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iliaskr

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Everything posted by iliaskr

  1. ok...i will try to find a tle2141.. funny thing is that in every shop i asked about it they either never heard of it, or thought it was obsolete. especially with the crisis here in Greece it is very hard to find components in stock anymore, maybe online.. i'll get the 2141 somehow and will check again the circuit thanks
  2. i had the original pcb from ages ago so i modified it (at least i tried) with audioguru's changes. however i am having the following problems: voltage regulation seems to work, but when the current goes over 1 amp, i have oscillation on the 3055s and c7 gets very hot u1 gets a bit warm the current limiter works in a weird way, i mean, it limits current up to the middle position of the potentiometer then it allows current again. the led has a constant dim light and when the current limit kicks in it lights fully now, i should mention that i could not find tle2141 so i used ca3140, the closest i could find here also, i tried a higher value for c7, it reduced the oscillation, but it's still there i replaced the d13,d14 with the original 5.6v zener, before, the led burned up i am suspecting i have done something wrong modifying the old pcb, or the ca3140 is not proper for this i might try this on a stripboard if i have the time.. any suggestions?..
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