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Everything posted by ante

  1. ZomBIE, I always wondered where 8) CIA 8) purchase their stuff, now I know! Ante ::)
  2. mihpa, I have used an 8A transformer so I can say for sure that it is enough, but maybe a 6.5A will work. If you have one lying around, try it and you can report back if it works. The reason I chose an 8A is that there are very high currents when switching and a 5A transformer will not give you 5A out from this circuit at least not in the higher voltage range. Ante ::)
  3. mihpa, I have built this circuit and it works fine. To feed this circuit you need a transformer (28V 8A) and a rectifier (20A). It is not necessary to stabilise this. Yes you can adjust the output voltage 2.5
  4. Vainajala, Looks good to me, I would hook it up and try it! Ante ::)
  5. vainajala, I have Proteus but no model for the TL 494. :( Ante ::)
  6. Vainajala, Can you simulate it ? Ante ::)
  7. vainajala, They will have a very short life with 2A, a few seconds perhaps! It better not happen with the most expensive LED:s. :o Ante ::)
  8. CWT, Try this! http://pdfserv.maxim-ic.com/en/ds/MAX220-MAX249.pdf Ante ::)
  9. vainajala, Then I would change the TIP 32A for a MJ 4502 or similar. The inductor and diode should be higher rated (10A+) and the voltage and current feedback resistors changed to give you the desired output. A bit larger caps is necessary and remember heavy wiring for the input / output path. Ante ::)
  10. John, Why is the thread closed? Is there any difference between them? Ante ::)
  11. New, Here is an article by the respected Robert Penfold. This is not exactly what you asked for but I think it 0799g.pdf
  12. MP, Thanks for your input I see what you mean. Could this be an accurate instrument do you think? Ante ::)
  13. vainajala, Welcome to this community. When rectifying and filtering 32VAC you end up with about 50VDC and this is to much for the TL494. Ante ::)
  14. Rhonn, That is an ENORMOUS site! Thanks for sharing mate ! Ante ::)
  15. Rhonn, Have you found any good tutors on the web for Proteus? I have the original manual but it
  16. Rhonn, The voltage at the bases can be adjusted between 6.5 to 11.5 volts if my calculations are right. The voltage at the collectors is about 25V, does this make any sense to you? The output will not charge a 12V battery, or am I missing something? Ante ::)
  17. audioguru, This will be a long answer. I sometimes get the feeling that you don
  18. MP, Rhonn, Well the first thing that strikes me is what happens if you connect a battery that
  19. Try this http://www.sonsivri.com/forum/default.asp Ante ::)
  20. Some more info on ballast: http://www.irf.com/technical-info/appnotes/an-998.pdf http://www.irf.com/technical-info/designtp/irpllnr1.pdf http://www.irf.com/technical-info/designtp/irplcfl1.pdf http://www.irf.com/technical-info/appnotes/an-995a.pdf Ante ::)
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