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Recent content by smithn

  1. S

    RC Circuit Isolation

    I am using the capacitor as a kind of "time out function". So the two relay contacts shown on the left need to switch states at the same time, or very close to it within ~1 second. So the capacitor still supplies power to both the LED and Input for that short amount of time. if the relays fail...
  2. S

    RC Circuit Isolation

    Its approximately 1 ohm I cant remember if I have a 1 ohm or a 0 ohm in there now. In between the LED and RC portion.
  3. S

    RC Circuit Isolation

    Right now 555 timers and LM339's are not approved devices for this application. Right now only certain Relays, Resistors, Capacitors, Opto isolators, LEDs are approved for this application. I don't know about transistors, even though the Opto isolator is composed of transistors. I think opto...
  4. S

    RC Circuit Isolation

    I am doing this right now with a large capacitor 1000uF. The goal is to provide 85%-100% of the 24VDC to an input and LED as, a series of mechanical relays switch. The capacitor is charged with very little resistance and charges very rapidly. However if one of the relay contacts opens the...
  5. S

    RC Circuit Isolation

    Just 24VDC
  6. S

    RC Circuit Isolation

    I need to isolate a Resistor Capacitor circuit from an input. The goal is to provide power for a short period of time to an input and LED but, I don't want the resistance of the input to effect the discharge time, since this resistance may be unknown. Also the RC charge time has to be very short...
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