Search results

  1. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    :D thanks you too for your help and all who helped. I am still building the PCB since I had little time but I willl post the results of using a 30vac 5A transformer and post pictures as well like I did in the previus project (which was the same PSU but with the rated transformer. THanks all 4 now
  2. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    It's ok I already bought the components and lucky for me I bought everything double the wattage. meaning 1/4 ... I bought it 1/2 a watt and so on.. anyways here is the modified PCB (only Q2 package is different) for anyone who is following the thread pcb.zip
  3. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    Great I am going to modify the PCB for the TIP31A and im off to etch the PCB .... thanks my friend.. one question.. are you 100% sure it will work ? :D thankyou
  4. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    Is any one working on this mod?
  5. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    OHHHH BOY ... but filtering and smoothing the ac voltage, wouldn't it go up a little ? passing ac from a bridge and a capacitor will increase the dc voltage. ??? let's assume that they wouldn't give me the current ou mentioned, I still want to make this PSU accept 30vac from the transformer so...
  6. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    But I have a transformer with 4 outputs and 2 of them are: 30Vac 5A (both of them) As you can see I cannot change the transformer because it costs a lot (110 USD) and it was customly made for me. Im stuck with a 30Vac 5A transformer :-\ About the modification to make this circuit work iwth...
  7. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    ??? I dunno im not that technical. I can only follow a schematic and build it .. I don't know what the circuit would be doing thou. Um .. so you suggest to try and find a circuit that takes 30v transformer 5A? Il try to find something than .. any help would be really appriciated since you are...
  8. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    I was thinking a little... So you need a 24VAC 3A transformer for the original circuit.. and you need a 30VAC 5A transformer to make it go up to 5A?? When you rectify the 30VAC they would go up to 44vdc !! Isn't 44vdc a lot for the circuit? That is why I reduced the voltage with a regulator...
  9. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    Well as may know I was crying for help on some previous posts... I don't know a thing.. I just passed on what the engineer told me ! he said that if the circuit wants a 24vac transformer with 3 A , than I should change those components to make it take up to 5A and if the transformer is 30VAC...
  10. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    If by any chance you have a transformer which is 30v and also 5 amps do both the modifications. hope my last 3 posts help all who needed the modification and I would love if anyone would point out any mistake that the engineer has taken ..
  11. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    To change this circuit to 5 Amps was already posted in the above thread.... now what if you have a 30v transformer instead of a 24v? Follow the diagram attached below.
  12. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    Hello everyone I need to build this transformer quickly so I couldn't wait for help on this forum so I asked the R&D Engineer were I work and he modified it for me. Now since I recived a lot f info from this forum I will share the modification and even HELP anyone who needs more info. To...
  13. Xenobius1

    Drilling IC holes in a PCB

    Or else use a very high speed driller (30,000 RPM) like mine and it will drill the PCB instantly without running off before cutting. Drawbeck is that you must aim right or else it will drill were you do not want it
  14. Xenobius1

    High current fixed voltage

    Fixed = Stabilised = I do not need to vary it And no im sorry but I can only follow a schematic drawn :D thanks a lottt
  15. Xenobius1

    Led display Digital Voltmeter question

    Try to use a drawing software like photo shop or paint shop pro to resize the pcb and before you print always check the size from print preview so you would know if it's over sized or not!
  16. Xenobius1

    0-30 Vdc Stabilized Power Supply

    ok thanks for the dummy load .. I will work on it as soon as I start/finish the 5Amp PSU mate :D thanks for now
  17. Xenobius1

    High current fixed voltage

    Hello all I would like some help in building a fixed voltage. I have 12vac 12A which I would like to make them 12VDC Fixed and 5vac 5A which would like to make them 5VDC Fixed. I know I have to pass them firstly from a bridge ... I bought one which can go up to 25A so now you can say that...
  18. Xenobius1

    Drilling IC holes in a PCB

    Well first of all you must use a SMALL driller to it is easier to handle and ofcoarse a small drill. The normal sizes are 0.8mm for normal components, 0.6mm for vias (jumpers) and 1mm for large componnets like voltage regulators, large rectifying diodes etc.. IF You use a 0.8mm drill and a...
  19. Xenobius1

    0-30 Vdc Stabilized Power Supply

    Right now I have 2 projects in mind the modification of that PSU to make it for 5Amps 30Volts and the Dummy Load. Could you help me with both mate? thanks
  20. Xenobius1

    Convert 0-30V 3A PSU to 5A or more

    I have a torodial transformer with 2 outputs of 12.6v so I put them in series to get 25.2v and the result is that it gives me 34.8vdc (if you want to see the picture go to http://www.electronics-lab.com/forum/index.php?board=2;action=display;threadid=128;start=75
Top