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  1. smokyLED

    LM317K regulator current problem

    thanks audioguru!  ;) so i'd have to run 2x 2955 in parallel with 0.47 ohm resistor. 5W variant? and change the base resistor to 2 ohm 5W i was testing with 12V before.
  2. smokyLED

    LM317K regulator current problem

    I'm making a bench supply out of the 5A Constant voltage/current circuit on page 16 of the LM317 datasheet http://cache.national.com/ds/LM/LM117.pdf. I've replaced the MJ4502 transistor with a MJ2955 TO-3 transistor. Thing thing works fine for current up to 1A, adjusted via the pot. But once u...
  3. smokyLED

    0-30 Vdc Stabilized Power Supply

    ok, who's gonna sell me a pcb with the update design?  ;D
  4. smokyLED

    0-30 Vdc Stabilized Power Supply

    where can i buy the pcb from? it is hard to make it myself, since i hae no where to dispose of the chemicals. what can be used to replace the 2n2219 transistor, and cna the TL081 be replace with a TL071
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