Hello PicMaster!
Have a look at my post from August 27, 2009, 05:18:37.
I posted my schematic with my bill of materials. I built this power supply and it works perfectly!
I used a 2x30V/230VA transformer in order to build a dual version.
Link to transformer...
Hello!
Yesterday I got an oscilloscope to see if there is an output voltage ripple.
And I have to say: I was not able to see a ripple. Not even by 0,05V/div.
I measured it by 30V 0A; 30V 3A; 1V 3A;... with current limiting and without
My power supply works very fine! ;D
Thx for all your...
Hi audioguru!
Thank you :D
The schematic is for simulation only. I added a small statement in the schematic: "For parts value see bill of materials". There you can see that I used a BD139 for Q2. In LTspice IV there is no BD139 in the database ::)
I also don't know why the current limiting...
Hy Guys!
Okay - after 1 damaged Zener and 2 damaged power transistors my power supply is now finished.
My experience:
- I used the MC34072 oamps with max.44V instead of the MC34071. With the MC34072 I was not able to do the offset compensation. So the current limiting became a problem. ( When I...
Hi!
Thank you for your fast answer!
I can put your mind at rest - the rectifiere-diodes are for simulation only 8)
I have found a diagram for the Fuse - it will not be blown by the current :)
I haven't found a MC34071 so I decided to use 3xMC34072. But thanks for the advice!
The...
Hey Guys!
It seems to be a view gurus here and I hope someone is able to help me!
I bought the whole parts which are needed for the second project shown in the schematic. I have simulated the schematic and now I am not sure if some parts will be damaged.
I used a 30V 230VA Transformer with...