The data on 7805 is 10-35v in, and 5v 1,5A out.

Can i connect the transformer as shown ?
2*15V 5VA. (Myrra 44274)
I will only be using max 300 mA in 24V and 50 mA in 5v.

 

That sounds like your transformer is wired wrong, have you got a dvm to measure the voltages.?

Can you post pictures of the works.

 

DVM ? Digital volt meter ?
Yes i have, and i have around 34,5 V AC (2*15) and 45 v DC before 7824 regulator,. maybe therefor , max is 38v DC

Edit, wired as in diagram.

 

 

From your figures you have a rectified DC of 45V and the maximum input voltage for the 7824 is 38V.
It is not surprising it gets hot.

 

ok, do i then need another transformator og can i drop the voltage other ways ?,

 

A different transformer (perhaps 12V-0-12V) or you put another regulator between the transformer and the 7824. An LR8 (up to 450V input) would do the job but less extreme versions may be available.

 

What do you need 24V for, how much current draw is required?

 

Just guessing here, but from the diagram in post #4, could that be a scavenged transformer from a wall wart or a brick? If so - they're not designed to operate on 50 to 60 Hz. IF (and that's a big if and a big guess) it's a transformer from a SMP (Switching Mode Power) supply then it's designed to operate somewhere around 20KHz. (20 thousand, not 50 or 60 hertz).

 

The transformer is for 230v ac 50 hz.
I need 24 for driving a lot of led in series, 12 pcs 1.85 v. ~24v.
But they will tale up 15 mA× 6 = max 100 mA.

5 volt is only used to some MCU 10mA max.

Will find a transformer 12v×2