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  1. RDL2004

    Home-made bench power supply voltage drift problem question.

    I built my own bench power supply last winter/spring. It is a variable voltage supply using a circuit from one of the National Semiconductor datasheets using an LM350T regulator. It works pretty good, except when first turned on the voltage will not be what it was when it was turned off. This...
  2. RDL2004

    Can I run two regulator circuits off one transformer secondary?

    Is it possible to run two regulator circuits off of the same transformer secondary? One would be a LM317 and one would be a 7805 type. Everything about the regulator circuits would be separate,  from the rectifier diodes to the output. The only thing in common would be the secondary of the...
  3. RDL2004

    How to tell if an old electrolytic cap is good

    I was reading another thread where this subject came up. I was wondering what would be a good way to test if an old electrolytic capacitor was dried out or not? Maybe "dried out" is not the correct description, as I have heard of being able to "re-form" electrolytic capacitors I am...
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